Hans Verkuil wrote: > Hi Cyrus, > > Can you test with the latest version from subversion? > (http://ivtvdriver.org/viewcvs/ivtv/trunk.tar.gz?view=tar) > > That's much more interesting for me. The video glitches should be > completely fixed in that version. But I'm still not certain how well > the closed captioning works. > > Why the vbi tool would fail with 0.8.0 is beyond me, I see no reason for > that. I'll wait and see what your experiences are with the trunk ivtv > version. > > Thanks, > > Hans > > On Saturday 04 November 2006 19:12, Cyrus A wrote: > >> So I just upgrated to FC6 to test out the new 0.8.0 (and SVN) >> versions of ivtv and discovered some interesting things: >> >> First, I had problems compiling. The fedora core 6 kernel-devel >> layout is screwy. You have to "touch" the file >> /usr/src/kernels/2.6.18-1.2798.fc6-x86_64/include/linux/config.h to >> get ivtv (and nvidia, it turns out) to compile. >> >> After I got ivtv to compile, I tried simply "cat /dev/video0 > >> file.mpg" which worked fine. The picture was crisp and clear. >> >> Next, I tried adding a closed caption process. the >> $ivtv_home/test/vbi program did not work for me. I kept getting a >> message saying "vbi: Device or resource busy". So I tried using >> zvbi-ntsc-cc (part of the zvbi package) and had some success. As with >> previous versions of ivtv, starting and stopping a closed captioning >> process sometimes causes glitches in the video. >> >> This where it gets confusing, though. I haven't been able to pick out >> a pattern to how the glitches appear, whether they disappear or >> persist, or what the glitches will look like if and when they do >> come. One thing is certain: starting and stopping zvbi-ntsc-cc in the >> middle of a recording is much more risky in terms of causing glitches >> than starting the zvbi process before you begin recording and >> stopping it after you end recording. >> >> I've noticed three types of video glitches: >> >> 1. The momentary black flash >> >> Appears only once across the top or bottom half (approx) of the video >> when starting or stopping a zvbi-ntsc-cc process. Seems to happen >> more when starting as opposed to stopping zvbi-ntsc-cc. >> >> 2. The persistent black flash >> >> Appears across the top of the video when starting or stopping >> zvbi-ntsc-cc but continues to flash a few times every second for as >> long as you keep recording. Seems to happen when the first black >> flash is more pronounced and a fraction of a second longer than in >> #1. Also happens more when starting vs stopping zvbi-ntsc-cc. >> >> 3. The momentary psychedelic flash (the "moving" portion of the video >> goes all crazy colors for a split second, then returns to normal) >> >> This happens pretty rarely and can happen with zvbi-ntsc-cc running >> in the background (it doesn't need to be started or stopped to >> produce this). >> >> Other notes: Changing IVTV_VBI_PIO to "1" in drivers/ivtv-driver.h >> locked my system twice. It was something Hans and I had used to get >> 0.7.0 working on a 2.6.17 kernel. I guess that doesn't work anymore. >> >> In short: test/vbi is broken. IVTV_VBI_PIO will crash your computer >> and the video, while normally clean, can get messed up by a closed >> captioning process. >> >> Cyrus >> >> >> _______________________________________________ >> ivtv-users mailing list >> [email protected] >> http://ivtvdriver.org/mailman/listinfo/ivtv-users >> > > _______________________________________________ > ivtv-users mailing list > [email protected] > http://ivtvdriver.org/mailman/listinfo/ivtv-users > Forgot to mention, these were with the latest SVN. I started with 0.8.0 then switched to SVN in the middle. The results were identical.
Cyrus _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
