[FFmpeg-devel] Is AV_TIME_BASE required to be a full millisecond?

[Michael Fabian 'Xaymar' Dirks]

Hello,

while tracking some time stamp issues unique to FFmpeg I noticed AV_Time_BASE(_Q) being present quite often, which appears to be a value to define time stamps in milliseconds. Tracking it back to its origin I could find very little to no information about why this value was chosen. All I know so far is that it was chosen for compatibility with very early versions of FFmpeg.

Does FFmpeg require this value to be a full millisecond? Or is it possible to adjust this to microseconds and "fix" many of the time stamp issues that occur? While it seems to be possible to work-around this issue on a muxer/demuxer level, the underlying issue in FFmpeg would still be present. At the moment, most non-integer ms framerates and sample rates end up performing weird without post-processing.

-- 
Sincerely | Mit freundlichen Grüßen

Michael Fabian 'Xaymar' Dirks