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• How to stream a wmv file as an mp4 file (convert on the fly) over HTTP using ffmpeg or something similar ?

  8 juin 2016, par Adam Tal

  I understand it’s not possible to use the tag to play a WMV file.

  I thought about the following solution :

  • Streaming a video means sending small chunks of frames and sound
  • Reading a wmv file in chunks is surely possible
  • An html video tag can receive chunks in an mp4/webm/ogg format and display it

  Can I read a WMV file as a Steam and convert in on the fly to output it as if it was an MP4 file ?

  Few points :

  • The technology is not really important. I just have a problem I need to solve.. I would prefer a solution in C# or node.js because those are environments I’m comfortable with but anything else will do.
  • I will be happy to stream the file from a different server as wmv and output it as mp4 but I’m also able to download the file completely to my server and stream it from the local hard drive.
  • The mp4 output is not a must. It can also be webm or ogg (just need the video tag to support it)

• what is ffmpeg exit code 2 ? and also output error array is empty and not working in php

  14 juin 2019, par Mehdi Zamani

  I use ffmpeg to convert bitrate to 128 but not working in php

   exec("ffmpeg -i input.mp3 -codec:a libmp3lame -b:a 128k output().mp3 2>&1", 
  
   $output, $exit_code);
  
   if ($exit_code!= 0) {
  
      $data['message'][] = "Error";
  
   }
  
  
  
   print_r($output);
  
   print_r($exit_code);
  
   exit;

  After running this code show error code 2.
  The output is an empty array and also exit_code is 2 and not create output.mp3 file.

  I already study How can I find out what this ffmpeg error code means ? but this isn’t my problem and don’t explain error code 2 or error code 2 is not defined. My problem is dont show any error and error message is empty just exit_code show 2 that means is some error happened.

• filesize is not growing as expected

  29 juillet 2019, par Oracy Martos

  I am trying to record a stream here on my machine to study ffmpeg library,
  but with(out) success.

  I have a file watcher to clean up bugged streams, that cleanup each 3 minutes files that have been not changed less then 3 minutes.

  The real problem is, if I use the command below :

  /usr/bin/ffmpeg -i http://sysrad.net:10090/ -y test.mp3

  this command doesn’t have any kind of codec or audio transformation, so my target file (test.mp3) become 256k quickly, but, if I use this command below :

  /usr/bin/ffmpeg -i http://sysrad.net:10090/ -y -b:a 8k -ac 1 -ar 11025 test.mp3

  My target file (test.mp3) keep 0k until the record has 256k, I am not sure if this is an Unix problem or ffmpeg problem.

  Other information, if I run in loop :

  while true; do wc -l teste.mp3; sleep 0.5; done;

  test.mp3 file keeps 0 rows, until has 256k size...

  I have no idea how to workaround that, to get the real time file size for each 1k that ffmpeg get from stream with those codecs, does you guys have any idea how can I handle that ?

  Thanks !!!!