Recherche avancée

Sur d’autres sites (6710)

• Is there a good set of ffmpeg presets to target multiple platforms available anywere ?

  17 mai 2012, par Prody

  I'm working on a web app that would let users upload a video.

  The user's video should then be played on apps on a few platforms :

  • web, via flash
  • iOS native player
  • Android phones - hopefully all players, even low-end devices

  I plan to do the encoding with ffmpeg which has this very cool preset feature.

  I'm sure I'm not the only one to find this out, but when I Google ffmpeg encode for iPhone, I get as many different parameter sets on people's blogs as results.

  Furthermore, people sometimes use parameters which are not even documented.

  Since ffmpeg supports these presets, I can't believe we don't have a "preset database" somewhere which has such presets as iPhone_low_quality, Android_low_end_device_low_quality, etc.

  Am I just failing to find it ?

• Can I call multiple FFMPEG processes on a multi-core LAMP machine from PHP ?

  12 décembre 2012, par undefined

  I am using PHP to call an FFMPEG command using exec(). The script that initiates this command is called from another PHP script using

  proc_close(proc_open('php /phpdirectory/process.php &', array(), $foo));

  This works great. The ffmpeg command is called and runs 'in the background' leaving the first script to return to the user and in this case carry on uploading files. What if I am using a machine with multiple cores ? How would I go about optimizing things so that I could call an ffmpeg process for each core ? Or will a multicore machine process split the work between cores anyway and get through a single process faster ?

  Anyone ?

• mpegvideo_enc/rv10 : width and hieghtmust be multiple of 16

  13 décembre 2012, par Piotr Bandurski

  mpegvideo_enc/rv10 : width and hieghtmust be multiple of 16