Kia ora Dave, > Some audio encodings don’t support arbitrary sample counts, so it’s not > uncommon that the audio and video encodings of a file has minor fluctuations > in their duration. Also video and audio sampling rates often has different > timebases so it’s usually not feasible for their durations to be the same. > For instance you may have a second of 48000 Hz audio, but it is not possible > to have one second of an NTSC (30000/1001 fps) recording. > So for instance concatenating a segment of video + audio with another segment > of video + audio would be more accurate, then concatenating 2 audio encodings > and separately concatenating 2 video encodings and then hopefully that they > will still align.
Yes, it makes total sense that audio & video streams should be specified as such, so that everything stays in step. Thank you for the confirmation. > No unless you provide that black slug. In this case the duration of the last > frame will be longer to cover the missing video. Thanks. That command is a perfect demo. > If you know what you want the output to be then you should clarify, otherwise > it leaves the guesswork to ffmpeg which may or may not be want you want. Haha, got it. Cheers Dave, I really appreciate your thoughtful answers! Best, K _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
