VDub Interlaced --> CCE Interlaced --> Weird

[homerpez]

Here's what I'm doing...

I captured some TV at 640x480 using Huffy. 29.97 frames/second, and it's interlaced.

My intention is to frameserve it to CCE, to make a SVCD out of it, also interlaced.

I trim the duration of the clip in V-Dub, crop the video (since it has junk along every edge), and resize it to 480x480 (SVCD resolution).

I set up the frameserver to "signpost.avi" (to fool CCE into opening it directly), and it does.

I encode it, with only "End Code Sequence" as an option, so it should (should...) encode Interlaced MPEG-2 video... right?

Wrong...

I get progressive video, with interlaced artifacts... that is, it's not encoding "interlaced" format, so the lines just gunk-up the picture.

Is there something to select in V-Dub to somehow flag the video as "interlaced" source?

In CCE, I also tried both "field" settings, and both produce the same... progressive frames, with interlaced gunk cluttering them. All settings that would have CCE encode as progressive are UNCHECKED.

All my videos that I frameserved from TMPGENC --> CCE work perfectly, and play back Inerlaced, when resizing and encoding the same exact way. But V-Dub to CCE does this.

At which step did I go wrong?

[homerpez]

..anyone?

[crahak]

What exactly have you applied filter wise in vdub?

[homerpez]

Nothing, other than the simple resize (640x480 to 480x480), and cropping around the edge to eliminate some of the "fuzz".

No deinterlacing, no cleaning of the source video.

I'd like to be able to go the V-Dub to CCE route, because this way I can trim the capture easily (there are several points where there's commercials to cut out). TMPGEnc only allows me to choose a "start" and "end" point.

I can do the same cropping/resizing in TMPGEnc, and translates Interlaced --> Interlaced just fine.

[EddyH]

I know hardly anything about this stuff, I'm just wondering, did you only crop horizontally (ie cleaning off static along the sides of the pic) or vertically as well? If you've cropped a 480 pixels high pic vertically, then resized it back to 480 again, it's going to go wrong Better to either leave the gunk in, in the same overscan area that it was invisible in before, or mask it off with black instead of cropping.

(having seen far too many divxs that havent been deinterlaced before resizing and are now unfixable)

[homerpez]

I've found that I can't do what I want to in V-Dub, period.

I basically have to re-export the trimmed clip to a whole new AVI (direct stream copy) and then use TMPGEnc to crop/mask it off and resize using that file. Anything I do with V-Dub turns out wrong...

Same goes for Premiere... it must be I have the wrong setting or something, because using the CCE plugin also turns out the phony Interlaced material... only opening the AVI in TMPGEnc, specifying "Interlaced" source, and "Interlaced" output, actually works.

Thanks anyway, I have a fix now, just not an IDEAL fix...

[EddyH]

You could clip the file in VDub but then go on to export it as a direct stream copy?
That doesn't make much sense....

Did you try using the null transform filter to crop it off first, then mask/'letterbox' it back out to size with the resize filter? That may work...

Had some problems with getting films that were a bit offcentre back to the middle properly myself! Tricky stuff.