>
> 2. S-Video input gives a grainy picture with the saa7134-0.1.5/2.4.19-pre4
> config. This does not occur with the saa7134-mar11-snap/2.4.19-pre3ac3.
> What I mean by grainy is that the color intensity seems to be
> modulating along the scan line.
>
There is a change in 0.1.5 which disables the luminance comb filter for S-video
input,
but this should actually fix the problems you are describing and not causing
them.
I tested this change and this made a big visual improvement (which I did not
expect to be big)
on my board for both PAL and NTSC.
What happens if you press pgup or pgdown in xawtv while looking at S-video?
I briefly tested the change of Gerd last wednesday and I noticed that sometimes
I had
to press pgup or pgdown (channels swithing) for the change to have effect. I've
not yet
given Gerd feedback about this, as I did not have the time to have look at this
if this
was a real problem because I was on a course for 2 days. I will check this on
monday.
What happens if you temporary disble this change?:
--- saa7134-video.c.1 Sat Mar 23 10:46:41 2002
+++ saa7134-video.c Sat Mar 23 10:52:54 2002
@@ -429,8 +429,10 @@
mux = card_in(dev,dev->ctl_input).vmux;
luma_control = norm->luma_control;
+#if 0
if (mux > 5)
luma_control |= 0x80; /* svideo */
+#endif
/* setup video decoder */
saa_writeb(SAA7134_INCR_DELAY, 0x08);
> + vmux: 8,
What happens if you change the input mode (vmux) for S-Video from 8 to 6?
mode 6: Y channel with automatic gain control, C channel with fix gain (GAI2).
mode 8: Y channel with automatic gain control, C channel linked to Y-channel.
Gert
