[mythtv-users] Cropping with PVR-150

Jim Stichnoth stichnot at gmail.com
Wed Oct 8 22:25:56 UTC 2008

On Wed, Oct 8, 2008 at 3:18 PM, Brad DerManouelian
<myth at dermanouelian.com>wrote:

> On Oct 8, 2008, at 3:10 PM, Scott Kidder wrote:
> On Wed, Oct 1, 2008 at 11:40 AM, Jim Stichnoth <stichnot at gmail.com> wrote:
>> I took a couple of screen shots to show the problem more clearly.  I
>> paused the input source (an SD DirecTiVo), then ran either "v4l2-ctl -b cc"
>> or "v4l2-ctl -b off" to turn closed captioning on or off, and then captured
>> a frame using xine.  If you flip back and forth between the two images, it's
>> clear that the first several lines are being cropped and everything shifted
>> up when cc is enabled.  It's also interesting that even with the uncropped
>> picture, the VBI stuff has apparently already been removed.  If I had to
>> guess, I would say that VBI removal is being done twice when cc is on.  (I
>> would prefer that VBI were not removed at all, so that MythTV overscan or
>> whatever could be applied consistently to all inputs.)
>> cc on: http://www.flickr.com/photos/37377999@N00/2905480460/sizes/o/
>> cc off: http://www.flickr.com/photos/37377999@N00/2905480878/sizes/o/
> I have an identical problem with recordings made on my PVR-150 through the
> composite inputs.  Mine matches the 'CC On' image.  I'd basically given up
> on this problem until I saw your message!  For what it's worth, here's the
> IVTV output for my PVR-150 card:
> Have you tried asking on the ivtv mailing list? This is clearly an ivtv
> issue and they would be much more knowledgeable about why this is happening.
> It looks intentional to me, but I don't know why.

Being new to MythTV, I only recently learned the relationship between mythtv
and ivtv.  I'll find the ivtv list and pursue it there.  Thanks for the

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