Hans Verkuil wrote: > On Wednesday 08 March 2006 19:26, Bob Cottingham wrote: >> I have a problem with my PVR-150 having low saturation. > > It works perfectly fine for me, so that makes it harder to track down. > > But first check that MythTV is not involved by doing the following test > (done with ivtv-0.4.3, also please supply the START INIT IVTV-END INIT > IVTV log):
Here is the init msg for the PVR-250s: http://bobnvic.com/pvr250init.txt Here is the init message for the PVR-150: http://bobnvic.com/pvr150init.txt > Run ivtvctl -Y for the pvr150 and the pvr250 and check that brightness = > 128 and contrast and saturation are both 64. Hue should be 0. There > should be no difference between the pvr150 and pvr250 regarding these > values. The ivtvctl -Y command gave the same result for the PVR-250s and the PVR-150, however brightness was set to 127 for both and contrast and saturation were set to 63 with hue set to 0. > Now tune both the pvr150 and 250 to the same channel and capture a bit. > Compare the two mpegs. If they clearly differ (some differences are > normal, for me the pvr150 is actually somewhat more saturated than the > pvr350) then I'd like to have the output of ivtvctl --log-status for both > the pvr250 and 150 while both are capturing, and either the mpegs > themselves or a screenshot taken from these mpegs. The PVR-150 capture was clearly under-saturated compared to the PVR-250. Here is the ivtvctl --log-status for the PVR-250: [4319587.028000] ivtv0: ================= START STATUS CARD #0 ================= [4319587.028000] saa7115 0-0021: Audio frequency: 48 kHz [4319587.030000] saa7115 0-0021: Video signal: broadcast/DVD [4319587.030000] saa7115 0-0021: Frequency: 60Hz [4319587.030000] saa7115 0-0021: Detected format: NTSC [4319587.030000] ivtv0: ================== END STATUS CARD #0 ================== Here is the ivtvctl --log-status for the PVR-150: [4437938.571000] ivtv0: ================= START STATUS CARD #0 ================= [4437938.579000] cx25840 0-0044: Video signal: present [4437938.579000] cx25840 0-0044: Detected format: NTSC-M [4437938.579000] cx25840 0-0044: Detected audio mode: forced mode [4437938.579000] cx25840 0-0044: Detected audio standard: forced audio standard [4437938.579000] cx25840 0-0044: Audio muted: no [4437938.579000] cx25840 0-0044: Audio microcontroller: running [4437938.579000] cx25840 0-0044: Configured audio standard: BTSC [4437938.579000] cx25840 0-0044: Configured audio mode: undefined [4437938.579000] cx25840 0-0044: Specified standard: NTSC-M [4437938.579000] cx25840 0-0044: Specified input: Tuner [4437938.579000] cx25840 0-0044: Specified audio input: Tuner [4437938.579000] cx25840 0-0044: Specified audioclock freq: 48 kHz [4437938.579000] cx25840 0-0044: Preferred audio mode: stereo [4437938.579000] cx25840 0-0044: Selected 65 MHz format: system DK [4437938.579000] cx25840 0-0044: Selected 45 MHz format: chroma [4437938.579000] wm8775 0-001b: Input: default [4437938.579000] ivtv0: ================== END STATUS CARD #0 ================== These may not be the best examples. I had thought that a cartoon would best show off saturation differences, but that doesn't actually seem to be true as animated shows probably have more saturation to begin with. I may try some other captures that better reflect what I'm seeing, but these are already done. Here is a link to the screenshot for the video capture from the PVR-250: http://bobnvic.com/pvr250capture.jpg Here is a link to a screenshot from the video capture from the PVR-150: http://bobnvic.com/pvr150capture.jpg I can also make the video available if needed. > I'd also appreciate it if people with a pvr150/500 and a pvr250/350 in > NTSC country can do a similar comparison and post the result. All I > need to know is whether there are major saturation differences and the > tveeprom messages in the kernel log of the pvr150/500. Thanks for looking at this. Please let me know if you need anything else. Bob C _______________________________________________ ivtv-devel mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-devel
