[MPlayer-dev-eng] [PATCH] further dvr-ms playback improvements

[John Donaghy]

I've been thinking about creating a new patch that will improve native
dvr-ms playback in mplayer  with respect to jerky playback. I believe
I can do this now without looking at the codec becasue I've found a
way to extract the 'average time per frame' from the container for
each stream.

I'm proposing using this value to deduce the framerate for the video
stream and then modifying video.c at line 583 to only consider the pts
if the fps is 1000. Ie if the asf parser can provide the fps then
ignore the pts (note the fps isnt guaranteed to be there for all asf
files because it is in the header extension object - but it is there
for dvr-ms at least).

Can anyone comment on whether or not this approach will be acceptable?

On the subject of obtaining good pts values, I've tried very hard to
see if they can be obtained from the container without success. There
are pts values there but they are not precise enough for smooth
playback though they seem ok for seeking. I've examined the replicated
data included with each segment/payload but I cannot see an obvious
pts value in there - there's no public documentation on what this data
means so it's a bit hard to get anywhere with it.