Hi! I have a Hauppauge HVR-1300 which I currently intend to use for capturing analog cable tv, because of the hardware mpeg encoder. There are three problems, which might or might not be related: 1) mpeg stream from hardware encoder breaks off or is corrupted (I can't tell which) after a while 2) screengrabber image gets corrupted after a while 3) changing resolutions causes mpeg encoder stream to become completely inoperable I've made sure to reproduce all problems with an untainted 2.6.32 kernel (package linux-image-2.6.32-trunk-amd64 version 2.6.32-5 from ubuntu). 1) mpeg stream from hardware encoder breaking: After setting a channel with ivtv-tune -d /dev/video1 -t europe-west -c E6 I can play the mpeg stream e.g. with mplayer -nofs -vo x11 /dev/video1 -cache 8192 but after a while (ranging from a few seconds to several minutes (up to five, I think)) the video stream seems to break off. mplayer shows a freezed frame, there's no sound. Sometimes mplayer will terminate with "end of file". The same happens when I do cat /dev/video1 > test.mpg and play test.mpg with mplayer, however the test.mpg file still grows, so there's some output from the device, mplayer apparently just isn't able to play it. I still get end of file with this file, even though mplayer displays it's 7 minutes or longer, just the first minute will be played. I've unloaded the modules and reloaded them with modprobe cx2341x debug=1 modprobe cx88_blackbird debug=1 video_debug=1 mpegbufs=32 in order to get some debug output in dmesg. dmesg output was pastebinned at http://pastebin.com/f60ad5dcc since it's too long for this list. (In case you're curious about the backtrace in the beginning, I uploaded the start of syslog at http://pastebin.com/f3bac25d7 I'd also like to know if it might indicate problems.) 2) corrupted image from screengrabber: There are also problems with the framegrabber on /dev/video0. When I watch analog tv directly (with mythtv or tvtime), after a while (again a few seconds up to a few minutes), the picture shrinks to an area in the upper right corner. In the lower parts there are sometimes moving artefacts. If I run a tail -f on syslog I see nothing, but this time I didn't give any debug options to the modules (also I was using an older kernel, tainted by the fglrx driver. If you want, I can reproduce this with the untainted 2.6.32 again.) I've uploaded a screenshot from tvtime to http://dudelab.org/~taupan/tvtime-output-22:45:53.jpg xawtv display looks very weird... as if every eighth line was shifted by about a 16th of its width or so. Example image at http://dudelab.org/~taupan/snap-viva-20100117-142327-1.jpeg (I used roughly the same xawtv configuration with an ancient hauppauge card from 1997 which I used successfully until recently.) 3) broken resolution switching: When I switch resolutions in mythtv recording profile, but also via e.g. v4l2-ctl -d /dev/video1 --set-fmt-video=width=720,height=568 I seem to totally break the encoder. There's no stream any more, ~> cat /dev/video1 cat: /dev/video1: Input/output error And switching the resolution back doesn't help. Unloading the modules doesn't help either, I have to reboot the box. dmesg output pastebinned at http://pastebin.com/f4e27757a Tests were done with a 2.6.32 kernel from ubuntu. Please ask if there's any information you can't easily infer from this mail or the attached logs. Kind regards Friedel -- Friedrich Delgado Friedrichs <friedel@xxxxxxxxxxx> TauPan on Ircnet and Freenode ;) -- 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
