Can't find info, please help

[Mike <mike (at) redtux.org.uk>]

On Sat, 2007-02-10 at 23:20 +0100, Hans-Peter Guggenbichler wrote:
> Hi guys and gals!
> 
> Sorry to introduce myself with a most probably dumb question,  but I couldn't find the answer 
> to that anywhere. 
> 
> I got me a Hauppauge Wintv PCI FM tv tuner card and put it into my PC. (Reasonably quick
> machine, Using Debian etch). The goal was to create DVD's from my old climbing videos.
> Got me tvtime, mplayer, mencoder and everything is working. But .. I am not satisfied with
> the quality of the captured videos (I comparison with my old TV set, Video Player is the same). 
> I then played a lot with different video drivers, filters and switches but I never got a satisfying 
> result. 
> 
> I tried to explore how things are working, but I never get the big picture.
> 
> The big question to me is: WHO DOES ALL THIS PROCESSING? 
> 
> what confuses me most:
> When I change resolution: Does the driver just tell the tv card controller to provide the
> data stream in the new resolution. Is the data stream from the tv card always the
> same and the the driver does the new resolution? Or is it the application? 
> I never saw a increase of load on the cpu when I selected  a high resolution, altough the 
> picture starts bucking in tvtime.  That brings into my mind, that the tv card does the work. 
> On the other hand, I can't select resolution within v4l2ucp.
> 

I would be really,really surprised that there is no increase in load.
For example I use ffmpeg to capture and at 352x288 loads is 17% and at
720x575 is approx 60-70%

Are you sure you are actually capturing at increased resolution

> So please, someone enlight me,
> best regards,
> Hans-Peter, Austria (PAL,625 lines)
> 
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