[FFmpeg-user] Concat Resulting in Delayed Audio

Carl Eugen Hoyos ceffmpeg at gmail.com
Wed Oct 17 19:40:16 EEST 2018

2018-10-06 4:23 GMT+02:00, VP Lists <lists at viaduct-productions.com>:
> Hi folks.  I’m performing a multiple-“.mov” concat which is resulting in
> delayed audio in the final output .mp4.
> I’m rendering temp MPEG-2 .ts files, then concatenating all of those into a
> final MP4 file.
> The final video has a lagging video, which eventually catches up by the end
> of the video.
> Is there a way I can fully encapsulate the intermediate files so that there
> is spot-on audio into the intermediate files, and then into the final MP4?
> Is MP4 the file type I should be sending to?  I can re-translate it
> post-concat, if need be.

> My STDOUT is here:
> https://gist.github.com/daBee/d4052da2a5be7a8ee121ae70eafebefe

This is missing command lines, making an analysis even more
difficult, but I don't think this approach can work in the general
case, only for some limited use-case.

Feel free to test with "-async 1" or provide files for testing, other
approaches likely exist.

Carl Eugen

More information about the ffmpeg-user mailing list