[mythtv] V4L2 bug ??

Shane Shrybman shrybman at aei.ca
Wed Feb 2 21:41:29 UTC 2005


On Wed, 2005-02-02 at 14:59 -0500, Isaac Richards wrote:
> On Wednesday 02 February 2005 11:29 am, myth wrote:
> > V4l2 appears to be valid only for cx8800 capture cards and falls back to
> > V4l for all other cards. I am using a BT878A capture card on a 2.6.8.1
> > md kernel which does support v4l2 but  NuppelVideoRecorder is using
> > this card via the V4l API rather than the V4l2 api. The V4l2 code in
> > NuppelVideorecorder is using a slightly more efficient way of performing
> > transfers (select).  A quick test, moving the brackets ( c code below)
> > allows the v4l2 code to be used resulting in a significant speed increase.
> 
> Last time I tested things, using the v4l2 api for bttv cards was significantly 
> less stable than using v4l.  Channel changes in particular seemed to kill 
> capture quite regularly.
> 

Seems stable so far. :) Is there some sort of channel changing stress
test that can be run? I am just flipping channels by hand now.

> Isaac

Regards,

Shane




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