Battle Royale: How can I deal with this source?

[SuprSonik]

I'm trying to encode Battle Royale, and I have a problem. DGIndex reports it as pure NTSC/Interlaced @ 29.97FPS. It's strange though, because aside from a few interlaced frames here and there, there is no interlacing whatsoever. What it does for example, is frame 2001 and 2002 are the same, 2003-2006 are different, 2007 and 2008 are the same, etc. Every 5th frame is the same as the next 1 frame.

Now I was easily able to get around this (or so I thought) by just forcing film in DGIndex. It did the job and got rid of the duplicate frame. At first, anyway.

When I open up the d2v through avisynth in VirtualDubMod I never get any duplicating frames in the first few minutes so that all 1-2-3-4 frames are different. But then something happens, and when I look later on in the film, it will be all jerky and the 1 and 4 frames will be identical. Sometimes I imagine the 1 and 2, 2 and 3, & 3 and 4 frames get that way too. I think it has something to do with the odd times in the source when it looks as though it were truely 3:2 material (3 frames progressive, 2 interlaced) which throws it off.

I almost don't know how to explain it, I'm so confused :( I'm still kinda a newbie to Avisynth, but I couldn't find anything that seemed to apply to my situation. Does anyone know what I can do to force Avisynth to detect when there is a duplicate frame and delete it?

Thanks.

[foxyshadis]

You should never force a film without pulldown flags, because it'll just drop 1 in every 5 frames randomly. But you can just run Decimate() on it, if it really is as you describe, with a very conservative deinterlacer for the stray combing. If it's not, a Telecide/Decimate or TFM/TDecimate combo is probably what you really want.

If those don't work, you'll need to post an unprocessed clip from the source to get better help.

[SuprSonik]

I feel like a dope. Decimate() alone did the trick. I was trying with some different parameters (it's been a while since I've used Avisynth or encoded anything to be honest) and if I had just went with the default everything would have been good.

Thanks just the same though, I don't know how long I would have been stuck on that otherwise :o