Which version of mythtv is this? CVS? 0.16? I just hit what may be the same problem in setting up an ATI TV Wonder last night - also cx88xx based. The yuyv conversion is a piece of logic that changes the frame buffer format on the fly. It's definitely there, but it also stack allocates a large buffer to do the conversion and from looking at the source I suspect the buffer may be too small for the incoming frame buffer size. I'm not entirely sure of the specifics yet, but I did note that the "default" size was 352x240 and when I changed the software encoder's setting to 352x240 the segmentation fault went away and Live TV started working. Try changing that and see if it helps.
This is the bug I just wrote up about the problem: http://www.mythtv.org/bugs/show_bug.cgi?id=189 By the way, if/when you do get LiveTV working, are the colors trashed and the picture washed out? That's a second problem I noticed. It appears that the contrast has to be backed off to around 35%, and the Hue setting seems to have been implemented to think that the Hue V4L2 parameter is an unsigned char when in fact it's behaving like a signed char. Setting Hue to 0 or 100% will fix the colors. (Set the _recording_ Hue, not the playback Hue.) -Mike On Tue, 11 Jan 2005, El Draper wrote: > Hi guys, > I've been setting up a Linux PVR using MythTV on a Fedora Core 3 > machine, with a recompiled 2.6.9 kernel (to fix some wifi issues). I > have a Hauppauge WinTV PCI tv card (CX88) and have successfully got the > program Zapping working with it, and capturing video etc. I have > configured MythTV, grabbed program listings etc, setup some channels; > however whenever the backend starts to record something I've setup to be > recorded, I get the following error: > > 2005-01-11 02:39:17 Changing from None to RecordingOnly > 2005-01-11 02:39:17 Using profile 'Default' to record > 2005-01-11 02:39:17 Commercial Detection initialized: width = 480, > height = 480, fps = 25, method = 1 > NVR: v4l2: format set, getting yuyv from v4l, converting > > [2]+ Segmentation fault mythbackend -v all > > Now (from what little I know) yuyv is some form of codec? Could it be > that Myth has a missing dependency for this on my machine that is > causing this error? I have noticed that in trying to setup my channels > with the correct frequencies, I don't see anywhere for the exact > frequency in Mhz ("finetune" and "freqid" are int's). How can I setup a > channel with an exact frequency in Mhz? Could this be causing the above > problem when trying to record? > > I've searched around, so far unsuccessfully on this problem, so any help > you guys can offer would be great as I'm now a little stuck :-) > > Thanks! > > -= El =- > _______________________________________________ > mythtv-users mailing list > [email protected] > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users > > -- | Mike Isely | PGP fingerprint Spammers Die!! | | 03 54 43 4D 75 E5 CC 92 | isely @ pobox (dot) com | 71 16 01 E2 B5 F5 C1 E8 | |
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