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• Segmenting media files with FFMPEG

  2 mai 2012, par Luuk D. Jansen

  In the newer releases of FFMPEG it is supposed to be possible to segment media files.
  I checked out the SVN with

  svn checkout svn://svn.ffmpeg.org/ffmpeg/trunk ffmpeg

  However, after building and trying to segment with the command below I get the error :

  Unrecognized option 'segment_time'

  Is there a specific ./configure option needed or a specific branch ?
  There is nothing mentioned in FFMPEG manual (neither which version supports it). I would prefer to use a pre-build production version if possible.

  Command used to test :

  ffmpeg -v 9 -loglevel 99 -re -i test.mov -an -c copy -b:v 128k -flags -global_header -map 0 -f segment -segment_time 4 -segment_list test.m3u8 -segment_format mpegts stream%05d.ts

• Code to combine multiple media files using ffmpeg

  21 mars 2013, par user2193172

  I am new to ffmpeg

  I am trying to combine multiple media files using ffmpeg, I know the ffmpeg concatenation protocol allows this through a command line arguement. I want to know if the C code for this function is available anywhere, so that I can include the same in my program. If not, I would really appreciate if someone could post any suggestions on how to do this. Basically, I want to combine multiple files without doing the decoding and encoding of files.

  I tried copying the data from one file to another, while I was able to create a new file, i couldn't play it back.

  I searched the ffmpeg library but was unable to locate the code on how the concatenation function works.

• PHP - FFMPEG - Unable to apply multiple regular expressions on media output

  9 avril 2012, par Parth G

  I am writing a php script (I have to use php) to cycle through a dir of media files and displaying media information in a chart.

  Right now, I'm trying to do it on 1 file.

  I can successfully do so. I currently can parse the output (using regular expressions) to obtain information such as file name, duration, resolution, etc

  I was told that I can combine the regular expressions to make it more efficient.

  When I do however, I am unable to parse the ffmpeg output correctly.

  Consequently, I've tried copying the output to a string and parsing that using multiple expressions and it works just fine.

  Any help is appreciated.

  Thanks.

  ---

  Working code

  $media_info = "'test.mkv': Metadata: creation_time : 2011-03-12 09:04:18 Duration: 00:21:44.10, start: 0.000000, bitrate: 500 kb/s Chapter #0.0: start 0.097000, end 1304.107000 Metadata: title : 00:00:00.097 Stream #0:0: Video: h264 (High), yuv420p, 720x400 [SAR 80:81 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default) Stream #0:1: Audio: aac, 48000 Hz, stereo, s16 (default) At least one output file must be specified";
  
  
  
  
  
  $file = array();
  
  $file_test = preg_match_all("/'([a-zA-Z0-9\._]*\.[a-zA-Z0-9]*)'.* Duration: ([0-9]{2,}:[0-9]{2}:[0-9]{2}\.[0-9]*)/", $media_info, $file);;
  
  var_dump($file)

  ---

  Not Working Code

  ob_start();
  
  passthru("C:\\wamp\\www\\ffmpeg\\bin\\ffmpeg.exe -i \"{$videofile}\" 2>&1");
  
  $raw_data = ob_get_contents();
  
  ob_end_clean();
  
  
  
  
  
  $ffmpeg_info =  explode("from", $raw_data);
  
  
  
  
  
  $media_info = $ffmpeg_info[1];
  
  
  
  $file = array();
  
  $file_test = preg_match_all("/'([a-zA-Z0-9\._]*\.[a-zA-Z0-9]*)'.* Duration: ([0-9]{2,}:[0-9]{2}:[0-9]{2}\.[0-9]*)/", $media_info, $file);;
  
  var_dump($file)

  ---

  New Code

  I tried using the ffmpeg-php extension and the following works (except for printing the bit rate)

  $movie = new ffmpeg_movie($video_file);
  
  
  
  echo $movie->getFilename();
  
  echo "<br />" ; 
  
  echo $movie->getDuration();
  
  echo "<br />" ;
  
  echo $movie->getFrameWidth();
  
  echo "x";
  
  echo $movie->getFrameHeight();
  
  echo "<br />" ; 
  
  echo $movie->getBitRate();
  
  echo "<br />" ; 
  
  echo $movie->getVideoBitRate();
  
  echo "<br />" ; 
  
  echo $movie->getAudioBitRate();
  
  echo "<br />" ;
  
  echo $movie->getVideoCodec();
  
  echo "<br />" ;
  
  echo $movie->getAudioCodec();
  
  ?>