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Directions...

 

 

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linpvr at projectplasma

Feb 14, 2003, 7:00 AM

Post #1 of 5 (1761 views)
Permalink
Directions...

Kevin and I were having a disccussion off list (Ok, I was whining about work)
and we wandered into some project related topics.

[start exceprt]

> Once that's done, architecture for some sort of
> standard should come into play. I like v4l or v4l2..
> should probably also get RAW types working.. some apps
> prefer their data that way (though it's a waste of the
> encoder heh)

We should focus on stabilizing what works, we can play games after 1.0 :) As
far as framework goes, I think V4L2 will be our best bet. V4L doesn't cut it
and DVB seems, erm, complicated. I'm not opposed to adding additional
application API's but we should choose one and let somebody else add the
others. Probably should discuss it with the application guys (Videolan,
MythTV, tvtime, etc.), since I didn't really get a definitive answer from the
v4l list.

[end excerpt]

Hey Videolan guys, do you have a preference? :)

Thanks,
John



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titer at videolan

Feb 14, 2003, 7:41 AM

Post #2 of 5 (1672 views)
Permalink
Re: Directions... [In reply to]

> > Once that's done, architecture for some sort of
> > standard should come into play. I like v4l or v4l2..
> > should probably also get RAW types working.. some apps
> > prefer their data that way (though it's a waste of the
> > encoder heh)
>
> We should focus on stabilizing what works, we can play games after 1.0 :)
> As far as framework goes, I think V4L2 will be our best bet. V4L doesn't
> cut it and DVB seems, erm, complicated. I'm not opposed to adding
> additional application API's but we should choose one and let somebody else
> add the others. Probably should discuss it with the application guys
> (Videolan, MythTV, tvtime, etc.), since I didn't really get a definitive
> answer from the v4l list.
>
> [end excerpt]
>
> Hey Videolan guys, do you have a preference? :)

Well, I don't know kernel APIs enough to be sure ;)

I agree DVB is probably too complicated for PVR boards, one great thing in
V4L is that any program can get the MPEG stream very easily (this is how the
Kfir board currently works, which is quite convenient compared to satellite
cards). AFAIK V4L2 features /dev/codec devices so it could be the best
choice, although V4L may work as well.

--
Eric Petit <titer [at] videolan>


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ptkatchouk at shaw

Feb 14, 2003, 10:55 AM

Post #3 of 5 (1669 views)
Permalink
Re: Directions... [In reply to]

> far as framework goes, I think V4L2 will be our best bet. V4L doesn't cut
it

I agree with v4l2 choice.

Pavel.




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nufan_wfk at yahoo

Feb 14, 2003, 11:10 AM

Post #4 of 5 (1665 views)
Permalink
Re: Directions... [In reply to]

> others. Probably should discuss it with the
> application guys (Videolan,
> MythTV, tvtime, etc.), since I didn't really get a
> definitive answer from the
> v4l list.

I've actually asked the mythTV guys (who i have a lot
of respect for) about it, and isaac said the best
route is probably to just write a plugin for mythTV to
stick mpg frames into his wrapper one at a time.

I've already coded initial support for a "give me one
frame" type api command. That'll be the first API
command i write once i get the driver stable.

Soon I will ask the mythtv list if someone wants to
code the userspace part for me :) MythTV was the main
reason i started working on this project.. But don't
worry, i won't stop once it's supported :)

As for the others, it'd be easiest for me if we could
get a rep from those projects on this list. John, you
seem to have a pretty good feel of what's out there..
would you mind asking those groups to pop in?

My own impression is that v4l2 is probably the best
generic standard right now.. I don't like that it's an
extra step-to-download/patch kernel/compile kernel
though.

-tmk

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stain at acm

Feb 15, 2003, 4:39 AM

Post #5 of 5 (1668 views)
Permalink
RE: Directions... [In reply to]

Hey Videolan guys, do you have a preference? :)

As kind of a freevo guy ( http://freevo.sf.net ) I would
prefer v4l2, too. However I will start writing a plugin
for the existing stuff since I don't want to wait for a
driver ;-)

l8r...
Thomas



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