[Mplayer-dvb] Slow performance on still scenes ?

[Martin Hoffmann]

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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