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• How to build a daemon to encode video files on S3 ?

  4 avril 2013, par Yuval Cohen

  I am interested in running a daemon to go over user uploaded video files and encode them in an optimal format (and add some watermarks).

  I was considering services such as Zencoder, Encoding.com, Amazon's encoding service but some lack overlaying capabilities and some are just too expensive for our (big) volumes.

  I want to build a daemon that encodes videos that are located on S3 once users upload them.

  The solution I thought of would be Python Heroku servers using Celery for a task queue to keep track of the encoded files and ffmpeg to do the actual work. However, I ran into troubles compiling ffmpeg for Heroku (with libass support, so the basic ffmpeg bins aren't enough).

  What approach/technology stack would you consider for this mini-project ?

  Thanks !
  Yuval

• What are the gotchas of using statically linked libraries in serverless platforms such as Google Cloud Functions ?

  5 septembre 2017, par Dzh

  Libraries such as ffmpeg-static upload statically linked binaries onto container.

  I wonder what are the drawbacks of using this approach ?

  Does the library size counts against your memory use (it’s billed by GCloud) ?

  Does it slow down the container ? Perhaps some future-proofing issues ?

  Edit : Found something of a related (I wanted to setup OpenCV) on AWS blog. It doesn’t explain drawbacks, just shows how to do it exactly.

• Modify video with FFMPEG before uploading to S3

  12 juillet 2017, par user774615

  When a user uploads a video, I want to remove its audio. So in my Laravel code, I have something like this :

  // The video from the HTML form
  
  $video = $request->file('video');
  
  
  
  // Strip the audio
  
  exec('ffmpeg -y -i ' . <path to="to" file="file"> . ' -an -c copy ' . <new file="file" path="path">);
  
  </new></path>

  The problem is, I want to upload the final video (without audio) to Amazon’s S3 without saving any part of the video on my local server.

  Is there a way to use $video as the input for the ffmpeg command and then output the result directly to S3 ? How ?