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• Playing large AVI files online with subtitles

  3 mai 2012, par Tareq

  I need a way to play a relatively large avi files (1+ GB) on the web with their subtitles, I have searched a lot for this, the only thing that I came up with was a normal embed without controls and it requires specific browser or application to show controls or even play.

  I have a large number of files (12 TB) so converting these files to mp4 would take ages not to mention having to miss with quality of audio or video.

  Is there a way that allows me to play these online along with their subtitls or should I convert these to MP4 ? I have tried to convert a file to MP4 and it didn't play either apparently it hits the browser limits or something (I tried playing it using flowplayer).

  I was considering a solution like red5, but as I found out it doesn't support avi either.

  I used this command to convert the mp4

  ffmpeg -y -i $file.avi -vcodec copy -acodec copy -copyts -f mp4 $file.mp4

  It toke relatively long time to get converted, if you have a better command or a solution that will work for playing the avis without converting, Please be my guest.

• How to get the real, actual duration of an MP3 file (VBR or CBR) server-side

  25 septembre 2016, par SquareCat

  I used to calculate the duration of MP3 files server-side using ffmpeg - which seemed to work fine. Today i discovered that some of the calculations were wrong. Somehow, for some reason, ffmpeg will miscalculate the duration and it seems to happen with variable bit rate mp3 files only.

  When testing this locally, i noticed that ffmpeg printed two extra lines in green.

  Command used :

  ffmpeg -i song_9747c077aef8.mp3

  ffmpeg says :

  [mp3 @ 0x102052600] max_analyze_duration 5000000 reached at 5015510
  
  [mp3 @ 0x102052600] Estimating duration from bitrate, this may be inaccurate

  After a nice, warm google session, i discovered some posts on this, but no solution was found.

  I then tried to increase the maximum duration :

  ffmpeg -analyzeduration 999999999 -i song_9747c077aef8.mp3

  After this, ffmpeg returned only the second line :

  [mp3 @ 0x102052600] Estimating duration from bitrate, this may be inaccurate

  But in either case, the calculated duration was just plain wrong. Comparing it to VLC i noticed that there the duration is correct.

  After more research i stumbled over mp3info - which i installed and used.

  mp3info -p "%S" song_9747c077aef8.mp3

  mp3info then returned the CORRECT duration, but only as an integer, which i cannot use as i need a more accurate number here. The reason for this was explained in a comment below, by user blahdiblah - mp3info is simply pulling ID3 info from the file and not actually performing any calculations.

  I also tried using mplayer to retrieve the duration, but just as ffmpeg, mplayer is returning the wrong value.

• HTML5 compatiblity : data rel

  31 août 2012, par suit

  m colorbox/jquery.colorbox.js HTML5 compatiblity : data rel as you have stated in #168, the data-rel attribute should be the default behaviour unfortunately your solution with rel : function() $(this).data(’rel’) ; does not work, since settings.rel is filled subsequently with "nofollow" if not (...)