#8523: ffmpeg converts 30fps input to 29.97fps when converting to .mxf
------------------------------------+------------------------------------
Reporter: reakon | Owner:
Type: defect | Status: open
Priority: normal | Component: avformat
Version: git-master | Resolution:
Keywords: mxf | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
------------------------------------+------------------------------------
Comment (by Tjoppen):
Replying to [comment:10 reakon]:
> The closest to a spec I can find is a mention about IEC61937-14:2017
standard in kexoplayer's source code covering similar functionality.
Though, since rates for 30/1.001 an 60/1.001 are already defined, we can
calculate average rate for remaining 120/1.001 as such:
>
> {{{
> samplerate/framerate = samples/frames = 48000/(120/1.001) = 4004/10 =
400.4
> }}}
>
> Spreading it to 5 frames would give 2x 401 sample frames and 3x 400
frames. I'm not sure if these should be put in a specific sequence tho.
Alternating them similar to what is done now is probably OK, even if I
would like to see a spec. Please give the attached patch a go. I don't
have any suitable material for it, but it passes FATE at least.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/8523#comment:12>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
_______________________________________________
FFmpeg-trac mailing list
FFmpeg-trac@avcodec.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-trac
To unsubscribe, visit link above, or email
ffmpeg-trac-requ...@ffmpeg.org with subject "unsubscribe".
