On Mon, 2008-06-30 at 11:13 +0200, Levente Novák wrote: > On Sun, 2008-06-29 at 16:11 -0400, Andy Walls wrote: > > > OK. The video you sent clearly shows that the cx2584x chip locks onto > > the vertical sync, but that it isn't locking onto the horizontal sync > > pulses.
> > I'm going to assume your VCR doesn't put out PAL-N compatible CVBS but a > > but PAL-BDGHI compatible CVBS. > > > > If the OSD from that particular VCR is really that important to you, > > there are some things that could be tried by tweaking the CX25843 > > registers, if they aren't set already (turning on a +12 dB gain, forcing > > PAL-BDGHI over PAL-N, etc.). It would be helpful to see what the > > registers are set at when you have the OSD display problem and when you > > are playing a tape. > > > > As root, for those two scenarios, if you provide the output of: > > > > # v4l2-dbg -R type=i2cdrv,chip=cx25840 > > > > Please find the output attached, however I provide only 1 stdout and 1 > stderr file instead of two, since the logs are identical for the static > OSD and for the tape being played (so I assume it will not help much). You appear to have the correct syntax, but the command needs to be run as the "root" user to get any useful output for me. If you did run it as root and your card is at a device node other than /dev/video0, you'll need to add the "-d /dev/videoN" argument to the command, where "N" is the proper number for the ivtv card of interest. > One more thing: what is the exact color standard for VHS tapes in a > PAL-BG land? I know for the TV it is PAL-BG but is it the same for the > tape? Maybe specifying it manually would help. >From my research the biggest difference between letter standards are parameters of the RF modulation. The letters make less of a difference to the baseband video signal which the VCR records and outputs. > In the meantime, after I wrote the previous paragraph, I experimented a > bit with the PAL/SECAM modes with v4l2-ctl. PAL-B/G/H were better than > PAL-D/I/K and much better than PAL-M/Nc/60. As it turns out, the baseband video signal for PAL-BDGHI should be the same. PAL-N/Nc certainly has different sync and blanking levels. I can't recall for PAL-M. PAL-60 has a different, 60 Hz vertical refresh rate than the normal 50 Hz for PAL, and is never used over the air. It is extremely unlikely that your VCR would output PAL-60. > The first group gave a > non-striped, uniform blue screen (but with horizontal lock problems as > for the latter two groups). Moreover, all SECAM types were as good as > PAL-B/G/H! I think the biggest difference with SECAM over PAL is how the sound is modulated in the RF signal. Maybe the color is done differently too, I can't recall the details. > The next step will be to try to extract as much information as possible > from under Windows. Also please try to dump the cx25843 registers again. > Thanks for your patience and help! Regards, Andy _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
