Attempting to use ffmpeg to split a very long mp4.
ffmpeg -ss 00:00:00 -t 00:30:00 -i WorkingSession.mp4 -acodec copy -vcodec copy WorkingSessionPart1.mp4
This provides about 89MB
Next I try this, notice the intentional time overlap
ffmpeg -ss 00:29:00 -t 00:30:00 -i WorkingSession.mp4 -acodec copy -vcodec copy WorkingSessionPart2.mp4
This provides about 163MB even though it should just be the last minute of the previous half hour mp4
The clue I get is at the start, of the 2nd one I get:
[mp4 @ 0xf48fc0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 @ 0xf48fc0] Codec for stream 1 does not use global headers but container format requires global headers
How do I bypass this, so as to split my mp4.
I have tried both -flags global_header, and -shortest:
ffmpeg -flags global_header -ss 00:29:00 -t 00:30:00 -i WorkingSession.mp4 -acodec copy -vcodec copy -shortest WorkingSessionPart2.mp4
but I still get the same error, and the much too long mp4 output file
Any suggestions?
