[Mplayer-dvb] Slow performance on still scenes ?

[Martin Hoffmann]

Mhhh
using lavc=2 or btter lavc=3 seems to "cure" the problem !

However using these "lower" quality setting reduces the picture quality 
slightly - is there a method mplayer could dynamically vary between lavc=1..3 
depending on the complexity of the source video ?

Martin

Am Dienstag, 21. Mai 2002 23:45 schrieben Sie:
> Any news on this ?
>
> Any new ideas, how to solve ?
>
> It's quite annoying when the stutter effect appears :-(((
>
> Latest cvs seems to have same "problem" (if i'm allowed to call it this :-)
> ...
>
> Martin
>
> Am Montag, 6. Mai 2002 21:19 schrieben Sie:
> > Mhhh,
> >
> > i have played around with various values - but i'm afraid anything i
> > tried made it even worse :-(
> >
> > Increasing the value (+0.2 and above) lead to lower framerate !? Somehow
> > the visible output fps dropped below 25 fps ... using +1 even lead to 1
> > fps slideshow ...
> > Too Low values (beginning at around -0.05) lead to "hang-ups" while
> > playing - only seeking could cure the freeze (sound and video freezed) !
> >
> > However i had the feeling that -0.02 was a little better that +-0 - but
> > not good enough the stuttering was quite audible !
> >
> > However i cut the scene out of the movie - where it's quite visible and
> > audible and i am currently uploading the clip to mplayerhq's ftp - the
> > file is named stutter.avi and is around 6MB of size !
> > The problem occurs at around 7 seconds where the audience of a football
> > game is shown and a little bit at 15 secs where a helmet of a football
> > player is shown !
> > When watching this clip, don't get confused with the obvious slow motion
> > scenes at the beginning, where the back of guy named phoenix is shown...
> >
> > btw: Playing this clip with video out on Xserver and audio out via oss
> > the clip plays just fine ... however i cannot test with -vo mpegpes and
> > audio via oss - since my dvbs box hasn't a soundcard :-/
> >
> > I hope this can help to solve this problem - it's quite annoying, since
> > everything else is quite perfect :-)
> >
> > Martin.
> >
> > Am Sonntag, 5. Mai 2002 17:30 schrieben Sie:
> > > Hi,
> > >
> > > > But with -vop lavc the picture quality is much better !
> > > >
> > > > Any idea ?
> > > > I have tried several AVIs and it's all the same - only scenes with no
> > > > or ver y
> > > > low motion and high contrast (black white or Snow and sky and stuff)
> > > > - also it seems to happen with high detailed scenes ...
> > >
> > > high detail scenes needs much more bits - so such frames are big.
> > > probbaly they don't fit into DVB card's small buffer (256k?) so you get
> > > buffer underrun -> sound breaks.
> > >
> > > find this in ao_mpegpes.c:
> > >
> > > static int get_space(){
> > >     float x=(float)(vo_pts-ao_data.pts)/90000.0;
> > >     int y;
> > >
> > > and try to add -1..+1 offset to x, for example, try:
> > >
> > >     float x=(float)(vo_pts-ao_data.pts)/90000.0 + 0.2;
> > >
> > > it needs some experiencing with various values - tell me if you find a
> > > good one.
> > >
> > >
> > > A'rpi / Astral & ESP-team
> >
> > _______________________________________________
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> > Mplayer-dvb at mplayerhq.hu
> > http://mplayerhq.hu/mailman/listinfo/mplayer-dvb
>
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