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• How to read remote video on Amazon S3 using ffmpeg

  9 septembre 2024, par virtualize

  I need to create poster frames from videos hosted on Amazon S3 via ffmpeg.

  



  So is there a way to use the remote video file directly in ffmpeg command line like this :
  
ffmpeg -i "http://bucket.s3.amazonaws.com/video.mp4" -ss 00:00:10 -vframes 1 -f image2 "image%03d.jpg"

  



  ffmpeg just returns :
  
http://bucket.s3.amazonaws.com/video.mp4: I/O error occurred<br />&#xA;Usually that means that input file is truncated and/or corrupted.

  



  I also tried forcing ffmpeg to use the videos mp4 container for reading :
  
ffmpeg -f mp4 -i "http://bucket.s3.amazonaws.com/video.mp4" ...
  
But no luck.

  



  Wget this video from S3 and processing it locally works fine of course,
  
as well as reading the file remotely from other 'standard' http servers.
  
So I know that ffmpeg supports remote file reading, but why not on S3 ?

  


• What is the right command to convert an mp3 file to the required codec version (MPEG version 2) and bit rate (48 kbps) for Amazon Alexa SSML ?

  1er février 2019, par Asimov4

  I am trying to convert an mp3 file to the format expected by the audio tag in the Amazon Alexa SSML markup language as described here : https://developer.amazon.com/public/solutions/alexa/alexa-skills-kit/docs/speech-synthesis-markup-language-ssml-reference

  The documentation recommends using https://www.ffmpeg.org/ffmpeg.html

  I tried this command but can’t find the right codec to use :
  ffmpeg -y -i input.mp3 -ar 44100 -ab 48k -codec:a mpeg2 -ac 1 output.mp3

  I know I need to convert the file because Alexa fails with the following error : The audio is not of a supported MPEG version

• Amazon Elastic Transcoder vs FFMPEG [closed]

  7 juillet 2017, par KiranD

  I’m developing a website (php based) and there is a provision to upload videos in different formats. I’m using HTML5 player for the front end presentation. So, as the ideal format that is supported by most of the browsers is mp4, I tried using ffmpeg and it works fine.

  I would like to know which transcoder (Amazon Elastic Transcoder or FFMPEG) would be best for handling conversions parallely when there is a huge traffic.

  There could me approximately thousands of users watching the videos and may be hundreds uploading the videos at the same time. I’m using Amazon EC2 for deployment and the traffic is mostly spiky (not flat).

  I’m not sure about the acceptable speed. But, I need the one which can transcode the videos much faster.