decomb plugin and tv captures

[droolian01]

Hello there, i will appologise in advance if this is a stupidly obvious question.
I encode tv captures only (havent got around to dvd rips yet) using a bt 8*8 tv card. So far i have being using 'fielddeinterlace' as i assume that my raw avi's are by definition 'pure intelaced' sources.

But then thought - the film in the tv company studio has to be telecined for transmission, so do i have to use some form of progessive frame recovery like 'telecide' to rationally de-comb. I originally thought that telecide and the other funcions was purely for dvd rips only.

If it is the case that 'fielddeinterlace' is not enough, then how do u decide what to to - us tv stuff (??ntsc to pal) films (??24 fps to pal) uk tv stuff (??? just fielddeinterlace??)

Thanks in advance.
N.B. uk pal capturer

[hakko504]

When you capture PAL TV you are likely to end up with 3 distinct cases:[list=1]
Native PAL source: 50Hz interlaced material - use fielddeinterlace or smartdeinterlace.
FILM prepared for PAL. First use Telecide to make sure that fields are aligned. This will remove most interlacing but may leave repeated frames. In that case use Decimate(25) to get rid of them.
NTSC/FILM poorly converted to PAL: You will see blending effects even if you drop one field. Use as much smoothing as you can to get rid of some of the effects. This can sometimes even be the case with FILM content if the transfer has been made from a DVD source.
[/list=1]

So what to do? Follow this checklist: Remember to first open the captured video with suitable commands.[list=1] SeparateFields()
SelectEven()
Does this .avs have blending? YES means it is a poor NTSC transfer, use the normal resising and smoothing options. NO, continue with 2.
LoadPlugin("<path>\Decomb.dll")
Telecide()Do you get progressive output? NO then it is interlaced PAL, use fielddeinterlace. YES Good, now do you have repeated frames (1-in-25)? YES then add Decimate(25) to your .avs file. NO done.
Now you can encode the captured video with your normal method.
[/list=1]

[droolian01]

Wow, thanks for the info, not only answered my question about the nature of pal tv caps but provided some diagnostic .avs too, brilliant!

Can't believe i was that dumb to think that the otheoptions only related to dvd rips. Oh well only done a few tv captures (<10) and most of them were us or uk tv programs (not films) (buffy, 24, banzai etc) so its no wonder that they looked ok with fielddeinterlace only, cause thats what they needed! (after swaping field - crap capture card!!)

Thanks again for the help, and i'll definetly use your advice.

[hakko504]

You're welcome. Don't forget that most US TV is shot on film and should be treated as such.

[The Link]

@hakko504

I´m not experienced at topics like interlacing or IVTC. I live in a PAL-region and there´s only very seldom interlaced stuff I get to convert (I´m only talking about DVDs).
My question: Is your guide only capture-related or also suited for DVDs.

Thanks

[Divine]

You won't have problems with most pal dvds. Some however are *** up and then you have to use 1 of these methods.
1 *** up .uk dvd that i know of is Series 7 the contenders.

[The Link]

@Divine

You won't have problems with most pal dvds.
Yes, I know... ;)
Some however are *** up and then you have to use 1 of these methods.
That´s what I wanted to know! Thank you very much!! :)
1 *** up .uk dvd that i know of is Series 7 the contenders.
I only got problems with some clips on my Massive Attack DVD and with Buffy.

[Guest]

Gentlemen,

Please observe forum rules regarding profanity. Thank you.

[The Link]

@neuron2

Sorry!:(
Just a copy-paste-non thinking-act of quoting.:rolleyes:

[mc4_idea]

This is a great thread. How about NTSC? Anyone have pointers for that?

[hakko504]

@The Link

This will work with DVD's also.

@mc4_idea

NTSC is easier: just tryLoadPlugin("<path>\Decomb.dll")
Telecide()and if it looks OK then you just add Decimate(5) to remove the doubled frames. If nothing looks OK then you have to use fielddeinterlace() instead and if some parts are OK and some not then I recommend that you read this thread (http://forum.doom9.org/showthread.php?s=&threadid=14011) to find what settings you need to play with to get the best possible finish from a bad start.

[The Link]

@ hakko504

Thanks!!

[mc4_idea]

Thanks so much!