[mythtv] tracked down problems with fast-forward with pvr-350

Isaac Richards ijr at po.cwru.edu
Sat Nov 15 20:56:59 EST 2003


On Saturday 15 November 2003 08:44 pm, Ethan Sommer wrote:
> So, I found that if I comment out the contents of 
> VideoOutputIvtv::ProcessFrame(), I can fastforward, rewind, skip 
> commercials, etc. (it breaks a few other things, like OSD which I 
> expected, and exiting playing the video which I didn't expect...)
> 
> I could live without the OSD, but since it breaks more than that, I 
> wouldn't suggest my "patch" to others. So anyway, the problem is, I 
> _think_ that you can't just throw the OSD on top of a frame in an mpeg 
> stream (but you can when its paused) and the decoder is getting 
> confused. So, either mythtv needs to not display the OSD when the video 
> is moving, or it needs to do "clever mpeg stuff" to properly put the OSD 
> on, and then take it off when it should be gone.
> 
> I _might_ be able to track down why I can't exit the video playback 
> (hitting esc doesn't work) and turn OSD off all together, but it would 
> be nice if we could have OSD _and_ working doFastForward....

The code in videoout_ivtv.cpp is correct.  You are describing symptoms of a 
driver bug.  The current ivtv driver is fairly broken, and has been for a few 
days now.

Isaac


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