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| Who | What | When |
|---|---|---|
| llldino | Hey guys, I'm having a problem viewing S-Video via a capture card using the cx231xx chipset. The output looks fine, but it is black and white instead of color. If anyone could help me out, I would very much appreciate it. I have a stack exchange topic here with more information: http://unix.stackexchange.com/questions/287609/s-video-has-no-color-output-for-cx231xx | [09:09] |
| .................. (idle for 1h26mn) | ||
| awalls_ | what input does v4l2-ctl show the unit being set to?
I'm guessing Composite (aka CVBS) v4l2-ctl --help will show all the options. you want the command line options regarding listing the inputs, the current input, and setting the current input. Also options for setting NTSC and/or PAL | [10:35] |
| llldino | awalls_, http://paste.debian.net/714661/
awalls_, S-Video is set, NTSC, | [10:50] |
| awalls_ | and your svideo signal is from an ntsc source, correct? | [10:52] |
| llldino | awalls_, It sure is | [10:53] |
| awalls_ | ok, well there go the simple solutions. | [10:53] |
| llldino | awalls_, Is s-video properly built into cx231xx? I read a long long time ago that S-video was never supported via cx231xx, but that was over 2 years ago | [10:54] |
| awalls_ | I have no idea. I know the chip is certainly capable of demodulation svideo
*demodulating the input mux of the internal cx25843 is probably just being set up wrong by the driver | [10:56] |
| llldino | Oh
I have these 2 lines in my dmesg: http://paste.debian.net/714662/ | [10:57] |
| awalls_ | the cx25840 driver handles most of the setup under direction of the main cx231xx driver. | [10:58] |
| llldino | I didn';t know that, I thought it was a rouge mod or something | [10:59] |
| awalls_ | that's the broadcast audio auto detection firmware not being loaded into the internal cx25843, which probably makes the cx25840 driver unhappy
I'm not sure. it's been a long time since I looked at any of this stuff. | [11:00] |
| llldino | Yeah, audio fails if I turn the source on and off, where do I dump the .fw | [11:01] |
| awalls_ | usually /lib/firmware
but the firmware only matters for tuner SIF audio. not baseband audio | [11:01] |
| llldino | Still, if dmesg is complaining | [11:02] |
| awalls_ | yeah. | [11:02] |
| llldino | SO that would have nothing to do with s-video right? | [11:04] |
| awalls_ | well it shouldn't, unless it prevents the cx25840 driver from responding to calls from the cx231xx driver. | [11:05] |
| llldino | i'll give it a reset, see if it loads | [11:07] |
| awalls_ | http://lxr.free-electrons.com/source/drivers/media/usb/cx231xx/cx231xx-cards.c#L643
the card definition in the driver for your card. at first glance it looks like someone knew what they were doing when they set up that definition | [11:07] |
| llldino | Okay, so that got rid of the one error, still left with:
[ 2.082246] cx25840 0-0044: Firmware download size changed to 16 bytes max length | [11:10] |
| awalls_ | that's just a warning you can ignore | [11:11] |
| llldino | Ok | [11:11] |
| awalls_ | http://lxr.free-electrons.com/source/drivers/media/usb/cx231xx/cx231xx-cards.c#L643
http://lxr.free-electrons.com/source/drivers/media/usb/cx231xx/cx231xx-cards.c#L643 | [11:11] |
| llldino | I don't know C :( | [11:12] |
| awalls_ | that's just a table in the driver describing how to set up your specific hardware
for Composite and SVideo | [11:13] |
| llldino | Ah | [11:13] |
| awalls_ | it looks like the author knew what they were doing at first glance.
but there might be an error in it, if you're having problems. and no one else can confirm working svideo gtg. good luck. | [11:13] |
| llldino | Thanks for your help! | [11:14] |
| .... (idle for 15mn) | ||
| Should note here as well, the audio problems I have may be related. Audio works fine, but when I turn the input off and then back on, it seems like the audio part of the driver fails and won't play it back anymore
No errors in dmesg or anything, still shows up as an input but no sound until I restart | [11:29] | |
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