Re: NDnet Test signals on Kevin's ftp site

On Sat, May 29, 2004 at 01:46:42AM -0700, [email protected] wrote:
> At 02:27 AM 5/29/2004 -0400, you wrote:
> >On Tue, May 25, 2004 at 05:44:44PM -0700, Bill wolf wrote:
> >> Play the test_resolution.ts file from stream player and notice
> >> how there is a black line outlining the left edge of
> >> the Zenith logo.
> >
> >When I run the HD1000's video output at 720p, I see the dark line
> >you're talking about.  When I run it at 1080i, the line _doesn't_
> >appear to be there.
> 
> I just tried it on my HD1000.  I get the same black line in vga 720p, vga 
> 1080i, vga 740p, comp 720p, comp 1080i.  It seems to do it in every 
> mode.

Here's something interesting: I had been using trympegdecode with
this patch from techtom to fix the scaling for 1080i:

--- trympegdecode-2004012501/trympegdecode.C	2004-05-29 17:13:44.000000000 -0400
+++ trympegdecode-2004012501-patched/trympegdecode.C	2004-05-29 17:14:26.000000000 -0400
@@ -92,7 +92,8 @@
 	appwindow.SetRectAbsolute(screen.GetRect());
 	appwindow.Materialize();
 
-	x=mdec->SetOutputAndScaleRects(screen.GetRect(),screen.GetRect());
+	CascadeRect hires(0,0,1920,1080);
+	x=mdec->SetOutputAndScaleRects(hires,hires);
 	printf("SetOutputAndScaleRects=%s\n",x?"true":"false");
 
 	x=mdec->SelectPIDs(false,pcrpid,vpid,apid,ac3);

If I set the HD1000 to 1080i (VGA) output, and play back the
resolution test with "trympegdecode -vpid 0x11 -apid 0x14", I don't
see any obvious black line on the left edge of the Zenith logo or the
animated red arrows.  As I mentioned before, any other mode that
requires scaling down the output does show dark lines.

I just tried streamplayer on the same clip in 1080i (VGA) mode.
It _does_ show a black line.

Streamplayer seems to be using the video scaler to shrink the image a
little below 1920x1080, unlike trympegdecode which (I believe) sends
it out pixel-for-pixel.  Perhaps streamplayer is doing this to account
for monitor overscan?  In any case it _is_ doing some scaling.  This
seems to go along with my suspicion that the scaler is to blame.

> >> The other file is the full 10minute recording from
> >> HDnet this morning (8am EST, 5/25/04).
> >
> >That one was not so good. It goes haywire around 8:15 and only very
> >rarely produces any sort of usable image for the remainder of the
> >recording.
> 
> Do you have something else you can try the clip on?

I've tried using streamplayer and trympegdecode on the HD1000, and
xine (software playback) on a desktop system.  All of them go haywire
when the counter on the screen hits 8:15.  xine emits the message
"libmpeg2: stream not demultiplexed ?"

> I'll download the clip from the site  and see if it is damaged.

I don't recall any errors when I unzipped it. FYI here's the md5sum
of the ts file on my system:

  7afb9ca0cd7e0b439040415f6f50c4e5  ref_test_sigs_all.ts

                                                  -Dave Dodge