Recherche avancée

Sur d’autres sites (6985)

• FFMpeg Segment for Quicktime

  30 mai 2015, par Gavin Hinfey

  I have a 20 sec h264 .mov with edits every 2 seconds. Download the video here : http://we.tl/OsLdXMtkPe.
  I need to segment the video on the cuts. Using FFProbe I have found the cuts in frames.

  $ffmpeg -i Asia.mov -force_key_frames 88,134,180,223,271,317,365,410,455,499,549,588 -codec:v mpeg4 -codec:a pcm_s16le -map 0 -f segment -segment_frames 88,134,180,223,271,317,365,410,455,499,549,588 out%03d.mov

  The resulting video plays correctly only in windows media player and vlc.
  It does not play correctly in Quicktime 7 or iTunes.

  How can I split this video at these frame intervals with an iTunes compatible result ?

  Thanks
  Gavin

• How to create a video from still images but with low framerate (like a slideshow) ?

  18 septembre 2012, par AKE

  I have some still images which I would like to have in a video that shows each image for a reasonable length of time, say 1 second, or 0.5 second.

  I'm using the command :

  ffmpeg -f image2 -r 1 "Imgp%004d.jpg" -s 640x480 -b:v 1024k result.avi

  where -r 1 supposedly sets the framerate to 1 fps.

  This does indeed produce a result (avi), but playback (on vlc) gets stuck on the first frame and never advances !

  If I use -r 3 instead, I get a result that plays a bit too fast, i.e. at 3 frames per second. Moreover, it doesn't include all of the still images.

  Two questions :

  1) How can I force ffmpeg to compile the video at 1 fps ?

  2) How can I force all 7 frames to appear ? (Preferably without duplicating frames, i.e. trial and error)

  I suspect I'm missing something basic around the relationship between perhaps input read rates, output frame rates, and number of frames to be included.

  Would appreciate any insights.

• FFmpeg converted mp4 file fails to load in Quicktime

  21 décembre 2015, par wonea

  I’ve been using FFmpeg to convert a movie I need to play in MP4, however in Quicktime the following error is presented ;

  

  (Error -2041 : an invalid sample description was found in the movie (output.mp4)).

  I used the following FFmpeg command parameters to convert the file ;

  C :\Temp\EOBTemp>ffmpeg -i input.mp4 -y
  -acodec libmp3lame -ab 96k -vcodec libx264 -vpre lossless_slow -crf 22
  -threads 0 output.mp4

  Now this file plays absolutely fine, in Windows Media Player, and VideoLAN (FFmpeg based, so no surprise here. I using the latest build from HawkEye’s FFmpeg Windows Builds
  (FFmpeg git-a304071 32-bit Static (Latest)).

  I really hope this isn’t a AAC problem, as I’ve been trying to get FFmpeg to use the libfaac.dll library (in the same folder as the FFmpeg.exe) with the command ;

  -acodec libfaac

  Help ! I’m at a loss !