Encodes incompatible videos from similar picture and audio files
|Reported by:||paheikki||Owned by:|
|Blocking:||Reproduced by developer:||no|
|Analyzed by developer:||no|
We use FFmpeg to create a number of short videos from pictures and sound files like this:
ffmpeg -loop 1 -t [length of Sound] -i Picture.jpg -i Sound.mp3 -acodec copy -pix_fmt yuv420p -c:v libx264 -profile:v baseline -tune stillimage -vf subtitles=Srtfile.srt Output.mp4
and then we concatenate them using GPAC. Even if all the input pics are of the same size, 640x480, their parameters can be different after FFmpeging, and this makes GPAC fail. Please see: https://github.com/gpac/gpac/issues/13
Mr. Romain Bouqueau promised to give more information to you if needed.
The only difference we have found out is that the metadata of the input JPEG files can be different because they have been created using different image editors. Please see the attachment. The bank picture does not have DPI information but most or all of the others do. It _seems_ that the video created out of the bank picture is incompatible with the others. The issue is about an aspect ratio flag even if the aspect ratios are equal.
Change History (26)
comment:6 by , 8 years ago
|Summary:||Encodes ncompatible videos from similar picture and audio files → Encodes incompatible videos from similar picture and audio files|
follow-up: 10 comment:9 by , 8 years ago
|Keywords:||mjpeg aspect added|
|Status:||new → closed|
|Version:||unspecified → git-master|