[AG-TECH] BTTV Capture & Mpeg / Large Video Size

[Douglas Kosovic]

Hi,

I've SVN checked-in a variation of Claus's grabber-v4l2.cpp patch for VIC.

New SVN snapshot VIC RPMs for RHEL/CentOS 5 and Fedora 8 & 9 are now available, just do a yum update. Let me know if you have any issues now with V4L2 and VIC.

The V4L issue about not being able to open the device appears to be a bug in the bttv driver of later kernels.


Cheers,
Doug

> Douglas Kosovic wrote:
> Looks like vic's V4L2 'large' only works with 4:3 704x576 PAL input
> sources, in the past the bttv driver would put a black border around a
> 704x480 NTSC source, but now when vic requests it, it doesn't
> succussed, vic's debug output:
> 
>   V4L2: failed to set format! requested 704x576, got 704x480
> 
> I think I'll try and do a variation of Claus's patch (which doesn't
> work with common UVC webcams that use 16:9 resolutions), so that it
> selects the nearest working resolution to 704x576.
> 
> 
> Cheers,
> Doug
> 
> > Claus Endres wrote:
> >
> > You might want to try the attached patch. It works for me for
> > webcams with NTSC resolution.
> >
> > Please let me know if it solves your problem.
> >
> > Regards,
> > Claus.
> >
> > Todd Zimmerman wrote:
> > > Hey All,
> > >
> > > Not sure if it is a local configuration/driver issue or not, but I
> am
> > > having problems producing 'large' video sizes using my BTTV capture
> > > card. It's a WinTV PCI card with a Sony handycam plugged into the
> > > s-video input.
> > >
> > > I'm using vic-2.8ucl1.4.0beta
> > >
> > > Here are my settings::
> > >
> > > V4L2 (BT878), SVideo, NTSC, Mpeg4, Large.  When I select
> 'Transmit',
> > > the stream 'info' still only indicates 352x288.   If I change the
> > > Signal to Auto (or PAL or SECAM) the picture goes green/pink but
> the
> > > resolution moves to 704x576.
> > >
> > > Is it _actually_ producing a larger video but the indication is
> > > wrong, or is it not capable of going above 352x288??
> > >
> > > I'd test V4L, but for some reason vic indicates it cannot open the
> > > device when trying to switch to v4l.
> > >
> > >
> > > Any thoughts?
> > >
> > > Todd