[mythtv] How to make sure v4l2 is being used (compile flag?)

[The Cyberwizzard]

I tried hardcoding it back to v4l2 but no avail - it still plunges into an 
infinity loop of errors :(

Starting up as the master server.
2004-11-29 20:41:36.955 mythbackend version: 0.16.20041126-1 www.mythtv.org
2004-11-29 20:41:36.955 Enabled verbose msgs : important general
2004-11-29 20:41:38.956 Found changes in the todo list.
2004-11-29 20:41:38.959 Scheduled 0 items in 0.0 seconds.
2004-11-29 20:41:38.961 Seem to be woken up by USER
2004-11-29 20:41:43.074 MainServer::HandleAnnounce Playback
2004-11-29 20:41:43.074 adding: cyberwizzard as a client (events: 0)
2004-11-29 20:41:43.098 MainServer::HandleAnnounce Playback
2004-11-29 20:41:43.098 adding: cyberwizzard as a client (events: 1)
2004-11-29 20:41:43.103 MainServer::HandleAnnounce Playback
2004-11-29 20:41:43.103 adding: cyberwizzard as a client (events: 0)
2004-11-29 20:41:43.118 MainServer::HandleAnnounce Playback
2004-11-29 20:41:43.118 adding: cyberwizzard as a client (events: 0)
2004-11-29 20:41:43.125 adding: cyberwizzard as a remote ringbuffer
2004-11-29 20:41:43.140 Changing from None to WatchingLiveTV
VIDIOCMCAPTUREi0: Invalid argument
VIDIOCMCAPTUREi1: Invalid argument
VIDIOCMCAPTURE0: Invalid argument
VIDIOCMCAPTURE1: Invalid argument
VIDIOCMCAPTURE0: Invalid argument
VIDIOCMCAPTURE1: Invalid argument
VIDIOCMCAPTURE0: Invalid argument
VIDIOCMCAPTURE1: Invalid argument
VIDIOCMCAPTURE0: Invalid argument

I've heard stories about ppl who had a working setup with this card but none 
of them actually know how they fixed it (tbh, most of them I don't even 
trust to know for sure they actually have a cx88 card).

Is there a way to get more info on this error? I tried setting verbose to 
lvl all but that didn't help...

Berend Dekens


>From: David George <david at thegeorges.us>
>Reply-To: Development of mythtv <mythtv-dev at mythtv.org>
>To: Development of mythtv <mythtv-dev at mythtv.org>
>Subject: Re: [mythtv] How to make sure v4l2 is being used (compile flag?)
>Date: Fri, 26 Nov 2004 17:43:55 -0500
>
>On 11/26/2004 05:21 PM, Martin Forssen wrote:
>
>>I see the same symptoms.
>>
>>On 24 Nov, David George wrote:
>>
>>
>>>Which buffer 0 and 1 errors are those?  Please post the error messages.
>>>
>>>
>>
>>2004-11-22 22:02:11.038 Changing from None to WatchingLiveTV
>>VIDIOCMCAPTUREi0: Invalid argument
>>VIDIOCMCAPTUREi1: Invalid argument
>>VIDIOCMCAPTURE0: Invalid argument
>>VIDIOCMCAPTURE1: Invalid argument
>>VIDIOCMCAPTURE0: Invalid argument
>>VIDIOCMCAPTURE1: Invalid argument
>>
>>and the last two lines repeats ad infinitum.
>>
>>
>Are you still seeing these now that you removed the using_v4l2 = false 
>hardcode from NuppelVideoRecorder.cpp?
>
>Just a cursory look at the code (I've never had occasion to look at nvr in 
>the past), I would guess that perhaps the initial height or width are out 
>of range for the VIDIOCMCAPTURE ioctl.
>
>>I realized why it is using v4l1. That is hardcoded on line 875 of
>>libs/libmythtv/NuppelVideoRecorder.cpp. The line was introduced in
>>version 1.182. If I comment out that line it works a little bit better
>>for me. I still have very bad picture (may be my antenna) and the
>>picture freezes every now and then (I will look into that).
>>
>>
>Yikes, that's not good.  It was probably left over from some testing that 
>someone was doing.  That line should probably be removed.
>
>--
>David
>
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