Nicolas George: > Steven Hartland (12022-07-02): >> I'm using concat to join multiple files from a GoPro camera including the >> three metadata streams, with the early return it fails as the metadata >> stream information is missing so map fails. > >> I believe the reason for the failure is that this early return prevents the >> metadata from being preserved. > > You are trying to trick concat into merging files with different streams > and match streams between them. It is not how concat is designed to > work, it might work in your particular test case but will not work in > more complex cases and will break other use cases. > > For example, with your change, if you concatenate a file with metadata > "start_time=12:00" and another with "start_time=12:01", it will generate > a file with both metadata entries instead of just the first one as would > be desirable. >
Actually, the newer entry will overwrite the older entry; if you want multiple keys with the same value, you have to use the AV_DICT_MULTIKEY flag. - Andreas _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
