Hans Verkuil wrote:
> On Saturday 19 April 2008 04:36:52 Andy Walls wrote:
> > In further testing I discovered a bug with the cx18 driver.  The
> > first analog capture after the cx18 module is loaded experiences
> > choppy audio and video, or no audio immediately with later onset of
> > choppy audio. Stopping the capture and restarting the capture
> > resolves the audio and video problem.
> >
> > Unloading and reloading the cx18 module allows one to reproduce the
> > problem at will.
> >
> > The symptoms are the same with mplayer or MythTV.
> >
> > The change sets going from 453e4817fc8f to 2ad00dbea1dd introduced
> > the problem.
> >
> > The second firmware load in cx18-driver.c:cx18_init_on_first_open()
> > seems to be the culprit.  However, eliminating that second firmware
> > load makes all the non-buffered captures played by mplayer (not just
> > the first capture) "suboptimal" in my subjective judgment of the
> > audio & video.  But these suboptimal captures are not nearly as bad
> > as the first capture when the second firmware load takes place.
> 
> Does it make a difference if you change '#if 0' to '#if 1' in 
> cx18-firmware_init()?

No.  The symptoms still persist - the first capture has choppy audio or
initially no audio and later onset of choppy audio.

-Andy


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