Dear all,
Context:
debian/lenny with usb frame grabber:
Zoran Co. Personal Media Division (Nogatech) Hauppauge WinTV Pro (PAL/SECAM)
This uses the usbvision driver.
The problem is that while xawtv works OK with color, v4lctl ONLY shows the frames
in black-and-white.
I understood that the usbvision driver needs some attention, e.g. a command like
"v4lctl setinput 2" is not working, it will keep using setting 0.
Because I need 2 (S-video) I patched the driver to always use 2 by setting
channel=2 in "usbvision_muxsel" to permanently select that channel.
With that usbvision module loaded I am getting pictures, but in BLACK_AND_WHITE,
as mentioned.
When starting "xawtv", it works fine!
With a simple opencv application I do an
CvCapture* capture = cvCaptureFromCAM( cnum );
...
cam = (CvCaptureCAM_V4L*)capture;
...
ioctl(cam->deviceHandle,VIDIOC_G_FMT,&format))
...
and find that the format is YV12, but the picture is black-and-white.
But YV12 is a color format.
The question is, how to get proper color pictures when using v4lctl or other
simple applications with this driver.
Thanks in advance,
Sietse Achterop
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