AGENTIC AI IN THE ENTERPRISE: STRATEGY, ARCHITECTURE, AND IMPLEMENTATION – PART 3

This is a continuation of my previous post, which can be found here.

Let us recap the key takaways from our previous post –

Enterprise AI, utilizing the Model Context Protocol (MCP), leverages an open standard that enables AI systems to securely and consistently access enterprise data and tools. MCP replaces brittle “N×M” integrations between models and systems with a standardized client–server pattern: an MCP host (e.g., IDE or chatbot) runs an MCP client that communicates with lightweight MCP servers, which wrap external systems via JSON-RPC. Servers expose three assets—Resources (data), Tools (actions), and Prompts (templates)—behind permissions, access control, and auditability. This design enables real-time context, reduces hallucinations, supports model- and cloud-agnostic interoperability, and accelerates “build once, integrate everywhere” deployment. A typical flow (e.g., retrieving a customer’s latest order) encompasses intent parsing, authorized tool invocation, query translation/execution, and the return of a normalized JSON result to the model for natural-language delivery. Performance introduces modest overhead (RPC hops, JSON (de)serialization, network transit) and scale considerations (request volume, significant results, context-window pressure). Mitigations include in-memory/semantic caching, optimized SQL with indexing, pagination, and filtering, connection pooling, and horizontal scaling with load balancing. In practice, small latency costs are often outweighed by the benefits of higher accuracy, stronger governance, and a decoupled, scalable architecture.

Compared to other approaches, the Model Context Protocol (MCP) offers a uniquely standardized and secure framework for AI-tool integration, shifting from brittle, custom-coded connections to a universal plug-and-play model. It is not a replacement for underlying systems, such as APIs or databases, but instead acts as an intelligent, secure abstraction layer designed explicitly for AI agents.

This approach was the traditional method for AI integration before standards like MCP emerged.

  • Custom API integrations (traditional): Each AI application requires a custom-built connector for every external system it needs to access, leading to an N x M integration problem (the number of connectors grows exponentially with the number of models and systems). This approach is resource-intensive, challenging to maintain, and prone to breaking when underlying APIs change.
  • MCP: The standardized protocol eliminates the N x M problem by creating a universal interface. Tool creators build a single MCP server for their system, and any MCP-compatible AI agent can instantly access it. This process decouples the AI model from the underlying implementation details, drastically reducing integration and maintenance costs.

For more detailed information, please refer to the following link.

RAG is a technique that retrieves static documents to augment an LLM’s knowledge, while MCP focuses on live interactions. They are complementary, not competing. 

  • RAG:
    • Focus: Retrieving and summarizing static, unstructured data, such as documents, manuals, or knowledge bases.
    • Best for: Providing background knowledge and general information, as in a policy lookup tool or customer service bot.
    • Data type: Unstructured, static knowledge.
  • MCP:
    • Focus: Accessing and acting on real-time, structured, and dynamic data from databases, APIs, and business systems.
    • Best for: Agentic use cases involving real-world actions, like pulling live sales reports from a CRM or creating a ticket in a project management tool.
    • Data type: Structured, real-time, and dynamic data.

Before MCP, platforms like OpenAI offered proprietary plugin systems to extend LLM capabilities.

  • LLM plugins:
    • Proprietary: Tied to a specific AI vendor (e.g., OpenAI).
    • Limited: Rely on the vendor’s API function-calling mechanism, which focuses on call formatting but not standardized execution.
    • Centralized: Managed by the AI vendor, creating a risk of vendor lock-in.
  • MCP:
    • Open standard: Based on a public, interoperable protocol (JSON-RPC 2.0), making it model-agnostic and usable across different platforms.
    • Infrastructure layer: Provides a standardized infrastructure for agents to discover and use any compliant tool, regardless of the underlying LLM.
    • Decentralized: Promotes a flexible ecosystem and reduces the risk of vendor lock-in. 

The “agent factory” pattern: Azure focuses on providing managed services for building and orchestrating AI agents, tightly integrated with its enterprise security and governance features. The MCP architecture is a core component of the Azure AI Foundry, serving as a secure, managed “agent factory.” 

  • AI orchestration layer: The Azure AI Agent Service, within Azure AI Foundry, acts as the central host and orchestrator. It provides the control plane for creating, deploying, and managing multiple specialized agents, and it natively supports the MCP standard.
  • AI model layer: Agents in the Foundry can be powered by various models, including those from Azure OpenAI Service, commercial models from partners, or open-source models.
  • MCP server and tool layer: MCP servers are deployed using serverless functions, such as Azure Functions or Azure Logic Apps, to wrap existing enterprise systems. These servers expose tools for interacting with enterprise data sources like SharePoint, Azure AI Search, and Azure Blob Storage.
  • Data and security layer: Data is secured using Microsoft Entra ID (formerly Azure AD) for authentication and access control, with robust security policies enforced via Azure API Management. Access to data sources, such as databases and storage, is managed securely through private networks and Managed Identity. 

The “composable serverless agent” pattern: AWS emphasizes a modular, composable, and serverless approach, leveraging its extensive portfolio of services to build sophisticated, flexible, and scalable AI solutions. The MCP architecture here aligns with the principle of creating lightweight, event-driven services that AI agents can orchestrate. 

  • The AI orchestration layer, which includes Amazon Bedrock Agents or custom agent frameworks deployed via AWS Fargate or Lambda, acts as the MCP hosts. Bedrock Agents provide built-in orchestration, while custom agents offer greater flexibility and customization options.
  • AI model layer: The models are sourced from Amazon Bedrock, which provides a wide selection of foundation models.
  • MCP server and tool layer: MCP servers are deployed as serverless AWS Lambda functions. AWS offers pre-built MCP servers for many of its services, including the AWS Serverless MCP Server for managing serverless applications and the AWS Lambda Tool MCP Server for invoking existing Lambda functions as tools.
  • Data and security layer: Access is tightly controlled using AWS Identity and Access Management (IAM) roles and policies, with fine-grained permissions for each MCP server. Private data sources like databases (Amazon DynamoDB) and storage (Amazon S3) are accessed securely within a Virtual Private Cloud (VPC). 

The “unified workbench” pattern: GCP focuses on providing a unified, open, and data-centric platform for AI development. The MCP architecture on GCP integrates natively with the Vertex AI platform, treating MCP servers as first-class tools that can be dynamically discovered and used within a single workbench. 

  • AI orchestration layer: The Vertex AI Agent Builder serves as the central environment for building and managing conversational AI and other agents. It orchestrates workflows and manages tool invocation for agents.
  • AI model layer: Agents use foundation models available through the Vertex AI Model Garden or the Gemini API.
  • MCP server and tool layer: MCP servers are deployed as containerized microservices on Cloud Run or managed by services like App Engine. These servers contain tools that interact with GCP services, such as BigQueryCloud Storage, and Cloud SQL. GCP offers pre-built MCP server implementations, such as the GCP MCP Toolbox, for integration with its databases.
  • Data and security layer: Vertex AI Vector Search and other data sources are encapsulated within the MCP server tools to provide contextual information. Access to these services is managed by Identity and Access Management (IAM) and secured through virtual private clouds. The MCP server can leverage Vertex AI Context Caching for improved performance.

Note that all the native technology is referred to in each respective cloud. Hence, some of the better technologies can be used in place of the tool mentioned here. This is more of a concept-level comparison rather than industry-wise implementation approaches.


We’ll go ahead and conclude this post here & continue discussing on a further deep dive in the next post.

Till then, Happy Avenging! 🙂

AGENTIC AI IN THE ENTERPRISE: STRATEGY, ARCHITECTURE, AND IMPLEMENTATION – PART 2

This is a continuation of my previous post, which can be found here.

Let us recap the key takaways from our previous post –

Agentic AI refers to autonomous systems that pursue goals with minimal supervision by planning, reasoning about next steps, utilizing tools, and maintaining context across sessions. Core capabilities include goal-directed autonomy, interaction with tools and environments (e.g., APIs, databases, devices), multi-step planning and reasoning under uncertainty, persistence, and choiceful decision-making.

Architecturally, three modules coordinate intelligent behavior: Sensing (perception pipelines that acquire multimodal data, extract salient patterns, and recognize entities/events); Observation/Deliberation (objective setting, strategy formation, and option evaluation relative to resources and constraints); and Action (execution via software interfaces, communications, or physical actuation to deliver outcomes). These functions are enabled by machine learning, deep learning, computer vision, natural language processing, planning/decision-making, uncertainty reasoning, and simulation/modeling.

At enterprise scale, open standards align autonomy with governance: the Model Context Protocol (MCP) grants an agent secure, principled access to enterprise tools and data (vertical integration), while Agent-to-Agent (A2A) enables specialized agents to coordinate, delegate, and exchange information (horizontal collaboration). Together, MCP and A2A help organizations transition from isolated pilots to scalable programs, delivering end-to-end automation, faster integration, enhanced security and auditability, vendor-neutral interoperability, and adaptive problem-solving that responds to real-time context.

Great! Let’s dive into this topic now.

Enterprise AI with MCP refers to the application of the Model Context Protocol (MCP), an open standard, to enable AI systems to securely and consistently access external enterprise data and applications. 

Before MCP, enterprise AI integration was characterized by a “many-to-many” or “N x M” problem. Companies had to build custom, fragile, and costly integrations between each AI model and every proprietary data source, which was not scalable. These limitations left AI agents with limited, outdated, or siloed information, restricting their potential impact. 
MCP addresses this by offering a standardized architecture for AI and data systems to communicate with each other.

The MCP framework uses a client-server architecture to enable communication between AI models and external tools and data sources. 

  • MCP Host: The AI-powered application or environment, such as an AI-enhanced IDE or a generative AI chatbot like Anthropic’s Claude or OpenAI’s ChatGPT, where the user interacts.
  • MCP Client: A component within the host application that manages the connection to MCP servers.
  • MCP Server: A lightweight service that wraps around an external system (e.g., a CRM, database, or API) and exposes its capabilities to the AI client in a standardized format, typically using JSON-RPC 2.0. 

An MCP server provides AI clients with three key resources: 

  • Resources: Structured or unstructured data that an AI can access, such as files, documents, or database records.
  • Tools: The functionality to perform specific actions within an external system, like running a database query or sending an email.
  • Prompts: Pre-defined text templates or workflows to help guide the AI’s actions. 
  • Standardized integration: Developers can build integrations against a single, open standard, which dramatically reduces the complexity and time required to deploy and scale AI initiatives.
  • Enhanced security and governance: MCP incorporates native support for security and compliance measures. It provides permission models, access control, and auditing capabilities to ensure AI systems only access data and tools within specified boundaries.
  • Real-time contextual awareness: By connecting AI agents to live enterprise data sources, MCP ensures they have access to the most current and relevant information, which reduces hallucinations and improves the accuracy of AI outputs.
  • Greater interoperability: MCP is model-agnostic & can be used with a variety of AI models (e.g., Anthropic’s Claude or OpenAI’s models) and across different cloud environments. This approach helps enterprises avoid vendor lock-in.
  • Accelerated development: The “build once, integrate everywhere” approach enables internal teams to focus on innovation instead of writing custom connectors for every system.

Let us understand one sample case & the flow of activities.

A customer support agent uses an AI assistant to get information about a customer’s recent orders. The AI assistant utilizes an MCP-compliant client to communicate with an MCP server, which is connected to the company’s PostgreSQL database.

1. User request: The support agent asks the AI assistant, “What was the most recent order placed by Priyanka Chopra Jonas?”

2. AI model processes intent: The AI assistant, running on an MCP host, analyzes the natural language query. It recognizes that to answer this question, it needs to perform a database query. It then identifies the appropriate tool from the MCP server’s capabilities. 

3. Client initiates tool call: The AI assistant’s MCP client sends a JSON-RPC request to the MCP server connected to the PostgreSQL database. The request specifies the tool to be used, such as get_customer_orders, and includes the necessary parameters: 

{
  "jsonrpc": "2.0",
  "method": "db_tools.get_customer_orders",
  "params": {
    "customer_name": "Priyanka Chopra Jonas",
    "sort_by": "order_date",
    "sort_order": "desc",
    "limit": 1
  },
  "id": "12345"
}

4. Server handles the request: The MCP server receives the request and performs several key functions: 

  • Authentication and authorization: The server verifies that the AI client and the user have permission to query the database.
  • Query translation: The server translates the standardized MCP request into a specific SQL query for the PostgreSQL database.
  • Query execution: The server executes the SQL query against the database.
SELECT order_id, order_date, total_amount
FROM orders
WHERE customer_name = 'Priyanka Chopra Jonas'
ORDER BY order_date DESC
LIMIT 1;

5. Database returns data: The PostgreSQL database executes the query and returns the requested data to the MCP server. 

6. Server formats the response: The MCP server receives the raw database output and formats it into a standardized JSON response that the MCP client can understand.

{
  "jsonrpc": "2.0",
  "result": {
    "data": [
      {
        "order_id": "98765",
        "order_date": "2025-08-25",
        "total_amount": 11025.50
      }
    ]
  },
  "id": "12345"
}

7. Client returns data to the model: The MCP client receives the JSON response and passes it back to the AI assistant’s language model. 

8. AI model generates final response: The language model incorporates this real-time data into its response and presents it to the user in a natural, conversational format. 

“Priyanka Chopra Jonas’s most recent order was placed on August 25, 2025, with an order ID of 98765, for a total of $11025.50.”

Using the Model Context Protocol (MCP) for database access introduces a layer of abstraction that affects performance in several ways. While it adds some latency and processing overhead, strategic implementation can mitigate these effects. For AI applications, the benefits often outweigh the costs, particularly in terms of improved accuracy, security, and scalability.

The MCP architecture introduces extra communication steps between the AI agent and the database, each adding a small amount of latency. 

  • RPC overhead: The JSON-RPC call from the AI’s client to the MCP server adds a small processing and network delay. This is an out-of-process request, as opposed to a simple local function call.
  • JSON serialization: Request and response data must be serialized and deserialized into JSON format, which requires processing time.
  • Network transit: For remote MCP servers, the data must travel over the network, adding latency. However, for a local or on-premise setup, this is minimal. The physical location of the MCP server relative to the AI model and the database is a significant factor.

The performance impact scales with the complexity and volume of the AI agent’s interactions. 

  • High request volume: A single AI agent working on a complex task might issue dozens of parallel database queries. In high-traffic scenarios, managing numerous simultaneous connections can strain system resources and require robust infrastructure.
  • Excessive data retrieval: A significant performance risk is an AI agent retrieving a massive dataset in a single query. This process can consume a large number of tokens, fill the AI’s context window, and cause bottlenecks at the database and client levels.
  • Context window usage: Tool definitions and the results of tool calls consume space in the AI’s context window. If a large number of tools are in use, this can limit the AI’s “working memory,” resulting in slower and less effective reasoning. 

Caching is a crucial strategy for mitigating the performance overhead of MCP. 

  • In-memory caching: The MCP server can cache results from frequent or expensive database queries in memory (e.g., using Redis or Memcached). This approach enables repeat requests to be served almost instantly without requiring a database hit.
  • Semantic caching: Advanced techniques can cache the results of previous queries and serve them for semantically similar future requests, reducing token consumption and improving speed for conversational applications. 

Designing the MCP server and its database interactions for efficiency is critical. 

  • Optimized SQL: The MCP server should generate optimized SQL queries. Database indexes should be utilized effectively to expedite lookups and minimize load.
  • Pagination and filtering: To prevent a single query from overwhelming the system, the MCP server should implement pagination. The AI agent can be prompted to use filtering parameters to retrieve only the necessary data.
  • Connection pooling: This technique reuses existing database connections instead of opening a new one for each request, thereby reducing latency and database load. 

For large-scale enterprise deployments, scaling is essential for maintaining performance. 

  • Multiple servers: The workload can be distributed across various MCP servers. One server could handle read requests, and another could handle writes.
  • Load balancing: A reverse proxy or other load-balancing solution can distribute incoming traffic across MCP server instances. Autoscaling can dynamically add or remove servers in response to demand.

For AI-driven tasks, a slight increase in latency for database access is often a worthwhile trade-off for significant gains. 

  • Improved accuracy: Accessing real-time, high-quality data through MCP leads to more accurate and relevant AI responses, reducing “hallucinations”.
  • Scalable ecosystem: The standardization of MCP reduces development overhead and allows for a more modular, scalable ecosystem, which saves significant engineering resources compared to building custom integrations.
  • Decoupled architecture: The MCP server decouples the AI model from the database, allowing each to be optimized and scaled independently. 

We’ll go ahead and conclude this post here & continue discussing on a further deep dive in the next post.

Till then, Happy Avenging! 🙂

Agentic AI in the Enterprise: Strategy, Architecture, and Implementation – Part 1

Today, we won’t be discussing any solutions. Today, we’ll be discussing the Agentic AI & its implementation in the Enterprise landscape in a series of upcoming posts.

So, hang tight! We’re about to launch a new venture as part of our knowledge drive.

Agentic AI refers to artificial intelligence systems that can act autonomously to achieve goals, making decisions and taking actions without constant human oversight. Unlike traditional AI, which responds to prompts, agentic AI can plan, reason about next steps, utilize tools, and work toward objectives over extended periods of time.

Key characteristics of agentic AI include:

  • Autonomy and Goal-Directed Behavior: These systems can pursue objectives independently, breaking down complex tasks into smaller steps and executing them sequentially.
  • Tool Use and Environment Interaction: Agentic AI can interact with external systems, APIs, databases, and software tools to gather information and perform actions in the real world.
  • Planning and Reasoning: They can develop multi-step strategies, adapt their approach based on feedback, and reason through problems to find solutions.
  • Persistence: Unlike single-interaction AI, agentic systems can maintain context and continue working on tasks across multiple interactions or sessions.
  • Decision Making: They can evaluate options, weigh trade-offs, and make choices about how to proceed when faced with uncertainty.

Agentic AI systems have several interconnected components that work together to enable intelligent behaviour. Each element plays a crucial role in the overall functioning of the AI system, and they must interact seamlessly to achieve desired outcomes. Let’s explore each of these components in more detail.

The sensing module serves as the AI’s eyes and ears, enabling it to understand its surroundings and make informed decisions. Think of it as the system that helps the AI “see” and “hear” the world around it, much like how humans use their senses.

  • Gathering Information: The system collects data from multiple sources, including cameras for visual information, microphones for audio, sensors for physical touch, and digital systems for data. This step provides the AI with a comprehensive understanding of what’s happening.
  • Making Sense of Data: Raw information from sensors can be messy and overwhelming. This component processes the data to identify the essential patterns and details that actually matter for making informed decisions.
  • Recognizing What’s Important: Utilizing advanced techniques such as computer vision (for images), natural language processing (for text and speech), and machine learning (for data patterns), the system identifies and understands objects, people, events, and situations within the environment.

This sensing capability enables AI systems to transition from merely following pre-programmed instructions to genuinely understanding their environment and making informed decisions based on real-world conditions. It’s the difference between a basic automated system and an intelligent agent that can adapt to changing situations.

The observation module serves as the AI’s decision-making center, where it sets objectives, develops strategies, and selects the most effective actions to take. This step is where the AI transforms what it perceives into purposeful action, much like humans think through problems and devise plans.

  • Setting Clear Objectives: The system establishes specific goals and desired outcomes, giving the AI a clear sense of direction and purpose. This approach helps ensure all actions are working toward meaningful results rather than random activity.
  • Strategic Planning: Using information about its own capabilities and the current situation, the AI creates step-by-step plans to reach its goals. It considers potential obstacles, available resources, and different approaches to find the most effective path forward.
  • Intelligent Decision-Making: When faced with multiple options, the system evaluates each choice against the current circumstances, established goals, and potential outcomes. It then selects the action most likely to move the AI closer to achieving its objectives.

This observation capability is what transforms an AI from a simple tool that follows commands into an intelligent system that can work independently toward business goals. It enables the AI to handle complex, multi-step tasks and adapt its approach when conditions change, making it valuable for a wide range of applications, from customer service to project management.

The action module serves as the AI’s hands and voice, turning decisions into real-world results. This step is where the AI actually puts its thinking and planning into action, carrying out tasks that make a tangible difference in the environment.

  • Control Systems: The system utilizes various tools to interact with the world, including motors for physical movement, speakers for communication, network connections for digital tasks, and software interfaces for system operation. These serve as the AI’s means of reaching out and making adjustments.
  • Task Implementation: Once the cognitive module determines the action to take, this component executes the actual task. Whether it’s sending an email, moving a robotic arm, updating a database, or scheduling a meeting, this module handles the execution from start to finish.

This action capability is what makes AI systems truly useful in business environments. Without it, an AI could analyze data and make significant decisions, but it couldn’t help solve problems or complete tasks. The action module bridges the gap between artificial intelligence and real-world impact, enabling AI to automate processes, respond to customers, manage systems, and deliver measurable business value.

Technology that is primarily involved in the Agentic AI is as follows –

1. Machine Learning
2. Deep Learning
3. Computer Vision
4. Natural Language Processing (NLP)
5. Planning and Decision-Making
6. Uncertainty and Reasoning
7. Simulation and Modeling

In an enterprise setting, agentic AI systems utilize the Model Context Protocol (MCP) and the Agent-to-Agent (A2A) protocol as complementary, open standards to achieve autonomous, coordinated, and secure workflows. An MCP-enabled agent gains the ability to access and manipulate enterprise tools and data. At the same time, A2A allows a network of these agents to collaborate on complex tasks by delegating and exchanging information.

This combined approach allows enterprises to move from isolated AI experiments to strategic, scalable, and secure AI programs.

ProtocolFunction in Agentic AIFocusExample use case
Model Context Protocol (MCP)Equips a single AI agent with the tools and data it needs to perform a specific job.Vertical integration: connecting agents to enterprise systems like databases, CRMs, and APIs.A sales agent uses MCP to query the company CRM for a client’s recent purchase history.
Agent-to-Agent (A2A)Enables multiple specialized agents to communicate, delegate tasks, and collaborate on a larger, multi-step goal.Horizontal collaboration: allowing agents from different domains to work together seamlessly.An orchestrating agent uses A2A to delegate parts of a complex workflow to specialized HR, IT, and sales agents.
  • End-to-end automation: Agents can handle tasks from start to finish, including complex, multi-step workflows, autonomously.
  • Greater agility and speed: Enterprise-wide adoption of these protocols reduces the cost and complexity of integrating AI, accelerating deployment timelines for new applications.
  • Enhanced security and governance: Enterprise AI platforms built on these open standards incorporate robust security policies, centralized access controls, and comprehensive audit trails.
  • Vendor neutrality and interoperability: As open standards, MCP and A2A allow AI agents to work together seamlessly, regardless of the underlying vendor or platform.
  • Adaptive problem-solving: Agents can dynamically adjust their strategies and collaborate based on real-time data and contextual changes, leading to more resilient and efficient systems.

We will discuss this topic further in our upcoming posts.

Till then, Happy Avenging! 🙂

Enable OpenAI chatbot with the selected YouTube video content using LangChain, FAISS & YouTube data-API.

Today, I’m very excited to demonstrate an effortless & new way to extract the transcript from YouTube videos & then answer the questions based on the topics selected by the users. In this post, I plan to deal with the user inputs to consider the case first & then it can summarize the video content through useful advanced analytics with the help of the LangChain & OpenAI-based model.

In this post, I’ve directly subscribed to OpenAI & I’m not using OpenAI from Azure. However, I’ll explore that in the future as well.
Before I explain the process to invoke this new library, why not view the demo first & then discuss it?

Demo

Isn’t it very exciting? This will lead to a whole new ballgame, where one can get critical decision-making information from these human sources along with their traditional advanced analytical data.

How will it help?

Let’s say as per your historical data & analytics, the dashboard is recommending prod-A, prod-B & prod-C as the top three products for potential top-performing brands. Whereas, you are getting some alerts from the TV news on prod-B due to the recent incidents. So, in that case, you don’t want to continue with the prod-B investment. You may find a new product named prod-Z. That may reduce the risk of your investment.


What is LangChain?

LangChain is a framework for developing applications powered by language models. We believe that the most powerful and differentiated applications will not only call out to a language model but will also be:

  1. Data-aware: connect a language model to other sources of data
  2. Agentic: allow a language model to interact with its environment

The LangChain framework works around these principles.

To know more about this, please click the following link.

As you can see, this is one of the critical components in our solution, which will bind the OpenAI bot & it will feed the necessary data to provide the correct response.


What is FAISS?

Faiss is a library for efficient similarity search and clustering of dense vectors. It contains algorithms that search in sets of vectors of any size, up to ones that do not fit in RAM. It also has supporting code for evaluation and parameter tuning.

Faiss developed using C++ with complete wrappers for Python—some of the most beneficial algorithms available both on CPU & in GPU as well. Facebook AI Research develops it.

To know more about this, please click the following link.


FLOW OF EVENTS:

Let us look at the flow diagram as it captures the sequence of events that unfold as part of the process.

Here are the steps that will follow in sequence –

  • The application will first get the topic on which it needs to look from YouTube & find the top 5 videos using the YouTube data-API.
  • Once the application returns a list of websites from the above step, LangChain will drive the application will extract the transcripts from the video & then optimize the response size in smaller chunks to address the costly OpenAI calls. During this time, it will invoke FAISS to create document DBs.
  • Finally, it will send those chunks to OpenAI for the best response based on your supplied template that performs the final analysis with small data required for your query & gets the appropriate response with fewer costs.

CODE:

Why don’t we go through the code made accessible due to this new library for this particular use case?

  • clsConfigClient.py (This is the main calling Python script for the input parameters.)


################################################
#### Written By: SATYAKI DE ####
#### Written On: 15-May-2020 ####
#### Modified On: 28-May-2023 ####
#### ####
#### Objective: This script is a config ####
#### file, contains all the keys for ####
#### personal OpenAI-based video content ####
#### enable bot. ####
#### ####
################################################
import os
import platform as pl
class clsConfigClient(object):
Curr_Path = os.path.dirname(os.path.realpath(__file__))
os_det = pl.system()
if os_det == "Windows":
sep = '\\'
else:
sep = '/'
conf = {
'APP_ID': 1,
'ARCH_DIR': Curr_Path + sep + 'arch' + sep,
'PROFILE_PATH': Curr_Path + sep + 'profile' + sep,
'LOG_PATH': Curr_Path + sep + 'log' + sep,
'DATA_PATH': Curr_Path + sep + 'data' + sep,
'MODEL_PATH': Curr_Path + sep + 'model' + sep,
'TEMP_PATH': Curr_Path + sep + 'temp' + sep,
'MODEL_DIR': 'model',
'APP_DESC_1': 'LangChain Demo!',
'DEBUG_IND': 'N',
'INIT_PATH': Curr_Path,
'FILE_NAME': 'Output.csv',
'MODEL_NAME': 'gpt-3.5-turbo',
'OPEN_AI_KEY': "sk-kfrjfijdrkidjkfjd9474nbfjfkfjfhfhf84i84hnfhjdbv6Bgvv",
'YOUTUBE_KEY': "AIjfjfUYGe64hHJ-LOFO5u-mkso9pPOJGFU",
'TITLE': "LangChain Demo!",
'TEMP_VAL': 0.2,
'PATH' : Curr_Path,
'MAX_CNT' : 5,
'OUT_DIR': 'data'
}

Some of the key entries from the above scripts are as follows –

'MODEL_NAME': 'gpt-3.5-turbo',
'OPEN_AI_KEY': "sk-kfrjfijdrkidjkfjd9474nbfjfkfjfhfhf84i84hnfhjdbv6Bgvv",
'YOUTUBE_KEY': "AIjfjfUYGe64hHJ-LOFO5u-mkso9pPOJGFU",
'TEMP_VAL': 0.2,

From the above code snippet, one can understand that we need both the API keys for YouTube & OpenAI. And they have separate costs & usage, which I’ll share later in the post. Also, notice that the temperature sets to 0.2 ( range between 0 to 1). That means our AI bot will be consistent in response. And our application will use the GPT-3.5-turbo model for its analytic response.

  • clsTemplate.py (Contains all the templates for OpenAI.)


################################################
#### Written By: SATYAKI DE ####
#### Written On: 27-May-2023 ####
#### Modified On: 28-May-2023 ####
#### ####
#### Objective: This script is a config ####
#### file, contains all the template for ####
#### OpenAI prompts to get the correct ####
#### response. ####
#### ####
################################################
# Template to use for the system message prompt
templateVal_1 = """
You are a helpful assistant that that can answer questions about youtube videos
based on the video's transcript: {docs}
Only use the factual information from the transcript to answer the question.
If you feel like you don't have enough information to answer the question, say "I don't know".
Your answers should be verbose and detailed.
"""

view raw

clsTemplate.py

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The above code is self-explanatory. Here, we’re keeping the correct instructions for our OpenAI to respond within these guidelines.

  • clsVideoContentScrapper.py (Main class to extract the transcript from the YouTube videos & then answer the questions based on the topics selected by the users.)


#####################################################
#### Written By: SATYAKI DE ####
#### Written On: 27-May-2023 ####
#### Modified On 28-May-2023 ####
#### ####
#### Objective: This is the main calling ####
#### python class that will invoke the ####
#### LangChain of package to extract ####
#### the transcript from the YouTube videos & ####
#### then answer the questions based on the ####
#### topics selected by the users. ####
#### ####
#####################################################
from langchain.document_loaders import YoutubeLoader
from langchain.text_splitter import RecursiveCharacterTextSplitter
from langchain.embeddings.openai import OpenAIEmbeddings
from langchain.vectorstores import FAISS
from langchain.chat_models import ChatOpenAI
from langchain.chains import LLMChain
from langchain.prompts.chat import (
ChatPromptTemplate,
SystemMessagePromptTemplate,
HumanMessagePromptTemplate,
)
from googleapiclient.discovery import build
import clsTemplate as ct
from clsConfigClient import clsConfigClient as cf
import os
###############################################
### Global Section ###
###############################################
open_ai_Key = cf.conf['OPEN_AI_KEY']
os.environ["OPENAI_API_KEY"] = open_ai_Key
embeddings = OpenAIEmbeddings(openai_api_key=open_ai_Key)
YouTube_Key = cf.conf['YOUTUBE_KEY']
youtube = build('youtube', 'v3', developerKey=YouTube_Key)
# Disbling Warning
def warn(*args, **kwargs):
pass
import warnings
warnings.warn = warn
###############################################
### End of Global Section ###
###############################################
class clsVideoContentScrapper:
def __init__(self):
self.model_name = cf.conf['MODEL_NAME']
self.temp_val = cf.conf['TEMP_VAL']
self.max_cnt = int(cf.conf['MAX_CNT'])
def createDBFromYoutubeVideoUrl(self, video_url):
try:
loader = YoutubeLoader.from_youtube_url(video_url)
transcript = loader.load()
text_splitter = RecursiveCharacterTextSplitter(chunk_size=1000, chunk_overlap=100)
docs = text_splitter.split_documents(transcript)
db = FAISS.from_documents(docs, embeddings)
return db
except Exception as e:
x = str(e)
print('Error: ', x)
return ''
def getResponseFromQuery(self, db, query, k=4):
try:
"""
gpt-3.5-turbo can handle up to 4097 tokens. Setting the chunksize to 1000 and k to 4 maximizes
the number of tokens to analyze.
"""
mod_name = self.model_name
temp_val = self.temp_val
docs = db.similarity_search(query, k=k)
docs_page_content = " ".join([d.page_content for d in docs])
chat = ChatOpenAI(model_name=mod_name, temperature=temp_val)
# Template to use for the system message prompt
template = ct.templateVal_1
system_message_prompt = SystemMessagePromptTemplate.from_template(template)
# Human question prompt
human_template = "Answer the following question: {question}"
human_message_prompt = HumanMessagePromptTemplate.from_template(human_template)
chat_prompt = ChatPromptTemplate.from_messages(
[system_message_prompt, human_message_prompt]
)
chain = LLMChain(llm=chat, prompt=chat_prompt)
response = chain.run(question=query, docs=docs_page_content)
response = response.replace("\n", "")
return response, docs
except Exception as e:
x = str(e)
print('Error: ', x)
return '', ''
def topFiveURLFromYouTube(self, service, **kwargs):
try:
video_urls = []
channel_list = []
results = service.search().list(**kwargs).execute()
for item in results['items']:
print("Title: ", item['snippet']['title'])
print("Description: ", item['snippet']['description'])
channel = item['snippet']['channelId']
print("Channel Id: ", channel)
# Fetch the channel name using the channel ID
channel_response = service.channels().list(part='snippet',id=item['snippet']['channelId']).execute()
channel_title = channel_response['items'][0]['snippet']['title']
print("Channel Title: ", channel_title)
channel_list.append(channel_title)
print("Video Id: ", item['id']['videoId'])
vidURL = "https://www.youtube.com/watch?v=" + item['id']['videoId']
print("Video URL: " + vidURL)
video_urls.append(vidURL)
print("\n")
return video_urls, channel_list
except Exception as e:
video_urls = []
channel_list = []
x = str(e)
print('Error: ', x)
return video_urls, channel_list
def extractContentInText(self, topic, query):
try:
discussedTopic = []
strKeyText = ''
cnt = 0
max_cnt = self.max_cnt
urlList, channelList = self.topFiveURLFromYouTube(youtube, q=topic, part='id,snippet',maxResults=max_cnt,type='video')
print('Returned List: ')
print(urlList)
print()
for video_url in urlList:
print('Processing Video: ')
print(video_url)
db = self.createDBFromYoutubeVideoUrl(video_url)
response, docs = self.getResponseFromQuery(db, query)
if len(response) > 0:
strKeyText = 'As per the topic discussed in ' + channelList[cnt] + ', '
discussedTopic.append(strKeyText + response)
cnt += 1
return discussedTopic
except Exception as e:
discussedTopic = []
x = str(e)
print('Error: ', x)
return discussedTopic

Let us understand the key methods step by step in detail –

def topFiveURLFromYouTube(self, service, **kwargs):
    try:
        video_urls = []
        channel_list = []
        results = service.search().list(**kwargs).execute()

        for item in results['items']:
            print("Title: ", item['snippet']['title'])
            print("Description: ", item['snippet']['description'])
            channel = item['snippet']['channelId']
            print("Channel Id: ", channel)

            # Fetch the channel name using the channel ID
            channel_response = service.channels().list(part='snippet',id=item['snippet']['channelId']).execute()
            channel_title = channel_response['items'][0]['snippet']['title']
            print("Channel Title: ", channel_title)
            channel_list.append(channel_title)

            print("Video Id: ", item['id']['videoId'])
            vidURL = "https://www.youtube.com/watch?v=" + item['id']['videoId']
            print("Video URL: " + vidURL)
            video_urls.append(vidURL)
            print("\n")

        return video_urls, channel_list

    except Exception as e:
        video_urls = []
        channel_list = []
        x = str(e)
        print('Error: ', x)

        return video_urls, channel_list

The above code will fetch the most relevant YouTube URLs & bind them into a list along with the channel names & then share the lists with the main functions.

def createDBFromYoutubeVideoUrl(self, video_url):
    try:
        loader = YoutubeLoader.from_youtube_url(video_url)
        transcript = loader.load()

        text_splitter = RecursiveCharacterTextSplitter(chunk_size=1000, chunk_overlap=100)
        docs = text_splitter.split_documents(transcript)

        db = FAISS.from_documents(docs, embeddings)
        return db

    except Exception as e:
        x = str(e)
        print('Error: ', x)
        return ''

The provided Python code defines a function createDBFromYoutubeVideoUrl which appears to create a database of text documents from the transcript of a YouTube video. Here’s the explanation in simple English:

  1. The function createDBFromYoutubeVideoUrl has defined with one argument: video_url.
  2. The function uses a try-except block to handle any potential exceptions or errors that may occur.
  3. Inside the try block, the following steps are going to perform:
  • First, it creates a YoutubeLoader object from the provided video_url. This object is likely responsible for interacting with the YouTube video specified by the URL.
  • The loader object then loads the transcript of the video. This object is the text version of everything spoken in the video.
  • It then creates a RecursiveCharacterTextSplitter object with a specified chunk_size of 1000 and chunk_overlap of 100. This object may split the transcript into smaller chunks (documents) of text for easier processing or analysis. Each piece will be around 1000 characters long, and there will overlap of 100 characters between consecutive chunks.
  • The split_documents method of the text_splitter object will split the transcript into smaller documents. These documents are stored in the docs variable.
  • The FAISS.from_documents method is then called with docs and embeddings as arguments to create a FAISS (Facebook AI Similarity Search) index. This index is a database used for efficient similarity search and clustering of high-dimensional vectors, which in this case, are the embeddings of the documents. The FAISS index is stored in the db variable.
  • Finally, the db variable is returned, representing the created database from the video transcript.

4. If an exception occurs during the execution of the try block, the code execution moves to the except block:

  • Here, it first converts the exception e to a string x.
  • Then it prints an error message.
  • Finally, it returns an empty string as an indication of the error.

def getResponseFromQuery(self, db, query, k=4):
      try:
          """
          gpt-3.5-turbo can handle up to 4097 tokens. Setting the chunksize to 1000 and k to 4 maximizes
          the number of tokens to analyze.
          """

          mod_name = self.model_name
          temp_val = self.temp_val

          docs = db.similarity_search(query, k=k)
          docs_page_content = " ".join([d.page_content for d in docs])

          chat = ChatOpenAI(model_name=mod_name, temperature=temp_val)

          # Template to use for the system message prompt
          template = ct.templateVal_1

          system_message_prompt = SystemMessagePromptTemplate.from_template(template)

          # Human question prompt
          human_template = "Answer the following question: {question}"
          human_message_prompt = HumanMessagePromptTemplate.from_template(human_template)

          chat_prompt = ChatPromptTemplate.from_messages(
              [system_message_prompt, human_message_prompt]
          )

          chain = LLMChain(llm=chat, prompt=chat_prompt)

          response = chain.run(question=query, docs=docs_page_content)
          response = response.replace("\n", "")
          return response, docs

      except Exception as e:
          x = str(e)
          print('Error: ', x)

          return '', ''

The Python function getResponseFromQuery is designed to search a given database (db) for a specific query and then generate a response using a language model (possibly GPT-3.5-turbo). The answer is based on the content found and the particular question. Here is a simple English summary:

  1. The function getResponseFromQuery takes three parameters: db, query, and k. The k parameter is optional and defaults to 4 if not provided. db is the database to search, the query is the question or prompts to analyze, and k is the number of similar items to return.
  2. The function initiates a try-except block for handling any errors that might occur.
  3. Inside the try block:
  • The function retrieves the model name and temperature value from the instance of the class this function is a part of.
  • The function then searches the db database for documents similar to the query and saves these in docs.
  • It concatenates the content of the returned documents into a single string docs_page_content.
  • It creates a ChatOpenAI object with the model name and temperature value.
  • It creates a system message prompt from a predefined template.
  • It creates a human message prompt, which is the query.
  • It combines these two prompts to form a chat prompt.
  • An LLMChain object is then created using the ChatOpenAI object and the chat prompt.
  • This LLMChain object is used to generate a response to the query using the content of the documents found in the database. The answer is then formatted by replacing all newline characters with empty strings.
  • Finally, the function returns this response along with the original documents.
  1. If any error occurs during these operations, the function goes to the except block where:
  • The error message is printed.
  • The function returns two empty strings to indicate an error occurred, and no response or documents could be produced.

def extractContentInText(self, topic, query):
    try:
        discussedTopic = []
        strKeyText = ''
        cnt = 0
        max_cnt = self.max_cnt

        urlList, channelList = self.topFiveURLFromYouTube(youtube, q=topic, part='id,snippet',maxResults=max_cnt,type='video')
        print('Returned List: ')
        print(urlList)
        print()

        for video_url in urlList:
            print('Processing Video: ')
            print(video_url)
            db = self.createDBFromYoutubeVideoUrl(video_url)

            response, docs = self.getResponseFromQuery(db, query)

            if len(response) > 0:
                strKeyText = 'As per the topic discussed in ' + channelList[cnt] + ', '
                discussedTopic.append(strKeyText + response)

            cnt += 1

        return discussedTopic
    except Exception as e:
        discussedTopic = []
        x = str(e)
        print('Error: ', x)

        return discussedTopic

This Python function, extractContentInText, is aimed to extract relevant content from the transcripts of top YouTube videos on a specific topic and generate responses to a given query. Here’s a simple English translation:

  1. The function extractContentInText is defined with topic and query as parameters.
  2. It begins with a try-except block to catch and handle any possible exceptions.
  3. In the try block:
  • It initializes several variables: an empty list discussedTopic to store the extracted information, an empty string strKeyText to keep specific parts of the content, a counter cnt initialized at 0, and max_cnt retrieved from the self-object to specify the maximum number of YouTube videos to consider.
  • It calls the topFiveURLFromYouTube function (defined previously) to get the URLs of the top videos on the given topic from YouTube. It also retrieves the list of channel names associated with these videos.
  • It prints the returned list of URLs.
  • Then, it starts a loop over each URL in the urlList.
    • For each URL, it prints the URL, then creates a database from the transcript of the YouTube video using the function createDBFromYoutubeVideoUrl.
    • It then uses the getResponseFromQuery function to get a response to the query based on the content of the database.
    • If the length of the response is greater than 0 (meaning there is a response), it forms a string strKeyText to indicate the channel that the topic was discussed on and then appends the answer to this string. This entire string is then added to the discussedTopic list.
    • It increments the counter cnt by one after each iteration.
    • Finally, it returns the discussedTopic list, which now contains relevant content extracted from the videos.
  1. If any error occurs during these operations, the function goes into the except block:
  • It first resets discussedTopic to an empty list.
  • Then it converts the exception e to a string and prints the error message.
  • Lastly, it returns the empty discussedTopic list, indicating that no content could be extracted due to the error.
  • testLangChain.py (Main Python script to extract the transcript from the YouTube videos & then answer the questions based on the topics selected by the users.)


#####################################################
#### Written By: SATYAKI DE ####
#### Written On: 27-May-2023 ####
#### Modified On 28-May-2023 ####
#### ####
#### Objective: This is the main calling ####
#### python script that will invoke the ####
#### clsVideoContentScrapper class to extract ####
#### the transcript from the YouTube videos. ####
#### ####
#####################################################
import clsL as cl
from clsConfigClient import clsConfigClient as cf
import datetime
import textwrap
import clsVideoContentScrapper as cvsc
# Disbling Warning
def warn(*args, **kwargs):
pass
import warnings
warnings.warn = warn
######################################
### Get your global values ####
######################################
debug_ind = 'Y'
# Initiating Logging Instances
clog = cl.clsL()
data_path = cf.conf['DATA_PATH']
data_file_name = cf.conf['FILE_NAME']
cVCScrapper = cvsc.clsVideoContentScrapper()
######################################
#### Global Flag ########
######################################
def main():
try:
var = datetime.datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
print('*'*120)
print('Start Time: ' + str(var))
print('*'*120)
#query = "What are they saying about Microsoft?"
print('Please share your topic!')
inputTopic = input('User: ')
print('Please ask your questions?')
inputQry = input('User: ')
print()
retList = cVCScrapper.extractContentInText(inputTopic, inputQry)
cnt = 0
for discussedTopic in retList:
finText = str(cnt + 1) + ') ' + discussedTopic
print()
print(textwrap.fill(finText, width=150))
cnt += 1
r1 = len(retList)
if r1 > 0:
print()
print('Successfully Scrapped!')
else:
print()
print('Failed to Scrappe!')
print('*'*120)
var1 = datetime.datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
print('End Time: ' + str(var1))
except Exception as e:
x = str(e)
print('Error: ', x)
if __name__ == "__main__":
main()

Please find the key snippet –

def main():
    try:
        var = datetime.datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
        print('*'*120)
        print('Start Time: ' + str(var))
        print('*'*120)

        #query = "What are they saying about Microsoft?"
        print('Please share your topic!')
        inputTopic = input('User: ')
        print('Please ask your questions?')
        inputQry = input('User: ')
        print()

        retList = cVCScrapper.extractContentInText(inputTopic, inputQry)
        cnt = 0

        for discussedTopic in retList:
            finText = str(cnt + 1) + ') ' + discussedTopic
            print()
            print(textwrap.fill(finText, width=150))

            cnt += 1

        r1 = len(retList)

        if r1 > 0:
            print()
            print('Successfully Scrapped!')
        else:
            print()
            print('Failed to Scrappe!')

        print('*'*120)
        var1 = datetime.datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
        print('End Time: ' + str(var1))

    except Exception as e:
        x = str(e)
        print('Error: ', x)

if __name__ == "__main__":
    main()

The above main application will capture the topics from the user & then will give the user a chance to ask specific questions on the topics, invoking the main class to extract the transcript from YouTube & then feed it as a source using ChainLang & finally deliver the response. If there is no response, then it will skip the overall options.

USAGE & COST FACTOR:

Please find the OpenAI usage –

Please find the YouTube API usage –


So, finally, we’ve done it.

I know that this post is relatively bigger than my earlier post. But, I think, you can get all the details once you go through it.

You will get the complete codebase in the following GitHub link.

I’ll bring some more exciting topics in the coming days from the Python verse. Please share & subscribe to my post & let me know your feedback.

Till then, Happy Avenging! 🙂

Note: All the data & scenarios posted here are representational data & scenarios & available over the internet & for educational purposes only. Some of the images (except my photo) we’ve used are available over the net. We don’t claim ownership of these images. There is always room for improvement & especially in the prediction quality. Sample video taken from Santrel Media & you would find the link over here.

Detecting real-time human emotions using Open-CV, DeepFace & Python

Hi Guys,

Today, I’ll be using another exciting installment of Computer Vision. Our focus will be on getting a sense of human emotions. Let me explain. This post will demonstrate how to read/detect human emotions by analyzing computer vision videos. We will be using part of a Bengali Movie called “Ganashatru (An enemy of the people)” entirely for educational purposes & also as a tribute to the great legendary director late Satyajit Roy. To know more about him, please click the following link.

Why don’t we see the demo first before jumping into the technical details?

Demo

Architecture:

Let us understand the architecture –

Process Flow

From the above diagram, one can see that the application, which uses both the Open-CV & DeepFace, analyzes individual frames from the source. Then predicts the emotions & adds the label in the target B&W frames. Finally, it creates another video by correctly mixing the source audio.

Python Packages:

Following are the python packages that are necessary to develop this brilliant use case –

pip install deepface
pip install opencv-python
pip install ffpyplayer

CODE:

Let us now understand the code. For this use case, we will only discuss three python scripts. However, we need more than these three. However, we have already discussed them in some of the early posts. Hence, we will skip them here.

  • clsConfig.py (This script will play the video along with audio in sync.)


################################################
#### Written By: SATYAKI DE ####
#### Written On: 15-May-2020 ####
#### Modified On: 22-Apr-2022 ####
#### ####
#### Objective: This script is a config ####
#### file, contains all the keys for ####
#### Machine-Learning & streaming dashboard.####
#### ####
################################################
import os
import platform as pl
class clsConfig(object):
Curr_Path = os.path.dirname(os.path.realpath(__file__))
os_det = pl.system()
if os_det == "Windows":
sep = '\\'
else:
sep = '/'
conf = {
'APP_ID': 1,
'ARCH_DIR': Curr_Path + sep + 'arch' + sep,
'PROFILE_PATH': Curr_Path + sep + 'profile' + sep,
'LOG_PATH': Curr_Path + sep + 'log' + sep,
'REPORT_PATH': Curr_Path + sep + 'report',
'FILE_NAME': 'GonoshotruClimax',
'SRC_PATH': Curr_Path + sep + 'data' + sep,
'FINAL_PATH': Curr_Path + sep + 'Target' + sep,
'APP_DESC_1': 'Video Emotion Capture!',
'DEBUG_IND': 'N',
'INIT_PATH': Curr_Path,
'SUBDIR': 'data',
'SEP': sep,
'VIDEO_FILE_EXTN': '.mp4',
'AUDIO_FILE_EXTN': '.mp3',
'IMAGE_FILE_EXTN': '.jpg',
'TITLE': "Gonoshotru – Emotional Analysis"
}

view raw

clsConfig.py

hosted with ❤ by GitHub

All the above inputs are generic & used as normal parameters.

  • clsFaceEmotionDetect.py (This python class will track the human emotions after splitting the audio from the video & put that label on top of the video frame.)


##################################################
#### Written By: SATYAKI DE ####
#### Written On: 17-Apr-2022 ####
#### Modified On 20-Apr-2022 ####
#### ####
#### Objective: This python class will ####
#### track the human emotions after splitting ####
#### the audio from the video & put that ####
#### label on top of the video frame. ####
#### ####
##################################################
from imutils.video import FileVideoStream
from imutils.video import FPS
import numpy as np
import imutils
import time
import cv2
from clsConfig import clsConfig as cf
from deepface import DeepFace
import clsL as cl
import subprocess
import sys
import os
# Initiating Log class
l = cl.clsL()
class clsFaceEmotionDetect:
def __init__(self):
self.sep = str(cf.conf['SEP'])
self.Curr_Path = str(cf.conf['INIT_PATH'])
self.FileName = str(cf.conf['FILE_NAME'])
self.VideoFileExtn = str(cf.conf['VIDEO_FILE_EXTN'])
self.ImageFileExtn = str(cf.conf['IMAGE_FILE_EXTN'])
def convert_video_to_audio_ffmpeg(self, video_file, output_ext="mp3"):
try:
"""Converts video to audio directly using `ffmpeg` command
with the help of subprocess module"""
filename, ext = os.path.splitext(video_file)
subprocess.call(["ffmpeg", "-y", "-i", video_file, f"{filename}.{output_ext}"],
stdout=subprocess.DEVNULL,
stderr=subprocess.STDOUT)
return 0
except Exception as e:
x = str(e)
print('Error: ', x)
return 1
def readEmotion(self, debugInd, var):
try:
sep = self.sep
Curr_Path = self.Curr_Path
FileName = self.FileName
VideoFileExtn = self.VideoFileExtn
ImageFileExtn = self.ImageFileExtn
font = cv2.FONT_HERSHEY_SIMPLEX
# Load Video
videoFile = Curr_Path + sep + 'Video' + sep + FileName + VideoFileExtn
temp_path = Curr_Path + sep + 'Temp' + sep
# Extracting the audio from the source video
x = self.convert_video_to_audio_ffmpeg(videoFile)
if x == 0:
print('Successfully Audio extracted from the source file!')
else:
print('Failed to extract the source audio!')
# Loading the haarcascade xml class
faceCascade = cv2.CascadeClassifier(cv2.data.haarcascades + 'haarcascade_frontalface_default.xml')
# start the file video stream thread and allow the buffer to
# start to fill
print("[INFO] Starting video file thread…")
fvs = FileVideoStream(videoFile).start()
time.sleep(1.0)
cnt = 0
# start the FPS timer
fps = FPS().start()
try:
# loop over frames from the video file stream
while fvs.more():
cnt += 1
# grab the frame from the threaded video file stream, resize
# it, and convert it to grayscale (while still retaining 3
# channels)
try:
frame = fvs.read()
except Exception as e:
x = str(e)
print('Error: ', x)
frame = imutils.resize(frame, width=720)
cv2.imshow("Gonoshotru – Source", frame)
# Enforce Detection to False will continue the sequence even when there is no face
result = DeepFace.analyze(frame, enforce_detection=False, actions = ['emotion'])
frame = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
frame = np.dstack([frame, frame, frame])
faces = faceCascade.detectMultiScale(image=frame, scaleFactor=1.1, minNeighbors=4, minSize=(80,80), flags=cv2.CASCADE_SCALE_IMAGE)
# Draw a rectangle around the face
for (x, y, w, h) in faces:
cv2.rectangle(frame, (x, y), (x + w, y + h), (0,255,0), 2)
# Use puttext method for inserting live emotion on video
cv2.putText(frame, result['dominant_emotion'], (50,390), font, 3, (0,0,255), 2, cv2.LINE_4)
# display the size of the queue on the frame
#cv2.putText(frame, "Queue Size: {}".format(fvs.Q.qsize()), (10, 30), font, 0.6, (0, 255, 0), 2)
cv2.imwrite(temp_path+'frame-' + str(cnt) + ImageFileExtn, frame)
# show the frame and update the FPS counter
cv2.imshow("Gonoshotru – Emotional Analysis", frame)
fps.update()
if cv2.waitKey(2) & 0xFF == ord('q'):
break
except Exception as e:
x = str(e)
print('Error: ', x)
print('No more frame exists!')
# stop the timer and display FPS information
fps.stop()
print("[INFO] Elasped Time: {:.2f}".format(fps.elapsed()))
print("[INFO] Approx. FPS: {:.2f}".format(fps.fps()))
# do a bit of cleanup
cv2.destroyAllWindows()
fvs.stop()
return 0
except Exception as e:
x = str(e)
print('Error: ', x)
return 1

Key snippets from the above scripts –

def convert_video_to_audio_ffmpeg(self, video_file, output_ext="mp3"):
    try:
        """Converts video to audio directly using `ffmpeg` command
        with the help of subprocess module"""
        filename, ext = os.path.splitext(video_file)
        subprocess.call(["ffmpeg", "-y", "-i", video_file, f"{filename}.{output_ext}"],
                        stdout=subprocess.DEVNULL,
                        stderr=subprocess.STDOUT)

        return 0
    except Exception as e:
        x = str(e)
        print('Error: ', x)

        return 1

The above snippet represents an Audio extraction function that will extract the audio from the source file & store it in the specified directory.

# Loading the haarcascade xml class
faceCascade = cv2.CascadeClassifier(cv2.data.haarcascades + 'haarcascade_frontalface_default.xml')

Now, Loading is one of the best classes for face detection, which our applications require.

fvs = FileVideoStream(videoFile).start()

Using FileVideoStream will enable our application to process the video faster than cv2.VideoCapture() method.

# start the FPS timer
fps = FPS().start()

The application then invokes the FPS.Start() that will initiate the FPS timer.

# loop over frames from the video file stream
while fvs.more():

The application will check using fvs.more() to find the EOF of the video file. Until then, it will try to read individual frames.

try:
    frame = fvs.read()
except Exception as e:
    x = str(e)
    print('Error: ', x)

The application will read individual frames. In case of any issue, it will capture the correct error without terminating the main program at the beginning. This exception strategy is beneficial when there is no longer any frame to read & yet due to the end frame issue, the entire application throws an error.

frame = imutils.resize(frame, width=720)
cv2.imshow("Gonoshotru - Source", frame)

At this point, the application is resizing the frame for better resolution & performance. Furthermore, identify this video feed as a source.

# Enforce Detection to False will continue the sequence even when there is no face
result = DeepFace.analyze(frame, enforce_detection=False, actions = ['emotion'])

Finally, the application has used the deepface machine-learning API to analyze the subject face & trying to predict its emotions.

frame = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
frame = np.dstack([frame, frame, frame])

faces = faceCascade.detectMultiScale(image=frame, scaleFactor=1.1, minNeighbors=4, minSize=(80,80), flags=cv2.CASCADE_SCALE_IMAGE)

detectMultiScale function can use to detect the faces. This function will return a rectangle with coordinates (x, y, w, h) around the detected face.

It takes three common arguments — the input image, scaleFactor, and minNeighbours.

scaleFactor specifies how much the image size reduces with each scale. There may be more faces near the camera in a group photo than others. Naturally, such faces would appear more prominent than the ones behind. This factor compensates for that.

minNeighbours specifies how many neighbors each candidate rectangle should have to retain. One may have to tweak these values to get the best results. This parameter specifies the number of neighbors a rectangle should have to be called a face.

# Draw a rectangle around the face
for (x, y, w, h) in faces:
    cv2.rectangle(frame, (x, y), (x + w, y + h), (0,255,0), 2)

As discussed above, the application is now calculating the square’s boundary after receiving the values of x, y, w, & h.

# Use puttext method for inserting live emotion on video
cv2.putText(frame, result['dominant_emotion'], (50,390), font, 3, (0,0,255), 2, cv2.LINE_4)

Finally, capture the dominant emotion from the deepface API & post it on top of the target video.

# display the size of the queue on the frame
cv2.imwrite(temp_path+'frame-' + str(cnt) + ImageFileExtn, frame)

# show the frame and update the FPS counter
cv2.imshow("Gonoshotru - Emotional Analysis", frame)
fps.update()

Also, writing individual frames into a temporary folder, where later they will be consumed & mixed with the source audio.

if cv2.waitKey(2) & 0xFF == ord('q'):
    break

At any given point, if the user wants to quit, the above snippet will allow them by simply pressing either the escape-button or ‘q’-button from the keyboard.

  • clsVideoPlay.py (This script will play the video along with audio in sync.)


###############################################
#### Updated By: SATYAKI DE ####
#### Updated On: 17-Apr-2022 ####
#### ####
#### Objective: This script will play the ####
#### video along with audio in sync. ####
#### ####
###############################################
import os
import platform as pl
import cv2
import numpy as np
import glob
import re
import ffmpeg
import time
from clsConfig import clsConfig as cf
from ffpyplayer.player import MediaPlayer
import logging
os_det = pl.system()
if os_det == "Windows":
sep = '\\'
else:
sep = '/'
class clsVideoPlay:
def __init__(self):
self.fileNmFin = str(cf.conf['FILE_NAME'])
self.final_path = str(cf.conf['FINAL_PATH'])
self.title = str(cf.conf['TITLE'])
self.VideoFileExtn = str(cf.conf['VIDEO_FILE_EXTN'])
def videoP(self, file):
try:
cap = cv2.VideoCapture(file)
player = MediaPlayer(file)
start_time = time.time()
while cap.isOpened():
ret, frame = cap.read()
if not ret:
break
_, val = player.get_frame(show=False)
if val == 'eof':
break
cv2.imshow(file, frame)
elapsed = (time.time() – start_time) * 1000 # msec
play_time = int(cap.get(cv2.CAP_PROP_POS_MSEC))
sleep = max(1, int(play_time – elapsed))
if cv2.waitKey(sleep) & 0xFF == ord("q"):
break
player.close_player()
cap.release()
cv2.destroyAllWindows()
return 0
except Exception as e:
x = str(e)
print('Error: ', x)
return 1
def stream(self, dInd, var):
try:
VideoFileExtn = self.VideoFileExtn
fileNmFin = self.fileNmFin + VideoFileExtn
final_path = self.final_path
title = self.title
FullFileName = final_path + fileNmFin
ret = self.videoP(FullFileName)
if ret == 0:
print('Successfully Played the Video!')
return 0
else:
return 1
except Exception as e:
x = str(e)
print('Error: ', x)
return 1

view raw

clsVideoPlay.py

hosted with ❤ by GitHub

Let us explore the key snippet –

cap = cv2.VideoCapture(file)
player = MediaPlayer(file)

In the above snippet, the application first reads the video & at the same time, it will create an instance of the MediaPlayer.

play_time = int(cap.get(cv2.CAP_PROP_POS_MSEC))

The application uses cv2.CAP_PROP_POS_MSEC to synchronize video and audio.

  • peopleEmotionRead.py (This is the main calling python script that will invoke the class to initiate the model to read the real-time human emotions from video.)


##################################################
#### Written By: SATYAKI DE ####
#### Written On: 17-Jan-2022 ####
#### Modified On 20-Apr-2022 ####
#### ####
#### Objective: This is the main calling ####
#### python script that will invoke the ####
#### clsFaceEmotionDetect class to initiate ####
#### the model to read the real-time ####
#### human emotions from video or even from ####
#### Web-CAM & predict it continuously. ####
##################################################
# We keep the setup code in a different class as shown below.
import clsFaceEmotionDetect as fed
import clsFrame2Video as fv
import clsVideoPlay as vp
from clsConfig import clsConfig as cf
import datetime
import logging
###############################################
### Global Section ###
###############################################
# Instantiating all the three classes
x1 = fed.clsFaceEmotionDetect()
x2 = fv.clsFrame2Video()
x3 = vp.clsVideoPlay()
###############################################
### End of Global Section ###
###############################################
def main():
try:
# Other useful variables
debugInd = 'Y'
var = datetime.datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
var1 = datetime.datetime.now()
print('Start Time: ', str(var))
# End of useful variables
# Initiating Log Class
general_log_path = str(cf.conf['LOG_PATH'])
# Enabling Logging Info
logging.basicConfig(filename=general_log_path + 'restoreVideo.log', level=logging.INFO)
print('Started Capturing Real-Time Human Emotions!')
# Execute all the pass
r1 = x1.readEmotion(debugInd, var)
r2 = x2.convert2Vid(debugInd, var)
r3 = x3.stream(debugInd, var)
if ((r1 == 0) and (r2 == 0) and (r3 == 0)):
print('Successfully identified human emotions!')
else:
print('Failed to identify the human emotions!')
var2 = datetime.datetime.now()
c = var2 – var1
minutes = c.total_seconds() / 60
print('Total difference in minutes: ', str(minutes))
print('End Time: ', str(var1))
except Exception as e:
x = str(e)
print('Error: ', x)
if __name__ == "__main__":
main()

The key-snippet from the above script are as follows –

# Instantiating all the three classes

x1 = fed.clsFaceEmotionDetect()
x2 = fv.clsFrame2Video()
x3 = vp.clsVideoPlay()

As one can see from the above snippet, all the major classes are instantiated & loaded into the memory.

# Execute all the pass
r1 = x1.readEmotion(debugInd, var)
r2 = x2.convert2Vid(debugInd, var)
r3 = x3.stream(debugInd, var)

All the responses are captured into the corresponding variables, which later check for success status.


Let us capture & compare the emotions in a screenshot for better understanding –

Emotion Analysis

So, one can see that most of the frames from the video & above-posted frame correctly identify the human emotions.


FOLDER STRUCTURE:

Here is the folder structure that contains all the files & directories in MAC O/S –

Directory

So, we’ve done it.

You will get the complete codebase in the following Github link.

If you want to know more about this legendary director & his famous work, please visit the following link.

I’ll bring some more exciting topic in the coming days from the Python verse. Please share & subscribe my post & let me know your feedback.

Till then, Happy Avenging! 😀

Note: All the data & scenario posted here are representational data & scenarios & available over the internet & for educational purpose only. Some of the images (except my photo) that we’ve used are available over the net. We don’t claim the ownership of these images. There is an always room for improvement & especially the prediction quality.

Calling Twilio Voice API to deliver custom voice calls to the subscriber

Hello Guys!

It’s time to share another installment of fun & exciting posts from the world of Python-verse.

Today, We’ll be leveraging the Twilio voice API to send custom messages through phone calls directly. This service is beneficial on many occasions, including alerting the customer of potential payment reminders to pending product delivery calls to warehouse managers.


Dependent Packages:

Let us explore what packages we need for this –

Dependent Package Installation

The commands for your reference –

pip install twilio
pip install pandas

Also, you need to subscribe/register in Twilio. I’ve already shown you what to do about that. You can refer to my old post to know more about it. However, you need to reserve one phone number from which you will be calling your customers.

Buying phone numbers

As you can see, I’ve reserved one phone number to demonstrate this use case.


Let us explore the key codebase –

  1. clsVoiceAPI.py (Main class invoking the voice API)


##############################################
#### Written By: SATYAKI DE ####
#### Written On: 30-Mar-2021 ####
#### Modified On 30-Mar-2021 ####
#### ####
#### Objective: Calling Twilio Voice API ####
##############################################
import json
from clsConfig import clsConfig as cf
import logging
import os
from twilio.rest import Client
class clsVoiceAPI:
def __init__(self):
self.account_sid = cf.conf['TWILIO_ACCOUNT_SID']
self.auth_token = cf.conf['TWILIO_AUTH_TOKEN']
self.from_phone = cf.conf['FROM_PHONE']
self.to_phone = cf.conf['TO_PHONE']
def sendCall(self, msg):
try:
account_sid = self.account_sid
auth_token = self.auth_token
from_phone = self.from_phone
to_phone = self.to_phone
client = Client(account_sid, auth_token)
call = client.calls.create(
twiml='<Response><Say>' + str(msg) + '</Say></Response>',
to=str(from_phone),
from_=str(to_phone)
)
resTokenOutput = call.sid
print('Final Respone: ' + str(resTokenOutput))
resToken = 0
return resToken
except Exception as e:
x = str(e)
resToken = 1
print(x)
logging.info(x)
return resToken

view raw

clsVoiceAPI.py

hosted with ❤ by GitHub

Key snippets from the above codebase –

call = client.calls.create(
                            twiml='<Response><Say>' + str(msg) + '</Say></Response>',
                            to='+18048048844',
                            from_='+19999990396'
                        )

We’re invoking the Twilio API in the above block by giving both the calling & Callee numbers. And, we’re receiving the desired messages from our primary calling program, which the IVR will spell while calling to the customers.

2. callTwilioVoice.py (Main calling script)


#########################################################
#### Written By: SATYAKI DE ####
#### Written On: 06-Mar-2021 ####
#### Modified On 07-Mar-2021 ####
#### ####
#### Objective: Main calling scripts – ####
#### This Python script will consume an ####
#### source API data from Azure-Cloud & publish the ####
#### data into an Oracle Streaming platform, ####
#### which is compatible with Kafka. Later, another ####
#### consumer app will read the data from the stream.####
#########################################################
from clsConfig import clsConfig as cf
import clsL as cl
import logging
import datetime
import clsVoiceAPI as ca
# Disbling Warning
def warn(*args, **kwargs):
pass
import warnings
warnings.warn = warn
# Lookup functions from
# Azure cloud SQL DB
var = datetime.datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
def main():
try:
# Declared Variable
ret_1 = 0
debug_ind = 'Y'
res_2 = ''
# Defining Generic Log File
general_log_path = str(cf.conf['LOG_PATH'])
# Enabling Logging Info
logging.basicConfig(filename=general_log_path + 'TwillioAPICall.log', level=logging.INFO)
# Initiating Log Class
l = cl.clsL()
# Moving previous day log files to archive directory
log_dir = cf.conf['LOG_PATH']
tmpR0 = "*" * 157
logging.info(tmpR0)
tmpR9 = 'Start Time: ' + str(var)
logging.info(tmpR9)
logging.info(tmpR0)
print()
print("Log Directory::", log_dir)
tmpR1 = 'Log Directory::' + log_dir
logging.info(tmpR1)
print('Welcome to the Twilio Voice Calling Program: ')
print('*' * 160)
print()
# Provide a short input text for calls
voiceCallText = 'Voice From Satyaki, Welcome to the Python World!'
# Create the instance of the Twilio Voice API Class
x1 = ca.clsVoiceAPI()
# Let's pass this to our map section
resSID = x1.sendCall(voiceCallText)
if resSID == 0:
print('Successfully send Audio Message!')
else:
print('Failed to send Audio Message!')
print()
print('Finished Sending Automated Calls..')
print("*" * 160)
logging.info('FFinished Sending Automated Calls..')
logging.info(tmpR0)
tmpR10 = 'End Time: ' + str(var)
logging.info(tmpR10)
logging.info(tmpR0)
except ValueError as e:
print(str(e))
print("Invalid option!")
logging.info("Invalid option!")
except Exception as e:
print("Top level Error: args:{0}, message{1}".format(e.args, e.message))
if __name__ == "__main__":
main()

Key snippets from the above codebase –

        # Create the instance of the Twilio Voice API Class
        x1 = ca.clsVoiceAPI()

        # Let's pass this to our map section
        resSID = x1.sendCall(voiceCallText)

As you can see, we’re first instantiating the class & then calling the method from it by providing the appropriate messages that will eventually deliver to our customer. You can configure dynamic content & pass it to this class.


Let us explore the directory structure –

Directory Structures

Let us see how it runs –

Running Applications

You need to make sure that you are checking your balance of your Twilio account diligently.

Checking Balance

And, here is the sneak peak of how it looks like in an video –

Actual execution

For more information on IVR, please check the following link.


Please find the git details in this link.

So, finally, we have done it.

I’ll bring some more exciting topic in the coming days from the Python verse.

Till then, Happy Avenging! 😀

Note: All the data & scenario posted here are representational data & scenarios & available over the internet & for educational purpose only.