[FFmpeg-devel] [PATCH] libavformat/movenc : Change MOV_TIMESCALE from 1000 to 600

[Mark Burton]

On 18 Mar 2018, at 07:52, Mark Burton <mwjburton at gmail.com> wrote:
> On 14 Mar 2018, at 23:20, Michael Niedermayer <michael at niedermayer.cc <mailto:michael at niedermayer.cc>> wrote:
>> for other cases 600 is less accurate
>> for example input that uses timestamps in ms precission
>> like flv
>> but also 30000/1001 will be less precisse
> 
> In the case of a Quicktime encoder, a 30000/1001 frame rate encode would still have a Movie Header timescale of 600, but a video track timescale of 2997. Since ffmpeg allows us to specify the video_track_timescale, this output could still be achieved.
> 
> As for flv and formats that use ms precision, I’ll freely admit thats not something I work with so am not in a position to comment. However, would these formats not also have the benefit of the current flag to set video_track_timescale?

Or go with 1200, which is more accurate for ms precision formats and also works for all major frame rates.