Hello, a year ago I bought a device named "Hama Video Editor", which was not (and is not yet) supported by the em28xx driver. So I played around with the card parameter and got the device basically working with card=38. Basically working means, that I had a distortion when capturing old VHS-Tapes from my old vcr. The problem can be seen here: http://www.michael-ruettgers.de/em28xx/test.avi A few weeks ago I started tracking down the reason for this issue with the help of Devin. Wondering, that the device works perfectly in Windows, I compared the i2c commands, that programmed the register of the tvp5150 in Windows. Finally I got the device working properly, setting the "TV/VCR" option in the register "Operation Mode Controls Register" at address 02h manually to "Automatic mode determined by the internal detection circuit. (default)": 000109: OUT: 000000 ms 107025 ms 40 02 00 00 b8 00 02 00 >>> 02 00 After programming this register, the distortion issue disappeared. So my conclusion was, that the TV/VCR detection mode is forced to TV-mode in the em28xx, which could have been verified by a look into the debug output using the parameter reg_debug=1: OUT: 40 02 00 00 b8 00 02 00 >>> 02 30 Bit 4, 5 are used for setting the TV/VCR mode: Description in the Spec: > TV/VCR mode > 00 = Automatic mode determined by the internal detection circuit. (default) > 01 = Reserved > 10 = VCR (nonstandard video) mode > 11 = TV (standard video) mode > With automatic detection enabled, unstable or nonstandard syncs on the input video forces the detector into the VCR > mode. This turns off the comb filters and turns on the chroma trap filter. Thus far the tvp5150 distortion issues when capturing from vcr. ----------- The device not supported yet but mostly working with card=38 has the following features: 1 Button 1 LED 1 S-VHS input 1 Composite video input (Chinch) 1 Stereo audio input (2 x Chinch) The inputs are matched correctly to the video sources in a viewer-app (S-VHS -> S-VHS, Composite -> Composite1). It's product name is "Hama USB 2.0 Video Editor": http://www.hama.de/portal/articleId*139673/action*2563 This board has no unique USB ID but could be detected by its i2c devicelist hash "0x77800080": > [ 119.160182] em28xx: New device @ 480 Mbps (eb1a:2861, interface 0, class 0) > [ 119.160297] em28xx #0: chip ID is em2860 > [ 119.283595] em28xx #0: board has no eeprom > [ 119.300289] em28xx #0: Identified as Unknown EM2750/28xx video grabber (card=1) > [ 119.323789] em28xx #0: found i2c device @ 0xb8 [tvp5150a] > [ 119.332914] em28xx #0: Your board has no unique USB ID and thus need a hint to be detected. > [ 119.332917] em28xx #0: You may try to use card=<n> insmod option to workaround that. > [ 119.332919] em28xx #0: Please send an email with this log to: > [ 119.332920] em28xx #0: V4L Mailing List <linux-media@xxxxxxxxxxxxxxx> > [ 119.332922] em28xx #0: Board eeprom hash is 0x00000000 > [ 119.332924] em28xx #0: Board i2c devicelist hash is 0x77800080 This board seem to be branded under another name in Austria: http://lists-archives.org/video4linux/27246-empia-device-without-unique-usb-id-or-eeprom.html On Mon, Apr 20, 2009 at 9:06 AM, Anthony Hogan <anthony-v4l@xxxxxxxxxxx> wrote: > Aldi (Supermarket chain) Fission (home brand) USB hi-speed dvd maker > Aldi Product number/SKU: 6675 > Model Number: DK-8703 > Composite + SVHS video input > Stereo line-level audio input > Single button, single LED > No FCC ID (intended for Australian/European market, only has CE and "Tick" mark) ----------- I would appreciate to see this device beeing detected and working correctly for capturing even from a vcr with weak sync signals. Thanks. Regards, Michael Rüttgers -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
