Re: [Mplayerxp-general] mplayerxp and stuttering

[Prakash P. <pr...@pu...>]

Nick Kurshev schrieb:

>>
>>I will try what you suggested, but I don't think it will help. I am using a
>>geforce2 gts card with nvidia binary driver and agp at 2x, so I am pretty sure
>>that "busmastering" is used, if it applies to agp. (Or do you know something
>>more about it? How can I def. test whether it is the case? I just notice that
>>using opensource nv driver, much more cpu is used when playing video through
>>xv, that's why I thought, the binary driver uses busmastering.) I noticed if I
> 
> Using of OpenGL guarantees us that busmastering is active. xv may use but may not use
> this feature. nvidia's xv may just have mmx optimization and less stupid design
> unlike opensources X.org drivers.

Unfortunately -vo sdl -forcegl doesn't work on that machine. It says something
about not finding a suitable glx visual or alike.

> 
>>enable fastwrite and sba, cpu time in mplayer goes a bit down, bit still not
>>enough.
>>
>>Keep in mind that cpu is not the problem with mplayerxp! Unfortunately I can't
>>set the Hz to something else than 50Hz, so I am stuck here. :-(
>>
>>If I understood your comments above correctly, then -xv vo in mplayerxp
>>shoulbe be the same as mplayer - beside the predecoding of course. (If this is
>>not the case, couldn't this be done? IE, output frames as mplayer does, but
>>keep the predecoding for lower cpu usage?) Nevertheless mplayerxp's timing is
> 
> predecoding always eats cpu slightly more than singlethreading design


CPU usage is *not* the cause of the stuttering!!! As I said I get *heavy*
stuttering (on 60Hz display)  with 25fps dvd and slight stuttering with low
complexity 29.97 fps mpeg4, I strongly assume mplayerxp doesn't properly sync
the output. CPU usage in those clips is <20% !!! Mplayer is perfectly smooth,
though. That's why I want mplayerxp give out frames as mplayer does concerning
the syncing method, but still do predecoding.

Please forget cpu usage as cause for stuttering. It is something else!


>>wrong while mplayer's isn't. Any idea how to fix this? Above suggestion would
>>probably fix the situation for me.
> 
> try:
> mplayerxp -vo YYY your.movie -benchmark -frames 1000
> and
> mplayerxp -vo YYY your.movie -benchmark -frames 1000 -xp 0
> and compare resulting lines in both cases.

Well, I get some numbers but I have no idea what they are trying to tell me...
Nevertheless I don't think they'll help...

Cheers,

Prakash