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The driver supporting this chipset is [http://www.linuxtv.org/wiki/index.php/Trident_TM6000 tm6000]. The kernel doesn't know the device in particular, but recognizes the chipset: <code>tm6000: Found Generic tm5600 board</code>. | The driver supporting this chipset is [http://www.linuxtv.org/wiki/index.php/Trident_TM6000 tm6000]. The kernel doesn't know the device in particular, but recognizes the chipset: <code>tm6000: Found Generic tm5600 board</code>. | ||
'''Grabbing video works fine.''' You plug the USB, you run "<code>mplayer tv://</code>" and you have the image, it's as simple as that if your kernel was compiled with <code>CONFIG_VIDEO_TM6000</code> (distribution's kernels are). With mplayer displaying the feed, it takes 20% of user space CPU on an AMD64 2GHz. | '''Grabbing video works fine in some circumstances.''' You plug the USB, you run "<code>mplayer tv://</code>" and you have the image, it's as simple as that if your kernel was compiled with <code>CONFIG_VIDEO_TM6000</code> (distribution's kernels are). With mplayer displaying the feed, it takes 20% of user space CPU on an AMD64 2GHz. | ||
The image is not very stable (it moves up and down a bit), but I don't know how stable is the source being tested. There is a green line at the bottom of the image. Supported video standards are NTSC (720x480) and PAL (720x576). | However, '''in some cases, it doesn't works fine''', one frame on two is not obtained right from the driver, and I have no idea why. The [http://moinejf.free.fr/ SVV V4L2 application], [http://www.mplayerhq.hu/ Mplayer] and [[Unicap]] get a correct image. [[GoQat]]'s V4L2 mode, qastrocam-g2 (not always?) and [[OpenPHD Guiding|open-phd-guiding]] seem to have a buffer problem in V4L2 mmap mode grabbing, and the image flickers. | ||
The image is not very stable (it moves up and down a bit), but I don't know how stable is the source being tested. There is a green line at the bottom of the image. Supported video standards are NTSC (720x480) and PAL (720x576), supported image formats are YUYV and UYVY. | |||
Warnings from the kernel "<code>xc2028 2-0061: Error: firmware xc3028-v24.fw not found</code>" must not be fixed as explained on the [http://www.linuxtv.org/wiki/index.php/Xceive_XC3028/XC2028 XC2028 page], because it crashes the driver, or at least it makes the device not work, I don't know why yet. | Warnings from the kernel "<code>xc2028 2-0061: Error: firmware xc3028-v24.fw not found</code>" must not be fixed as explained on the [http://www.linuxtv.org/wiki/index.php/Xceive_XC3028/XC2028 XC2028 page], because it crashes the driver, or at least it makes the device not work, I don't know why yet. | ||
Revision as of 02:26, 14 September 2012
TM5600 USB video grabber
This page explains how the Trident TM5600 chipset works in Linux, in particular with the following product that embeds it: KÖNIG CMP-USBVG6 (bought here 30€).
First of all, Trident seems to be well known for refusing to help coding free drivers and even disclosing information about the chipsets, so that's a good reason not to buy it in the first place.
The driver supporting this chipset is tm6000. The kernel doesn't know the device in particular, but recognizes the chipset: tm6000: Found Generic tm5600 board.
Grabbing video works fine in some circumstances. You plug the USB, you run "mplayer tv://" and you have the image, it's as simple as that if your kernel was compiled with CONFIG_VIDEO_TM6000 (distribution's kernels are). With mplayer displaying the feed, it takes 20% of user space CPU on an AMD64 2GHz.
However, in some cases, it doesn't works fine, one frame on two is not obtained right from the driver, and I have no idea why. The SVV V4L2 application, Mplayer and Unicap get a correct image. GoQat's V4L2 mode, qastrocam-g2 (not always?) and open-phd-guiding seem to have a buffer problem in V4L2 mmap mode grabbing, and the image flickers.
The image is not very stable (it moves up and down a bit), but I don't know how stable is the source being tested. There is a green line at the bottom of the image. Supported video standards are NTSC (720x480) and PAL (720x576), supported image formats are YUYV and UYVY.
Warnings from the kernel "xc2028 2-0061: Error: firmware xc3028-v24.fw not found" must not be fixed as explained on the XC2028 page, because it crashes the driver, or at least it makes the device not work, I don't know why yet.