Quick question about progressive/interlaced encoding

[mp3dom]

Hi!
I have a doubt. I am not sure about some encoding options.
I have a PAL 4/3 film.
At the beginning I've encoded this film in Interlaced mode, Top Field and Alternate Scanning Order. The output is Ok, no jerky video (so fields are correct).
With VirtualDub MOD I've opened the source (for curiosity) and i've seen that the video doesn't have the "interlaced" lines (the scanlines). So to be sure I've made 2 AviSynth scripts... one with AssumeTFF and one with AssumeBFF. Both scripts gave me same results (no jerky video in both scripts) so I'm assuming this is a full progressive 4/3 movie. Can this be true? Can i encode this video with Progressive Frame flag and ZigZag scanning order in CCE?
Thanks!

[DDogg]

I ran into this the other day with a source called 'GoodFences'. DG told me it was 'hard telecined'. This sounds similar to your situation.

Open your most simple avs in VDub. Find a spot of movement and step through frame by frame. Do you see 3 'clear' frames and then 2 'combed' frames? You will know for sure. If so, try using decomb by adding this to the bottom of your script. The docs have much more info and are worth a read just from an educational standpoint.

Telecide(order=1,guide=1)
Decimate()

If the resulting output plays to your likeing in WMP or VDub, run pulldown on the output before muxing.

pulldown.exe yourvid.m2v outvid.m2v -prog_frames p

Now you will have a progressive stream flagged as 29.97

[scharfis_brain]

DDog, mp3dom is using PAL.
thus no decimate is needed (in MOST cases).

Further no NTSC-complications needed here :)

[mp3dom]

Thanks for the replies!
So... about CCE settings... Can I encode the film with progressive parameters?
Thanks again.

[DDogg]

:o Only on first cup of coffee :)

[scharfis_brain]

simple equation:

if (combing visible == true) then encode interlaced else encode progressive

easy isn't it?

[mp3dom]

Originally posted by scharfis_brain
if (combing visible == true) then encode interlaced else encode progressive

easy isn't it?

Yes, it's easy but i've asked it because i have never seen a progressive 4/3.
Anyway, thanks again! :)

[U977]

mp3dom,

Be carefull with software DVD players: using them, you usually won't notice if you've choosen the correct TFF/BFF parameter. Better burn the movie on a rewritable, and test it on a standalone player first.
But that is for interlaced encoding only, or course :-) If you encode as progressive (as you should do according to what you say about source your video), then there is no problem with the field order.

However, is your original DVD video flagged as interlaced? It often happens with PAL DVDs that a progressive source was encoded as interlaced, and so you can't see any combing effect.
In that case, don't forget to use ConvertToYUY2(Interlaced=true) in your AVS script to get the proper colors.

You may already know all this, but it doesn't hurt if I repeat that :-)

Strange thing of the week: I found a DVD that holds video flagged as interlaced (however, no combing effect is visible), but scanning order is set to ZIGZAG.
An alanysis of the whole video revealed that 100% of it is like that. It's the first time I see that.

[mp3dom]

Originally posted by U977
mp3dom,

Be carefull with software DVD players: using them, you usually won't notice if you've choosen the correct TFF/BFF parameter.

I've seen that WinDVD 5 has the "Progressive" deinterlacing and with this setting I can see when the field is incorrect. Anyway I've tested the video on standalone DVD player and no jerky video so I think that is really progressive! ^_^ Thanks!


However, is your original DVD video flagged as interlaced? It often happens with PAL DVDs that a progressive source was encoded as interlaced, and so you can't see any combing effect.

Yes it is! It's flagged as Interlaced but the Scanning Order is ZigZag rather than Alternate.


In that case, don't forget to use ConvertToYUY2(Interlaced=true) in your AVS script to get the proper colors.

Interlaced=true even if the video is progressive (and flagged as interlaced)? I've setted up the AVS in interlaced=false... it's a big "problem"? I've setted up the Intra DC to 10 and the luma level to "0 to 255".


Strange thing of the week: I found a DVD that holds video flagged as interlaced (however, no combing effect is visible), but scanning order is set to ZIGZAG.
An alanysis of the whole video revealed that 100% of it is like that. It's the first time I see that.

Same as my video... here my question ^_^.
Thanks for your suggestions!

[RB]

Originally posted by U977
Strange thing of the week: I found a DVD that holds video flagged as interlaced (however, no combing effect is visible), but scanning order is set to ZIGZAG.
I've seen that numerous times, nothing unusual. There's nothing that says interlaced coding must use alternate scan. Scan order should be choosen depending on the original source, so if it looks progressive, use ZigZag, alternate otherwise.

[mp3dom]

Originally posted by RB
I've seen that numerous times, nothing unusual. There's nothing that says interlaced coding must use alternate scan. Scan order should be choosen depending on the original source, so if it looks progressive, use ZigZag, alternate otherwise.

And in the case of misc materials? I mean.. always a PAL film, but with some interlacced scenes and some progressive scenes. In that case is better to use Progressive or Interlaced?
I made this question because I've an animation DVD which contain 3-4 episodes.
I've the opening/ending that are interlaced, but the episode is full progressive... so I cannot decide which settings to use. The "splitting" (encode opening/ending as interlaced and episode as progressive) is a "impossible" thing.

[RB]

For mixed content, of course use the "most compatible" setting, that is, interlaced coding and alternate scan.

[mp3dom]

Ok! Thank you very much!! :)