[vlc] v4l demuxer error: chroma selection failed with saa7134 driver

[fred]

Hi all,

I have a TV card which works fine (saa7134), with tvtime for example,
via a freebox through a peritel cable (on /dev/video0).

I use too a quickcam pro 4000 with vlc, on /dev/video1,
which works fine too :

vlc v4l:// :v4l-vdev="/dev/video1" :v4l-adev="/dev/dsp1" :v4l-norm=3
:v4l-frequency=-1

I want to watch TV (so /dev/video0) with vlc (0.8.4), through the peritel :

vlc v4l:// :v4l-vdev="/dev/video0" :v4l-adev="/dev/dsp"

but it fails with message
v4l demuxer error: chroma selection failed.

In fact, verbose vlc gives more info :
[00000269] main input debug: set input option: v4l-vdev to /dev/video
[00000269] main input debug: set input option: v4l-adev to /dev/dsp
[00000269] main input debug: set input option: v4l-norm to 0
[00000269] main input debug: set input option: v4l-tuner to 1
[00000269] main input debug: waiting for thread completion
[00000269] main input debug: `v4l://' gives access `v4l' demux `' path `'
[00000269] main input debug: creating demux: access='v4l' demux='' path=''
[00000270] main demuxer debug: looking for access_demux module: 1 candidate
[00000270] v4l demuxer debug: V4L device ADS Tech Instant TV (saa7135) 3
channels 0 audios 48 < w < 720 32 < h < 578
[00000270] v4l demuxer debug: invalid width 0
[00000270] v4l demuxer debug: invalid height 0
[00000270] v4l demuxer debug: setting channel Television(0) 1 tuners
flags=0x1 type=0x1 norm=0x0
[00000270] v4l demuxer debug: invalid tuner, falling back on tuner 0
[00000270] v4l demuxer debug: will use 720x578
[00000270] v4l demuxer debug: v4l device uses brightness: 32896
[00000270] v4l demuxer debug: v4l device uses colour: 33026
[00000270] v4l demuxer debug: v4l device uses hue: 32896
[00000270] v4l demuxer debug: v4l device uses contrast: 35090
[00000270] v4l demuxer debug: v4l device uses frame size: 624240
[00000270] v4l demuxer debug: v4l device uses chroma: I420
[00000270] v4l demuxer warning: I420 refused
[00000270] v4l demuxer error: chroma selection failed

Why i420 is refused ?
What does it means ?

PS : vlc 0.8.1 core dumps.

Thanks in advance.

-- 
Fred.

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