[mythtv] Re: [mythtv-commits] mythtv commit: r7076 by danielk

Doug Larrick doug at ties.org
Fri Aug 19 11:12:57 UTC 2005


Mark Spieth wrote:
> mpeg2 seek support in libavformat is not as good as it should be as it has
> no knowledge about keyframes. hence my fudge of seeking mpeg1/2 at least 15
> frames before the frame desired so that it hits a keyframe on its way to
> getting the actual frame being sought. This is not a problem if using myths
> seeking DB table as keyframe locs are stored explicitly.

Keyframes can be much further apart than 15 frames in ATSC content.
I've seen as much as 120 frames(!) on 720p material.  Just FYI.

-Doug
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