I have 2 mp4 videos that fail to concatenate when using:
MP4Box -add 1.mp4 -cat 2.mp4 out.mp4
Is there a way to re-encode 2.mp4 so that the concat call will create a valid output? Possibly with ffmpeg? I can only re-encode one file and I want the concatenation to not do any encoding.
The error I currently get with these 2 files is:
[iso file] Box "minf" has 56 extra bytes Error appending 2.mp4: IsoMedia File is truncated