Does 1.02 pro now decomb?

[FredThompson]

I'm running Heavy Metal NTSC (the 70s cartoon) right now and noticed the output is 24 fps and it sure looks like the IVTC processing was done. The original is 29.97 with the predictable 3:2 pattern of saw teeth from blended frames.

What's the deal, jdobbs? Even if you just faked the frame rate, there should still be those horrible sawtoothed edges. Did you put an auto-IVTC in the 1.02 pro release?

[jdobbs]

No. IVTC is never performed by DVD Rebuilder.

NTSC discs are all output at an intermediate frame rate of 23.976 as a common denominator (this is necessary in order to properly handle hybrid sources) and then the rate is set back to it's original state during REBUILD.

[FredThompson]

That's what I thought but I'm a little puzzled as to why the intermediate MPEG2 video has no sawteeth. Maybe it's related to how you do the forced 24 fps. I also noticed the options related to deinterlacing are gone. Don't even remember what those were...

[jdobbs]

It's possible the source is 29.97fps progressive. It's even more likely (since it came from a film) that it is 23.976 progressive. Often the combing effect you see on computer playback is the pseudo frames created by the pulldown and don't actually exist in the source. The pseudo frames wouldn't be there in the M2V playback because the pulldown flags haven't been applied yet (that is done in REBUILD).

[FredThompson]

Ah, that could be. I was loading with VirtualDub-MPEG to do a comparison with various filtering. I saw some really interesting thing comparing ProCoder and HC with filtering. MSmooth, DeGrain and PeachSmoother made a difference for HC but hardly any for ProCoder. It must be doing some interesting things inside. There was also a lot more corruption near edges with HC than ProCoder. Granted, this is a dirty source reduced to 1/2 "silver disc" bitrate and the test might have been a little unfair as ProCoder has 4 levels of quality and HC has 3.

Have you considered 2/3 D1 for the extras?

[jdobbs]

Unfortunately that's not DVD compliant -- and I'd really get slammed by the folks whose players wouldn't accept it.