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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

• How I can run cloud apps in my mobile phone [closed]

  17 mai 2022, par Deepak

  I want to create an Android application on my own. I want to run a cloud running app on my mobile phone. Here is the thing :

  


  The super application will be deployed in the Play store. I know the super app concept but the does not apply here because we can not ask anyone to create the mini framework of their application.

  


  

  1. I have a server that is running Android OS

  


  2. I want to run the application on my mobile phone which is actually running on my server. I want to stream that and play with that application without any installation.

  


  


  Any suggestions on what I shall use :

  


  

  1. to play the app ?

  


  2. To control the cloud app from my Android mobile ?

  


  


• Error in FFMPEG/LIBAV audio_decode example for aac decoding

  23 mai 2017, par Prashant Ravi

  I am trying to do aac decoding using the examples provided by FFMPEG/LIBAV. I modified the example as follows :-

  int main(int argc, char **argv)
  
  {
  
      .......
  
      /* find the MPEG audio decoder */
  
      codec = avcodec_find_decoder(AV_CODEC_ID_AAC);
  
      if (!codec) {
  
          fprintf(stderr, "codec not found\n");
  
          exit(1);
  
      }
  
      .......
  
      return 0;
  
  }

  I changed the decoder type to "AV_CODEC_ID_AAC" and recompiled the examples.

  Once I ran the example for decode audio with an example aac audio file but I am getting the following

  prashantravi@mini:/media/sf_Shared/libav/doc/examples$ ./decode_audio ../../../example.aac ../../../out.wav
  
  Error submitting the packet to the decoder
  
  err code :-1052488119

  I tried looking up the error code but it dosent match with any of the existing error codes at all.