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All Forums > Tech Talk > Tech Talk Forum Page 53 > Running time difference of PAL & NTSC DVDs?
AuthorPost
gambrinus
Member

United Kingdom
8 Posts
12/04
Posted - Dec 19 2004 : 6:17AM
Hi,

When a porn video that was originally on NTSC DVD is converted to PAL DVD for the UK/European market, should there be a difference in running time between the two?

I know that when feature films are converted to PAL that they are about 5% shorter, but I mean porn films that are originally shot on NTSC video, and (professionally?) converted to PAL.

Thanks in advance for any info.

Jacco All-Star Supporter
All-Star Member

"liable to deprave and corrupt"
2673 Posts
5/04
Posted - Dec 19 2004 : 3:37PM
IIRC there is always a few percent difference between PAL and NTSC.

Jacco

gambrinus
Member

United Kingdom
8 Posts
12/04
Posted - Dec 19 2004 : 3:48PM
Thanks for the reply.

How many percent, would you say? And would the PAL be longer or shorter than the NTSC one?

And why would that be?

Jacco All-Star Supporter
All-Star Member

"liable to deprave and corrupt"
2673 Posts
5/04
Posted - Dec 19 2004 : 5:38PM
PAL is 25 frames per second, NTSC is 29,97 fps and regular film is 24 fps. The differences in running time come from speeding up (or slowing down) the tape a little bit to go to the other rate. It also depends on which format the master is in. I am sure one of our resident editors will know the exact details.

Jacco

TonyC
Comstock Films

2523 Posts
8/03
Posted - Dec 19 2004 : 6:00PM
When films shot at 24fps are transerfed to PAL, it's down one frame to one frame, and the sound track is sped up by 5%. The resulting PAL version is slightly short, and the audio pitch is slightly higher (Maybe they have a way to do this without changing the pitch now)

When video shot at 29.97fps (commonly refered to as 30fps) is converted to PAL it is done with frame interpolation. 16% of the NTSC frames are dropped to fit into the 25fps PAL frame rate. The imperfect time base relationship (25 vs 29.97) means that there will a ultimate difference of about .02% between the NTSC and PAL. There's also spatial interpolation because PAL and NTSC have different pixel arrays.

I'm not an engineer, so I may have some of the specifics wrong. But the idea is more or less correct.

-T.C.

 
gambrinus
Member

United Kingdom
8 Posts
12/04
Posted - Dec 19 2004 : 6:07PM
So if a US Falcon NTSC DVD with a running time of 90 minutes is released in the UK on PAL DVD with a running time of 83 minutes, then something has been cut?
TonyC
Comstock Films

2523 Posts
8/03
Posted - Dec 19 2004 : 6:25PM
There is nothing in the conversion from NTSC to PAL that would explain a 7 minute difference in running time.

-T.C.

Ghost Pro
Member

Creampies, Blowjobs and Asians..... Oh My!
236 Posts
9/04
Posted - Dec 20 2004 : 12:44AM
gambrinus- There is a chance the difference you are referring to in the Falcon DVDs is the difference in time between the uncut and retail versions of a specific title. Falcon produces two versions of some of their DVDs. These would be the ones that have fisting or waterspots.

If a title contains either of these, it will be excluded from the retail version. The mail order (or european versions) are only available directly from Falconstudios.com or tlavideo.com inside the us.

So that maybe what accounts for the time difference on the disc.

ghostpro.com

gambrinus
Member

United Kingdom
8 Posts
12/04
Posted - Dec 20 2004 : 5:50AM
Thanks ghostpro. Maybe Falcon wasn't the best example, as they release director's cuts. But I was referring their normal releases.

I guess my point is... although the BBFC (who rate R18s) website says that no cuts were made to Falcon's 'The Recruits', it says that the running time is 83 minutes. But the US version is 90 minutes, and 90 minutes is about average for a Falcon movie.

Maybe the version submitted for rating was already watered down by the UK distributor...?

cv
Member

My reviews[/url]
594 Posts
7/03
Posted - Dec 20 2004 : 10:04AM
This topic (editing for international releases) has been discussed before.

Basically, the DVD producer edits out content that will most likely be objectionable to the target market. The DVD submitted to the UK censors was already edited; the UK censors are saying that no cuts were made from the version submitted for review.

It's easier for everyone to get it passed the first time around. No re-editing by the producer, no remission/review to the censors, no costly delays for the distributor.

Ghost Pro
Member

Creampies, Blowjobs and Asians..... Oh My!
236 Posts
9/04
Posted - Dec 20 2004 : 3:03PM
Falcon ALWAYS states on their box art that the running time for the movie is 90 minutes, when most of the time it is shorter. Falcon likes to include trailers in this "feature running time" stat.

The most accurate information I have seen on actual run times is on TLA Video's website. They show the running time for "Recruits" at 85 minutes.

ghostpro.com

gambrinus
Member

United Kingdom
8 Posts
12/04
Posted - Dec 20 2004 : 5:02PM
Thanks ghostpro. It was actually The Recruits that I was thinking of. I'd misread the time on the BBFC site as 83 minutes, rather than 85, so the running times are equal. I also had a look at the running times for Taking Flight on the TLA and BBFC sites, and those are equal too.

It's normally only fisting and watersports that the BBFC have a problem with, so I was surprised that an apparent 7 minutes was missing.

And to cv: I'm a newbie here, so will do a search for topics about editing for international releases..

Percy Walker
Member

108 Posts
9/03
Posted - Dec 21 2004 : 2:22AM
I thought most European players would take both PAL & NTSC? No?
Jacco All-Star Supporter
All-Star Member

"liable to deprave and corrupt"
2673 Posts
5/04
Posted - Dec 21 2004 : 7:45PM
Yep, never seen one here that couldn't play both without a problem. I wouldn't even know which of my DVD's are PAL or NTSC if it is not on the box.

Jacco

Bill All-Star Supporter
All-Star Member

5334 Posts
6/00
Posted - Dec 21 2004 : 8:36PM
But that's really the TV's that will handle both PAL and NTSC right? The vase majority of DVD players will just pass PAL or NTSC through to the TV with no modification. It's up to the TV to be able to display it correctly. DVD players that will convert PAL to NTSC and vice versa, while they do exist, are far more rare.

Our problem in the US is that, except for some projectors and HDTV's, finding a TV that will display a 50Mhz PAL signal is rare.

 
Jacco All-Star Supporter
All-Star Member

"liable to deprave and corrupt"
2673 Posts
5/04
Posted - Dec 21 2004 : 9:50PM
I just checked the manuals for my DVD-player, TV and VCR and only the VCR does mention PAL/NTSC at all, saying it will play NTSC tapes on a PAL TV. The DVD player is some cheap brand X and the TV and VCR are from JVC.

Jacco

gambrinus
Member

United Kingdom
8 Posts
12/04
Posted - Dec 22 2004 : 12:49AM
Yes, my TV handles NTSC DVDs perfectly well. In fact, since seeing some really awful NTSC to PAL conversions of R18s distributed by Zipper in the UK, I've stuck to buying the NTSC versions when I can.
All Forums > Tech Talk > Tech Talk Forum Page 53Running time difference of PAL & NTSC DVDs?

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