Thread: [Libuta-develop] Problems with the libuta & SMPEG demo application

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Hi!

I'm having problems with the plaympeg demo. It plays all MPEG files much too
slow at about 1 fps.
Is this a bug or did I compile using some wrong settings?

Philip

Philip Stadermann wrote:
> 
> Hi!
> 
> I'm having problems with the plaympeg demo. It plays all MPEG files much too
> slow at about 1 fps.
> Is this a bug or did I compile using some wrong settings?
> 
1 fps is damned low. I guess this is a bug.

Could you send the version numbers of your installed SDL, SMPEG and
SDL_mixer  ?
What pixeldepth does your Xserver use ?
Also information about your hardware (graphics card, processor, RAM)
would be helpfull.

-- 
Karsten-O. Laux

> > I'm having problems with the plaympeg demo. It plays all MPEG files much too
> > slow at about 1 fps.
> > Is this a bug or did I compile using some wrong settings?
> > 
> 1 fps is damned low. I guess this is a bug.
> 
> Could you send the version numbers of your installed SDL, SMPEG and
> SDL_mixer  ?
> What pixeldepth does your Xserver use ?
> Also information about your hardware (graphics card, processor, RAM)
> would be helpfull.

SDL 1.1.1
SMPEG 0.3.4
I'm not using SDL_mixer. Is this a problem?

Computer:
Pentium 266 (not P2) laptop
some Neomagic graphics card
64mb ram
1024x768 16-bit 

The plaympeg tool from the smpeg library plays at full speed on my computer. 
The problem seems to result from the combination of smpeg and libuta. I've
added some debug output to the callback function screen_update in plaympeg.cc:
It's called only once per second and the refreshrect is almost instantly done.
So that can't be the problem.
SMPEG uses the SDL_delay function in timeSync (video/gdith.cpp). Maybe the
timer is screwed up and it waits too long (note that all frames are played,
they're not skipped).

sorry for this late reply, I have been quite busy the last week...

Philip Stadermann wrote:
> 
> > > I'm having problems with the plaympeg demo. It plays all MPEG files much too
> > > slow at about 1 fps.
> > > Is this a bug or did I compile using some wrong settings?
> > >
> > 1 fps is damned low. I guess this is a bug.
> >
> > Could you send the version numbers of your installed SDL, SMPEG and
> > SDL_mixer  ?
> > What pixeldepth does your Xserver use ?
> > Also information about your hardware (graphics card, processor, RAM)
> > would be helpfull.
> 
> SDL 1.1.1
> SMPEG 0.3.4
> I'm not using SDL_mixer. Is this a problem?
> 
hmm, I have not checked this combination, but will do so soon.
the current version of libuta had a bug in it's timer class, so the
Application class took too much cpu time ... this could have been the
problem.

I will upload the bugfix tonight to the cvs ... but this bugfix is only
a maybe-resolution for your problem - I will investigate on this.

> Computer:
> Pentium 266 (not P2) laptop
> some Neomagic graphics card
> 64mb ram
> 1024x768 16-bit
> 
> The plaympeg tool from the smpeg library plays at full speed on my computer.
> The problem seems to result from the combination of smpeg and libuta. I've
> added some debug output to the callback function screen_update in plaympeg.cc:
> It's called only once per second and the refreshrect is almost instantly done.
> So that can't be the problem.
> SMPEG uses the SDL_delay function in timeSync (video/gdith.cpp). Maybe the
> timer is screwed up and it waits too long (note that all frames are played,
> they're not skipped).
> 
Thanks for your precise information ... this will help a lot.

I guess the timer cannot be screwed since it is a system timer ... but I
guess since the smpeg runs in a seperate thread, the main thread may
suck too much cpu time and thus the smpeg thread runs much too slow...

-- 
Karsten-O. Laux

Thread: [Libuta-develop] Problems with the libuta & SMPEG demo application

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