{Gerd, latest test results at end of this post)
On Wed, 8 Jan 2003, Martin Braun wrote:
> >>My output of xvinfo is different form yours. Do you load the
> >>v4l module in XF86Config (Load "v4l" in module section)?
Mea culpea! My TVCard-equipped box was reinstalled with RH8.0 and v4l
wasn't loaded by default by the autogenerated XFree config file. Now I get
the video4linux adaptor when I do a 'xvinfo'
(I had Load "v4l" on another machine which didn't have any TVCapture
cards, so I never saw the video4linux adaptor entry before, and assumed
that everything was normal).
The only (minor) issue with 'Load "v4l"' enabled is that xawtv now
complains of a mismatch between S-Video and svideo (somehow the XFree86
v4l module strips out all non-alpha characters).
I've retested xawtv + old/new v4l2 etc. with Load "v4l" enabled, and this
is what I get:
1. Kernel 2.4.20pre11 + old v4l2 + 0.1.x saa7134 + xawtv 3.82 + NVidia4191:
-driver -xv/-noxv window fullscreen
---------------------------------------------------------------
v4l2 -xv Ok Ok
v4l2 -noxv xawtv error: No Video Grabber Device Available (!)
v4l -xv Ok Ok
v4l -noxv Ok Ok
[Mplayer 0.90-rc2 works fine]
2. Kernel 2.4.20 + new v4l2 + 0.2.x (Jan 2) saa7134 + xawtv 3.82 + NVidia4191:
-driver -xv/-noxv window fullscreen
---------------------------------------------------------------
v4l2 -xv Ok Picture has regular vertical
'tyre thread tracks' running
down the display
v4l2 -noxv B/W picture, 3/4 width, video image
slightly offset from window
v4l -xv Ok 'tyre thread tracks' visible
v4l -noxv No display visible (blank output window)
[Mplayer 0.90-rc2 has alternating green image display problem]
With the new v4l2 API and 0.2.x drivers in fullscreen mode, there are
regular missing pixels that resemble the marks left by tyre threads.
(Best way I know how to describe it). It's not totally static, and some
pixels can be alternatively filled or cleared in the black region
depending on the video content. This does not happen with the old driver.
T.C.
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Wan Tat Chee (Lecturer)
School of Computer Science, Univ. Science Malaysia,
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