strange blending on ntsc source

[martinfrombern]

i'm currently working on a ntsc source which was made in ntsc country (usa). when trying to deinterlace/ivtc it, i realized that there is a bunch of blended fields there. i'd like to know what's the logic behind this, since as far as i know blends are usually find in pal->ntsc conversions and vice versa.
if i have to use srestore, how to find out what my final (correct) framerate should be.
you can find a small sample here (http://www.sendspace.com/file/c0ulfw).
thanks

[manono]

How about a 10 second unprocessed sample? We can't tell you what it is or advise on how to treat it unless we have a sample to play with. If you were sure what you had then you wouldn't be asking here, would you?

To answer the question, film field-blended to 29.97fps isn't nearly as common as film telecined to 29.97fps, but I've seen a decent amount of it.
if i have to use srestore, how to find out what my final (correct) framerate should be.
If the "base" framerate is really 23.976fps, then:

Yadif(Mode=1,Order=1)#or your favorite bobber
SRestore(FRate=23.976)

When I'm not sure, I sometimes do this:

Yadif(Mode=1,Order=1)#or your favorite bobber
SRestore(FRate=29.97)

and then start figuring out the dupe pattern.

[martinfrombern]

How about a 10 second unprocessed sample? We can't tell you what it is or advise on how to treat it unless we have a sample to play with.what's wrong with the one from the first post?

[manono]

what's wrong with the one from the first post?
I apologize. I didn't see it.

That one's the usual PAL2NTSC garbage, and wasn't made from an NTSC source (unlike your sample in the other thread). Even if it was filmed in an NTSC country, the master used for the NTSC DVD could (and did) come from a PAL source. Maybe the PAL DVD was released first and rather than spend money creating a real NTSC master, they just used the PAL one.

I've seen this several times. For example, several R1 NTSC DVDs of Japanese films (and it's an NTSC country) were made from PAL masters.

So, to unblend it put on a smart bobber followed by either the RePAL filter, or SRestore at default settings.