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Old 26 Apr 2003, 01:42 PM   #1
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Default Choppy AVI encoded from PAL interlaced DVD.

I'm trying to encode an AVI from my PAL DVD. I've followed many a guide on using DVD2AVI, AviSynth and VirtualDub, and they've served me well... except there's a choppy playback issue.

The resulting AVI is lovely quality, but a tad choppy/jittery/stuttery. You only notice this when the camera sweeps across a scene. Here's the AVS script I used (the MPG2Dec.dll & decomb.dll are auto-loaded):



I don't know what that Telecide and Decimate stuff means, but I got it from a guide that seemed to know what they were talking about. Plus, without those two lines, VirtualDub has the frame rate at 20fps. Lord knows why. I mean, the DVD vob's are 25fps interlaced, so why does VirtualDub open them and say they're 20fps?

Anyway, using the above script, I open my PAL DVD vob's in VirtualDub, apply a Brightness & SmartSmoother HQ filter, and off it goes. The resulting 2-pass AVI is nice (and 25fps), but it's still choppy.

Does anyone know what I can do to fix this?


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Old 26 Apr 2003, 05:34 PM   #2
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i suggest to try again WITHOUT decimate!

telecide should do some de-interlacing for you, but decimate might be the scapegoat for the little stuttering effect as it blends frames together in mode (1).

i doubt decimate is useful for pal sources.
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Old 10 May 2003, 02:55 PM   #3
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Originally posted by UncasMS
i doubt decimate is useful for pal sources.
Actually, there is a situation where it is useful. Sometimes 24fps gets "telecined" up to 25fps PAL by duplicating a frame. In such cases you need Decimate(cycle=25)!
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