Recherche avancée

Sur d’autres sites (11518)

• avcodec/videotoolboxenc : add CBP/CHP profile

  3 juin 2023, par xufuji456

  avcodec/videotoolboxenc : add CBP/CHP profile
  The CBP/CHP profile has available with H264 in iOS 15.0.
  
  Official Doc : https://developer.apple.com/documentation/videotoolbox/kvtprofilelevel_h264_constrainedbaseline_autolevel
  Signed-off-by : Rick Kern <kernrj@gmail.com>
  

  • [DH] libavcodec/videotoolboxenc.c

• FFMpeg convert VOB to H264 and multi language

  26 octobre 2016, par gduh

  I try to convert VOB files to H264. I know it seems to be crazy to do that but the goal is to use it with the Apple TV.

  To just converting a VOB file to mp4 with the right audio stream is not really a problem.

  The problem is when the VOB file contains multi-sequences in different languages. For example, in the mp4’s file I will have 3 seconds of video including for example a book on the screen in english, then, the same 3 seconds with the book in french and so on...
  But with the VOB file I will have only the 3 seconds in the right language.

  When I check the VOB file, I only see one stream #0.0 for the video.

  So my question is, how can I avoid to include the differents videos sequences with these different languages ?

  Thx for your help.

• Rotated video with ffmpeg doesn't play in flowplayer in IE9

  17 octobre 2013, par yoshi

  I have a script that rotates videos 90 degrees and then the videos are displayed on a web page using flowplayer (HTML5 version, not Flash). After the video is rotated once it does not play in IE9 but plays without any other problems in Chrome and Firefox.
  The error message is : Video file not found.

  I've looked in IE9's developer tools console, in the network tab and the browser streams the whole video.

  The following is the ffmpeg command I use to rotate and convert the video :

  ffmpeg -i input.mov -y -r 30 -b 4M -vf 'transpose=1,scale=800:trunc(ow/a/2)*2' -ar 48000 -vcodec libx264 -profile baseline -preset slow -level 2.2 output.mp4

  This is the input file which I used : https://dl.dropboxusercontent.com/u/37994/local%20capture.mov

  This is the output video : https://dl.dropboxusercontent.com/u/37994/local%20capture%20rotated.mp4

  The input video from above is a screen capture made using QuickTime on Mac OS.

  This also happened for this video : http://mirrorblender.top-ix.org/peach/bigbuckbunny_movies/big_buck_bunny_480p_h264.mov
  And also this one : https://dl.dropboxusercontent.com/u/37994/clipcanvas_14348_offline.mp4

  This didn't happen for the sample .mov from here : http://support.apple.com/kb/ht1425

  If I run the command twice, meaning I rotate the video 90 degrees and then I rotate the output using the same command once more, the problem disappears, but I need to be able to rotate only 90 degrees.

  This problem doesn't happen if I put IE9 in IE7 or IE8 compatibility mode.

  I was thinking that maybe the problem was how the server serves the video but there's no problem with other videos.

  I looked at the metadata with ffmpeg but didn't see anything significant.

  I already have AddType video/mp4 .mp4 in .htaccess.

  I can't seem to pin down what's causing this problem.

  Edit :

  Request in IE9
  

  Response in IE9