sample serverless app with ffmpeg and python

serverless.py

import json
import os
import boto3

def lambda_handler(event, context):
    try:
        s3 = boto3.client('s3')
        """Downlod video from private S3"""
        s3.download_file('serverless-test-2020', 'Big_Buck_Bunny_1080_10s_1MB.mp4', '/tmp/test-video.mp4')
        
        """Generate a thumbnail and save""" 
        command='/opt/bin/ffmpeg -i /tmp/test-video.mp4 -ss 00:00:01 -vframes 1 -filter:v scale="280:-1" /tmp/test-output.png -y'
        os.system(command)
        
        """Upload the thumbnail to the public S3"""
        target_bucket='serverless-test-public'
        target_key='test-output.png'
        response = s3.upload_file('/tmp/test-output.png', target_bucket, target_key, ExtraArgs={'ACL':'public-read'})
        
        """Generate public object URL"""        
        location = s3.get_bucket_location(Bucket=target_bucket)['LocationConstraint']
        url = "https://s3-{}.amazonaws.com/{}/{}".format(location, target_bucket, target_key)

        return {
            'statusCode': 200,
            'body': json.dumps({'thumbnail':url})
        }
    except Exception:
        return {
            'statusCode': 500
        }