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• avformat/ape : Use 64bit for final frame size

  22 mai 2024, par Michael Niedermayer

  avformat/ape : Use 64bit for final frame size
  Fixes : CID1505963 Unintentional integer overflow
  Sponsored-by : Sovereign Tech Fund
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/ape.c

• FFmpeg concatenation, no Audio in Final Output

  12 septembre 2016, par user4889724

  I have the following command working in ffmpeg, which adds 1 second of a black frame to the beginning of the video. However, I lose the audio from the original video in the output video. How can I adjust the command to make sure the original audio stays with the final output, or better yet, there is 1 second of "blank" audio at the beginning so it matches the new output video.

  ffmpeg -i originalvideo -f lavfi -i color=c=black:s=1920x1080:r=25:sar=1/1 -filter_complex "[0:v] setpts=PTS-STARTPTS [main]; [1:v] trim=end=1,setpts=PTS-STARTPTS [pre]; [pre][main] concat=n=2:v=1:a=0 [out]" -map "[out]" finaloutputvideo.mp4

• VLC cant read some audiotracks created by ffmpeg

  18 juin 2021, par skanarr

  I have two different .mkv files of the same movie. One contains the English, German, Italian, Spanish and French audio and subtitle tracks, the other contains Japanese Audio and Subtitle tracks. Since I want to have all tracks in one file I tried to 'merge' them using ffmpeg.

  


  $ ffmpeg -i Movie.mkv -i Movie_jp.mkv -map 0:v -map 0:a -map 1:a:2 -map 0:s map 1:s:1 -map 1:s:2 -map 1:s:3 -c:v copy -c:a copy -c:s copy tmp.mkv


  


  Full Command Output from ffmpeg
That is the command I used and even though it took a while, I got my tmp.mkv.
However Playing it in VLC none of the Tracks from Movie_jp.mkv are working properly.
There are short periods where there is audio and then it is gone again for some minutes.
Also tmp.mkv freezes at 4:44 and freezes VLC for some time, before only audio continues top play.
Looking under Messages this is what I got

  


  main error: module not functional
main error: failed to create audio output


  


  Then a bunch of warnings
and a ****load of

  


  main error: Timestamp conversion failed (delay 1000000, buffering 100000, bound 9000000)
main error: Could not convert timestamp XY for FFmpeg
main warning: early picture skipped


  


  And finally

  


  main error: buffer deadlock prevented


  


  (All Message from VLC )
I don't know what I did wrong. The Japanese tracks are working in Movie_jp.mkv.
The all non-japanese Tracks are still working in tmp.mkv.
Also there are working Tracks with the same codecs on tmp.mkv (dts) as well as subtitles (pgs).