[RESOLVED] 2:3 pulldown – or not?

[Guest 2]

There are no universal settings. You know that! Yes, you have to check every DVD.

Picture something about more than one thousand DVD to convert here...

Scan type interlaced does not mean it is interlaced. Go figure. Nyuk nyuk.

Can you please clarify this aspect? It's something bit obscure to me.

[Guest 2]

Just found a nice trick with ffmpeg to determine what a video is, please tell me if it's a good method:

http://www.aktau.be/2013/09/22/detectin ... th-ffmpeg/

On progressive DVD material it gives me:

Code: Select all

[Parsed_idet_0 @ 00000222ad0e8f00] Repeated Fields: Neither:  8002 Top:     0 Bottom:     0
[Parsed_idet_0 @ 00000222ad0e8f00] Single frame detection: TFF:     0 BFF:     0 Progressive:  4273 Undetermined:  3729
[Parsed_idet_0 @ 00000222ad0e8f00] Multi frame detection: TFF:     0 BFF:     0 Progressive:  7987 Undetermined:    15

On really interlaced one:

Code: Select all

[Parsed_idet_0 @ 0000019c48c0a140] Repeated Fields: Neither:  8588 Top:   691 Bottom:   722
[Parsed_idet_0 @ 0000019c48c0a140] Single frame detection: TFF:     3 BFF:  9132 Progressive:    46 Undetermined:   820
[Parsed_idet_0 @ 0000019c48c0a140] Multi frame detection: TFF:     0 BFF: 10001 Progressive:     0 Undetermined:     0

[Rocky]

Ehm... how can I learn if it's pure 24 flagged as 30 when indexing?

Open the VOB in DGIndexNV. Navigate where you want to inspect. Hit F6 and watch the Film % field in the Info dialog. If it is 100% then it is pure soft 3:2 pulldown there. Or as guru MeteorRain already said: do a full indexing and look at the film %, either in the Info dialog or in the DGI file (at the bottom).

[Rocky]

Picture something about more than one thousand DVD to convert here...

A journey of a thousand miles begins with a single step.

Can you please clarify this aspect? It's something bit obscure to me.

The content can be progressive but encoded as if it is interlaced. Very simple.

[Rocky]

I'm sure ffmpeg is just dandy. It's better to understand what you are doing, as Mr Peabody made clear.

[Guest 2]

as Mr Peabody made clear.

Err... apart from cartoons... who is Mr Peabody here?

[MeteorRain]

Can you please clarify this aspect? It's something bit obscure to me.

In order to fit anything into a DVD, you have to fake a few things. For example, since video resolution can only be 720x480 for NTSC contents, you have to either resize 848x480 to 720x480 and set DAR back to 16:9, or add black borders. Same for 640x480 contents, you have to stretch it to 720x480 and set DAR back to 4:3. For frame rate if you have 23.976 you have to 2:3 pulldown it to make it 29.970, or set the pulldown flag to fake interlace, because DVD only accepts that.

So long story short, it's a fake flag, a compromise. The author can either actually pulldown the video, causing potential loss of quality, or leave it progressive as-is and put a fake flag on it. It looks like a 720x480@30, it may actually be 848x480@24.

[Rocky]

who is Mr Peabody here?

Isn't life itself a cartoon?

I'm not sure about Mr Peabody. A bit pompous but very bright. Knows a lot. He's sort of like one's conscience, ya know? Always on your side but often bringing some unpleasant messages. When they come back from the past, usually, Sherman epiphanizes to the max. So, it's all good. Am I wrong?

viewtopic.php?f=14&t=671&p=10576#p10576

[Sherman]

The timeless Levi Stubbs covers a classic:

https://www.youtube.com/watch?v=mxhIK7rUeqI

[Natasha]

Jimi Hendrix made a song about me!

https://youtu.be/-E2A60WslXg?t=14

[Guest 2]

do a full indexing and look at the film %, either in the Info dialog or in the DGI file (at the bottom).

Cool! I never looked at the end of DGI file!

Would you please add the percentage of TBF, BBF and progressive frames too? It would be really useful!

[Guest 2]

Isn't life itself a cartoon?

“Once you realize what a joke everything is, being the Comedian is the only thing that makes sense.” ― Alan Moore, Watchmen

It's so delightful to frequent this forum: wise people, fun facts and some science too.

I love you guys.

[Rocky]

Thank you, Guest 2, we aim to please. I'll mark this resolved but continue as needed.

[Levi]

This beautiful cover of a Jimi Hendrix classic brings peace to my soul.

https://www.youtube.com/watch?v=Nzo3kfByUIM

and here:

https://youtu.be/R11a7J1BsMQ?t=9

[Boris]

You think that's good? Look what I found lying around. If admin notices this the link will go bye-bye in a nanosecond.

[link removed]

Sweetie Pie really digs this.

[admin]

You are a bad boy, Boris. Don't do that again.

[Bullwinkle]

Here's what Microsoft's Groove Music has to say while playing Jim Hendrix's Pali Gap:

"Nothing to show here. Try another filter."

Really?