[pvrusb2] Aspect ratio trouble

[Carsten Meier]

Am Tue, 1 Sep 2009 21:52:56 +0200 (CEST)
schrieb vdb128 at picaros.org:

> > > The controls ctl_crop_height and ctl_crop_top would allow to
> > > remove the=
> > =20
> > > black bars.  This cropping is done by the analog decoder.  A
> > > typical=20 PAL/625 letterbox frame is then 720x432 dot with an
> > > image aspect ratio =
> > 
> > > of 20/11 or 16/9.  Alas, this capability is not in the kernel and
> > > the=20 patches need to be ported to 2.6.29.
> > >
> > >  =20
> > So cropping is possible with 2.6.28 and some patches?
> > What patches?
> 
> Well actually the patch was for 2.6.25.  A copy is at 
> http://picaros.org/xorg/cropc.diff
> and a description of its logic should be in this list's archives.  
> 
> I would like to port this to 2.6.29 but am holding off a bit until I
> have news about a tiny patch submitted for 2.6.29 cx25840-core.c.
> 
> All this is only applicable to 24xxx devices.
> 
> Servaas

It would be very nice if this goes to the mainline-kernel.
Unfortunately one usually doesn't know if a movie is letterboxed in
advance, so the recording is already in progress if one knows the size
of the bars... VBI support would be so nice...

Carsten