Telecide Reducing Vertical Resolution?!?

[zilog jones]

I'm using Telecide to try fix my phase-shifted progessive PAL captures from VHS sources. It seems to work OK, but I've noticed that on stationary things like TV station ID logos it seems the vertical resolution has been halved. On one logo where there were previously 1-pixel-high white horizontal lines, after telecide these lines were blurred with the surrounding black, or in some instances not there at all! What's going on?

Why would telecide need to reduce the vertical resolution at any time to do 2:2 IVTC? The picture is vertically stable when this happens, so it's not the possible problem that it's trying to blend fields that are moving vertically or anything. I can't really see if this is happening anywhere else on the screen - it's quite hard to tell.

And I'm not in a position to remove the logos or anything - they're quite big, and unfortunately totally opaque :mad: . And their destination will be DVD, so I can't crop them either.

[Mug Funky]

try disabling telecide postprocessing. that is if you're sure you don't need it.

you could also have it send hints to another deinterlacer - FieldDeinterlace (telecide's method) isn't the best out there.

kerneldeint and Tdeint can take hints. i'd use Tdeint, but if you're going that far you probably don't need telecide at all as Tdeint will match the fields too.

[zilog jones]

Tdeint, eh?

The help file's got too much stuff in it though. How do I make Tdeint simply fix the phase-shift and do nothing else? Or will doing that lead to weird artefacts?

[zilog jones]

I tried Tdeint - it seems to do the actual de-interlacing part better, but it's still messing up the vertical resolution somehow. I've got pictures this time:

This is the original:
http://www.skynet.ie/~zilog/pics/2original.png

After TDeint:
http://www.skynet.ie/~zilog/pics/2kdeint-bad.png

Sometimes it looks OK like here:
http://www.skynet.ie/~zilog/pics/1kdeint-good.png
But as you may see there's combing there (it's also elsewhere on the frame).

When it appears to be de-interlacing properly (but messing up the vertical res.), I also get these weird artefacts - most noticeable on borders like here:
http://www.skynet.ie/~zilog/pics/weirdness.png
Before using TDeint, that line was solid. The same artefacts appear when using telecide. I thought it could have been due to wrong field order, but I tried both ways and it was pretty much the same.

What am I doing wrong?!?

My script was simply:
avisource("g:\cap\cap4.avi")

tdeint(order=1)

[zilog jones]

OK, I found a solution after giving up with TDeint:

telecide(order=1, guide=2, post=0)

It was the post-processing that was messing everything up. The slight combing I was seeing was just interlaced noise. And this solved another problem that could have proven very annoying - the titling and credit scrolls in the show I was capturing were interlaced, but with post off it left them interlaced and just shifted the phase of the interlaced footage along with everything else. Yay!

[scharfis_brain]

are your captures statically phased shifted, or do the shift all of the time between progressive and phase shifted progressive?

if it is static, just use

doubleweave().selectodd()

for correction.

[zilog jones]

It's statically phase-shifted, but I think I tried that before and it didn't work for some reason... maybe I did the wrong field order.