[FFmpeg-trac] #4944(documentation:open): -r output option misguiding documentation
FFmpeg
trac at avcodec.org
Tue Oct 20 11:18:58 CEST 2015
#4944: -r output option misguiding documentation
-------------------------------------+-------------------------------------
Reporter: basinilya | Owner:
Type: defect | Status: open
Priority: minor | Component:
Version: git-master | documentation
Keywords: fps | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 1
-------------------------------------+-------------------------------------
Comment (by basinilya):
Replying to [comment:1 cehoyos]:
> The relevant output would be the one of {{{ffmpeg -i output.mkv}}},
FFmpeg's matroska muxer supports variable frame rate, so it is not
necessary to actually write the duplicated frames to the output file.
Please compare with a muxer that does not support vfr like {{{mov}}} or
use {{{-vsync cfr}}} to force the actual frame duplication.
Then how about we write something like this:
{{{
As an output option, set the declared video stream fps. Together with the
chosen '-vsync' method this affects duplicating or dropping frames.
}}}
Let them go and read the description of {{{-vsync}}} instead of
duplicating it here.
P.S.
Tested with {{{mov}}}: by default it really duplicates frames, but I did
the opposite to your advice and applied {{{-vsync vfr}}}, which produced a
vfr mov. So it does support vfr!
Found a cfr-only container: {{{yuv4mpegpipe}}}.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/4944#comment:2>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list