[linux-dvb] Re: Generating progressive video

[Michael Hunold <hunold@convergence.de>]

Hello Michael,

On 02/17/04 15:33, Michael Plagge wrote:
> On Tue, 2004-02-17 at 14:35, Michael Hunold wrote:
> > On 02/16/04 23:38, Michael Plagge wrote:
> >
> > Anyway, what solution (ie. which gfx adapter) do you have in mind to put 
> > the result to your beamer via DVI?
> Especially for this i have bought a matrox G450 with dvi-out since this
> is the card which seems to be supported best by DirectFB and other
> software using framebuffers (mplayer, xine, etc.). Therefore i want to
> use the matrox gfx driver.
Have you checked if the DVI output is actually supported?

> The fact the the FF-card performs digital => analog => digital
> conversion is totally new for me and also a little bit surprising. It
> seems that my initial idea of having a fully digital chain is not so
> easy to implement.
If you omit the full-featured card and use software mpeg-decoding or 
something like the cle266, the you can have a fully digial chain.

> Do you think it is reasonable to use a DXR3 card for hardware decoding
> (as you can see i like the idea of hardware-decoding). The main reason
> for preferring hardware-decoding is to circumvent the syncing problems
> you are describing in the IDEAS-File in cvs.
You cannot manipulate the video after you've send the mpeg data to the 
dxr3 decoder. There is no way to get the decoded video frames back (like 
via Video4Linux with the DVB cards). If you don't have a hardware mpeg 
decoder that actually implements your ideas of interlacing (which I 
think doesn't exist), then you have to use software mpeg decoding.

> As you can see from my comments, i just start playing around with these
> problems and maybe i am a little bit naive, but while reading you
> comments there was an idea coming into my mind. Do you think it could be
> possible, if i do the hole thing (software mpeg decoding and
> deinterlacing) in software, to use the movement vectors from mpeg2 for a
> motion adaptive deinterlacing algorithm (i hope this idea is not too
> silly) 
Adaptive interlacing is a CPU burner already. It's probably a good 
academic research topic if the motion vectors can be used for 
deinterlacing, but I doubt that this will ever work for live tv.

> best wishes
> michael plagge
CU
Michael.


--
Info:
To unsubscribe send a mail to ecartis@linuxtv.org with "unsubscribe linux-dvb" as subject.