I have a Hauppauge PVR-150, with the S-Video input connected to an SD
DirecTiVo box. This is on a system running MythDora 5 -- "uname -r" reports
2.6.24.4-64.fc8 and "ivtvctl --version" reports "ivtvctl version 1.0.3
(tagged release)".
I'm seeing a small problem where enabling closed captions causes the top 10
or so lines to be cropped and the image shifted up, leaving ~10 lines of
black at the bottom.
I took a couple of screen shots to show the problem more clearly. I paused
the input source, 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.
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 would assume that this has something to do with VBI removal/cleanup. But
it's 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.
Ideally, I would like to have the VBI "junk" preserved and rely on the
monitor or player to handle the overscan, especially since I already have to
deal with that for my HDHomeRun. The next best thing would for VBI removal
(or whatever) to be done only once, yielding the "cc off" picture. By the
way, the MythTV WAF requires closed captions to be preserved...
Any ideas on this?
Jim
DirecTiVo box. This is on a system running MythDora 5 -- "uname -r" reports
2.6.24.4-64.fc8 and "ivtvctl --version" reports "ivtvctl version 1.0.3
(tagged release)".
I'm seeing a small problem where enabling closed captions causes the top 10
or so lines to be cropped and the image shifted up, leaving ~10 lines of
black at the bottom.
I took a couple of screen shots to show the problem more clearly. I paused
the input source, 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.
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 would assume that this has something to do with VBI removal/cleanup. But
it's 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.
Ideally, I would like to have the VBI "junk" preserved and rely on the
monitor or player to handle the overscan, especially since I already have to
deal with that for my HDHomeRun. The next best thing would for VBI removal
(or whatever) to be done only once, yielding the "cc off" picture. By the
way, the MythTV WAF requires closed captions to be preserved...
Any ideas on this?
Jim