Newest 'ffmpeg' Questions - Stack Overflow

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• how to merge several audio files(they are different format) to by using ffmpeg command ?

  24 mars 2015, par alexsta

  I want to merge several audio files(they are different format eg. mp3 , m4a , wav) to by using ffmpeg command and output the result to highest quality audio format.

• MKV to MP4 converted video doesn't play in flex

  24 mars 2015, par ketan

  I am stuck on one issue from last 1 day. I am using Adobe flex video display to play video for my site.

  There is some converted video from MKV to MP4 using ffmpeg.

  ffmpeg -i Test.mkv -vcodec copy -acodec copy Test.mp4
  

  Now, i am trying to play that video from local it's working fine. But when i upload that video on server and trying to play video. Then it will not work with flex VideoDisplay same will work in browser and HTML videoplayer and also works with JWPlayer.

  Other mp4 video which are not converted works very fine. Only converted Videos are not working in only flex VideoDisplay.

  Any help will be appreciate,
  Thanks.

• FFMpeg : Images to Video take more time

  24 mars 2015, par Butani Vijay

  i am using FFmpeg library project as provided in This Link.

  Actually i want to create video from bunch of images.

  i am using following command :

  ffmpeg -framerate 1/5 -i img%d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4
  

  command takes more time to create video. what can i do to improve speed?

• Php laravel video upload and transcode in background

  24 mars 2015, par Dev

  I am using laravel 4.2.

  The project requirement is that after uploading the video, it must be transcoded using FFMPEG in background.

  What is the best approach for it to run the transcoding procedure into the background??

  Should I go for a cron job that will be fired after uploading the video?

  I tried using Laravel Queue mechanism but it is not successful in Windows machine.

  I also tried using Ajax request but while transcoding if user navigates to other pages then it is not working properly.

• Not able to use exec command to use ffmpeg

  24 mars 2015, par Sameeksha Kumari

  I am researching over ffmpeg usage for quite a while and seemed little confusing to me. Finally I found that exec command of PHP could help in execution of ffmpeg command if ffmpeg is installed on the system . I created the php script below:

    exec("ffmpeg -i C:\Users\sameeksha\Downloads\v.mp4 -ar 22050 -ab 32 -f flv -s 320x240 C:\FFMPEG\video.flv", $output, $return);
  
       if($return) {
          echo "created ".$output;     
      }
      else 
          echo "not ".$output;
  

  The same command run from command line is creating the converted video, but when I run it as a PHP script it does not. I even installed dll files for ffmpeg but still did not work for me.

  Any help would be appreciated.