VHS capture and interlazing problem

[repo]

Hey,

I'm in the middle of the process of transferring old PAL VHS movies to DVD and have had no problems so far. I record with VirtualVCR to a HuffYUV avi in 720x576 resolution and crunch everything through an AVS script along the lines

AVISource()
ConvertToYV12(interlaced=true)
Telecide(order=1,guide=2)
+ crop, resize, and border stuff


Yesterday, however, I ran out of luck. When I look at the raw AVI
recording it seems as if the whole clip consists of randomly placed
parts of alternating interlaced and progressive frames. In succession, you'd have, say

20 interlaced frames
2 progressive
12 interlaced
5 progressive
32 interlaced
19 progressive

etc.

There is absolutely no periodicity in this (at least to my judgment).

(*) At the point were you go from an interlaced to a progressive frame it appears that the progressive frame also is combed into the
interlaced frame just before.

When you look at the output from the AVS script it looks OK, but a
closer inspection shows that several frames are repeated which gives a very jerky playback on the DVD player. This is probably due to the
fact described under (*).

Also, debug output from Telecide(order=1,guide=2,post=3,show=true)
tells me that everything is being handled as interlaced (combed)
frames.

OK, hope this is enough info. If anybody has any clue on how to
proceed from here, please let me know.

Best, Mads

[Wilbert]

(*) At the point were you go from an interlaced to a progressive frame it appears that the progressive frame also is combed into the interlaced frame just before.

When you look at the output from the AVS script it looks OK, but a closer inspection shows that several frames are repeated which gives a very jerky playback on the DVD player. This is probably due to the fact described under (*).
Could you cap the same stuff in mjpeg and upload a clip somewhere (50 frames or so)?

If you apply SeparateFields to your clip, does it show ghosting?

[repo]

Thanks for caring,

Thing is, it turned out that the VHS tapes in question, actually can be rented from my local library on DVD, so I think I'll just proceed from there.

From a technical point of view, it'll of course be nice to look further into this. I'll have to see if I can find a place to put a representative clip for you to download. Let you know when this is set up.

Best, Mads