CODEWITHSUNDEEP
pythonamazon-web-servicesamazon-s3ffmpeg
Jay
Jay

Reputation: 185

How to SRC files from S3 bucket

This code works perfectly on my local machine but I would like to move it to AWS Lambda

I have already uploaded ffmpeg as a binary dependency to the function layer 

import subprocess
p = subprocess.call(
    'ffmpeg -r 1 -loop 1 -i "./ep1.png" -i "./ep1.mp3" -acodec copy -r 1 -shortest -vf scale=1280:720 ep1.flv', shell=True)

Question is How do I replace 

"./ep1.png"

and 

"./ep1.mp3"

as an understandable path for the ffmpeg command

This is documentation I found from boto3 but I'm not sure how to implement it 

 s3 = boto3.client('s3')
 s3.download_file('BUCKET_NAME', 'OBJECT_NAME', 'FILE_NAME')

Let me know if I'm heading in the right direction, after this step I would use boto3 to upload ep1.flv to an output S3 bucket

Upvotes: 0

Views: 487

Answers (1)

John Rotenstein
John Rotenstein

Reputation: 269490

AWS Lambda functions can store data in the /tmp/ directory.

So, you could use:

 s3.download_file('my-bucket', 'ep1.mp3', '/tmp/ep1.mp3')
 s3.download_file('my-bucket', 'ep1.png', '/tmp/ep1.png')

p = subprocess.call(
    'ffmpeg -r 1 -loop 1 -i "/tmp/ep1.png" -i "/tmp/ep1.mp3" -acodec copy -r 1 -shortest -vf scale=1280:720 /tmp/ep1.flv', shell=True)

Also, make sure you delete the files in /tmp/ before your function exits because the container might be reused and there is only 500MB of storage provided.

Upvotes: 1

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