It should be fairly applicable to sources from 2.6.32 on through 3.7, with the possible note of the device number in cx2311.h. The following is a patch against a kernel source 3.6. has_417=1 defined in the driver, only /dev/video0 is created and is the uncompressed video. video1 becomes the uncompressed video output. video0 would be for compressed video, but nothing comes out of it. had_417=1 uncommented, two video device nodes are created, /dev/video0 and /dev/video1. Doing this and using the below patch but with the. If I don't do this, the cx231xx module will autoload on detecting the device, but the cx25840 module will not autoload, and the device doesn't function at all. Thus load the kernel modules for cx25840 and cx231xx before plugging in the device (#modprobe cx25840 modprobe cx231xx). When/if the hardware encoding is ever functioning, the cx25840 module seems to be also needed, however it wouldn't autoload in my experimentation. If not, it can be manually loaded (#modprobe cx231xx). Once the module is built and installed, the cx231xx module should autoload on detecting the device. So it should be supported in kernel 3.10 and later.įor earlier kernels, we need to add the device definition and some related details to the cx231xx driver and have installed the appropriate firmware (see below). īack: Mygica EZGrabber2 (top) & Diamond VC500Ī patch for this device has been accepted into to the 3.10 kernel. However examining the Windows drivers provided by the vendors, they refer to the device Polaris.CVBS or POLARIS.OTG102, and contain many of the same driver files as other devices containing the cx2 chips. However the indication that it can output compressed MPEG-4 video does suggest that it is not a standard cx2. There is no reference to this chip on Conexant's website nor practically the entire internet, so likely this is just a renumbered chip for these specific vendors. The single chip on the board is labeled as CX78921-11z. It has the standard USB 2.0 interface with stereo, composite video and S-Video inputs.
On Linux, using a patched cx231xx driver, it is at least possible to get uncompressed YUV4:2:2 video and 48000Hz stereo through the corresponding alsa device. Supposedly supports output of compressed MPEG-1/2/4 streams (on Windows). MyGica Capit MyGica Capit Old site Geniatech
MyGica/Geniatech USB EZGrabber2 and similar analog video capture cards DeviceĬX78921-11z, compatible with cx231xx Linux framework Please clarify if you have any of these products:
The EZGrabber2 device shares the Windows drivers for the similar devices Capit and EZGrabber, so likely much of the information will be in common with those.
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