[Mplayer-dvb] Slow performance on still scenes ?

[Martin Hoffmann]

Could you please try lavc=3 or even 4 and 5 ??

I have tested these values and 4 seems to work for every movie producing this 
effect so far !
However lavc=4 has also some (very rare visible) blocking artefacts :-/ But 
thats okay, as long as the stutter is gone :-)

I guess best would be a dynamic lavc=1..5 depending on the source - but i'm 
afraid that this won't be too easy !

Martin

Am Sonntag, 26. Mai 2002 11:58 schrieben Sie:
> Hi Martin,
>
> got the same problem here, even with a 2,2 GHZ P4 CPU !!!!
> But right now I only know one of my film producing this
> effect. In my case it happens in a scene, where many black
> lines are drawn on a white paper and the whole picture
> moves because of camera motion.
>
> Tilo
>
> > 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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