How to Install ffmpeg on aws lambda machine?

Installing and using FFmpeg on AWS Lambda is unique due to environment constraints, such as limited access to the provided runtime and restrictions on external interactions. Traditional installation methods (e.g., using apt-get or yum) are not applicable on Lambda. Here is a common approach to using FFmpeg on AWS Lambda:

1. Creating a Custom Lambda Layer

A Lambda layer is an optional code package containing custom runtimes, libraries, or other dependencies that can be shared across one or more Lambda functions. You can use a Lambda layer to include the FFmpeg binary files.

Steps:

• Download FFmpeg: On a Unix-like system (e.g., Linux or macOS), download the precompiled binary of FFmpeg.
• Create the required directory structure for the Lambda layer: AWS Lambda requires a specific folder structure to identify the contents to include. For binaries, they are typically placed in the bin/ directory. For example, create a folder structure like ffmpeg_layer/bin/, and place the downloaded FFmpeg binary in the bin/ directory.
• Package the Lambda layer: Run the following command in the directory containing the bin/ folder (e.g., ffmpeg_layer/) to create a zip file for the layer:

  bash
  zip -r ffmpeg_layer.zip bin

• Upload and create the Lambda layer: In the AWS Management Console, select Lambda, then navigate to the left menu and choose 'Layers', click 'Create layer'. Provide a name, upload the previously created zip file, and select the supported runtime (based on your Lambda function's runtime environment). Remember the layer version ARN for later use when creating or updating Lambda functions.

2. Using FFmpeg in a Lambda Function

In your Lambda function configuration, add the previously created Lambda layer:

• In the 'Designer' view of your function, select 'Layers', then click 'Add a layer'.
• Select 'Custom layers', then choose the layer version you created.
• Now, in your Lambda function code, you can use FFmpeg by calling /opt/bin/ffmpeg since all layer files are extracted to the /opt/ directory.

Example Code

Assuming you are using Node.js as the Lambda runtime environment, your Lambda function code might look like this:

javascript
const { execSync } = require('child_process');

exports.handler = async (event) => {
    try {
        const output = execSync('/opt/bin/ffmpeg -version');
        console.log(output.toString());
    } catch (err) {
        console.error('Error executing ffmpeg:', err);
    }
    return {
        statusCode: 200,
        body: JSON.stringify('Function executed successfully!'),
    };
};

This code simply runs FFmpeg in the Lambda environment, outputs its version information, and returns the execution result.

By using this approach, you can leverage FFmpeg in AWS Lambda to process video and audio without uploading the FFmpeg binary with every deployment. This reduces the deployment package size and improves deployment efficiency.