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• ffmpeg : Transcoding multiple input files to multiple output files with single command

  18 mai 2017, par Abubakar

  i want to convert three files with single command. i used following command.

  -i "C:\fil1.mp4" -i "C:\file2.mp4" -i "C:\file3.mp4" -acodec libmp3lame -ab 32k -ar 22050 -ac 2 -b:v 128k -r 20 -s 176x144 -y file1.mp4 -acodec libmp3lame -ab 32k -ar 22050 -ac 2 -b:v 128k -r 20 -s 176x144 -y file2.mp4 -acodec libmp3lame -ab 32k -ar 22050 -ac 2 -b:v 128k -r 20 -s 176x144 -y file3.mp4

  but it convert first file with named fil1.mp4, fil2.mp4, fil3.mp4 but i want all files should be convert with its output file names.

• How give information about file with binary path /usr/bin/ffmpeg ? [closed]

  19 septembre 2012, par John Smith

  How give information about file with binary path /usr/bin/ffmpeg ?

  Peoples its not answer - its code for help all peoples-)

  Long time i search the correct code, now i write here. Washes it be useful to someone.

  1) get duration file

  ob_start();
  
  passthru("ffmpeg-9260.exe -i \"". $videofile . "\" 2>&1");
  
  $duration = ob_get_contents();
  
  ob_end_clean();
  
  
  
  
  
  preg_match('/Duration: (.*?),/', $duration, $matches);
  
  $duration = $matches[1];
  
  $duration_array = split(':', $duration);
  
  $duration = $duration_array[0] * 3600 + $duration_array[1] * 60 + $duration_array[2];
  
  $time = $duration * $percent / 100;
  
  $time = intval($time/3600) . ":" . intval(($time-(intval($time/3600)*3600))/60) . ":" . sprintf("%01.3f", ($time-(intval($time/60)*60)));

  2) get a picture of a particular frame of the video (flv or avi or another)

  ffmpeg -i video.avi -an -ss 00:01:30 -r 1 -vframes 1 -s 320×240 -y -f mjpeg screenshot.jpg

  3) how to convert video file to format .ogg

  a) ffmpeg -an -deinterlace -s 400×300 -r 20.00 -i CapeCodMarsh.avi -vcodec rawvideo -pix_fmt yuv420p -f rawvideo – |  ffmpeg -an -f rawvideo -s 400×300 -r 20.00 -i – -f yuv4mpegpipe – |  libtheora-1.0/lt-encoder_example –video-rate-target 512k – -o tmp.ogv
  
  
  
  b)ffmpeg -y -i CapeCodMarsh.avi -vn -acodec libvorbis -ac 2 -ab 128k -ar 44100 audio.ogg

  4) How I can get this value for the buffer ?

  var v = document.getElementById('file_id');
  
  var r = v.buffered.end(0);

  Enjoy=)

• Concat video with different sizes and config with ffmpeg

  31 juillet 2022, par Abrar

  I am building a mobile app where I am using ffmpeg to process videos.

  


  Users can choose multiple videos and they need to be merged together creating a final video.

  


  The problem is their selected videos can have different dimensions and configurations.

  


  So, when I tried concat demuxer, it produces weird results with impossible length and no data.

  


  concat protocol with intermediate ts file, seems to work but the resolution and size is stretched.

  


  So, what I want to do is this -

  


  


  1. Re encode every video to a specific resolution, 1080:1920 or 9/16. The video should not be stretched, instead black borders will be added on sides to make it that size.

     


  


  2. Once every video is re encoded and have the same config, concat them.

     


  


  


  How can I do this ?