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Discussion Starter · #1 ·
Ok, so now I'm confused. I was watching "Taking Lives" last night, pal version obviously. In the beginning(and ending), "Bad" by U2 is played. A very good song, and a song I've heard several times. Therefore I noticed that Bono was singing to high. Hmm, I thought, something's amiss... thinking something was wrong with my setup. Then I remembered reading somewhere about pal speedup. So I set reclock to 24fps and problem was solved. But now I have several questions..


As I understand the film is stored on the dvd with 24fps both for ntsc and pal. Pal uses speedup to fit it into 50fps, ntsc uses 3:2 pulldown. My refreshrate is 60Hz due to my lcd projector, wich equals ntsc. Why am I still experiencing speedup. Shouldn't my computer use 3:2 pulldown to fit the movie to 60fps?


When I set 24fps in Reclock, I assume it's lowering the pitch of the sound and not slowing down the movie itself. If so, does this have any adverse affect on sound quality?


Last question: I've read that some pal disc's come pitch corrected. Wich ones are these? Is there any database showing witch ones?


Thanks
 

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Not only 24/25 Hz differ, pal is encoded @ 720x576 and ntsc @ 720x480. I think that the dvd's are flaged to be pal or ntsc and even if You are in ntsc land You player seeing it as a pal disk and pal should be played @25 hz.

Can't see that any adverse affect on audio (more than lower pitch) should appear if slowed down to 24 hz.
 

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Quote:
As I understand the film is stored on the dvd with 24fps both for ntsc and pal. Pal uses speedup to fit it into 50fps, ntsc uses 3:2 pulldown.
Actually, virtually all films encoded to PAL DVDs run at 25 FPS. A 2-2 pulldown process is used here in PAL land. So the speedup you’ve noticed is pretty common on PAL discs, it’s what happens when the audio isn’t pitch-corrected before encoding.


Cheers.
 

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Discussion Starter · #4 ·
Thanks for the replies :)


Ok, so what pulldown is used to fit 25fps into 60 fps? Do I get the worst from both worlds when running pal discs at 60hz? Both speedup and motion stutter?

Are most discs not pitch corrected, and if so my best guess would be to set reclock to 24fps for all pal films?
 

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Yes, when you run PAL films at 60Hz you are indeed getting the worst of both worlds. You could get around the stutter by syncing your display to 50Hz instead, if possible... That’s what I do with my LCD projector (Panasonic AE500) when watching PAL stuff.


As for which discs are pitch-corrected, there’s no sure way to tell other than how you did it: by listening to a well-known song. I don’t know of any databases out there that keep track of it.


I order most of my DVDs from North America to avoid all these issues, not to mention the overall poor quality of DVDs sold in this country. ;) Out of the few PAL discs I own, I must admit that I rarely notice the wrong pitch. But it’s hard to say whether that’s because most of them are pitch-corrected, or whether I simply didn’t notice the change in pitch.


Cheers.
 

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huh ? PAL dvds have 24fps in them ? i dont think so, its 25fps from the start, thats why the audio is always 4% fast


try ripping the ac3 tracks and its still @ 25fps speed.


about pitch speed up, just listen to trailers in PAL dvds, most of these are not pitch corrected. Main movies however are most of the time pitch corrected or else it really sounds BAD !!!! , like a robot sounding chipmunk
 

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Discussion Starter · #7 ·
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Originally posted by trailergod
huh ? PAL dvds have 24fps in them ? i dont think so, its 25fps from the start, thats why the audio is always 4% fast


try ripping the ac3 tracks and its still @ 25fps speed.


about pitch speed up, just listen to trailers in PAL dvds, most of these are not pitch corrected. Main movies however are most of the time pitch corrected or else it really sounds BAD !!!! , like a robot sounding chipmunk
What I should've said was that for pal and ntsc, the same number of frames is stored. Pal displays these at 25fps.


Abstrakt, you say you sync your projektor at 50hz. Isn't all lcd panels fixed at 60hz, so while your projektor accepts 50hz you still have the 60hz problem?
 

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Abstrakt, you say you sync your projektor at 50hz. Isn't all lcd panels fixed at 60hz, so while your projektor accepts 50hz you still have the 60hz problem?
No, the Panasonic AE500 truly syncs at 50Hz yielding perfectly smooth pans on PAL material. See my post in this thread for more details. While researching my LCD projector purchase, I had also come across reports of the Sanyo Z2 syncing fine at 50Hz, although apparently that is not as easy to achieve.


If you need more information this stuff gets discussed to death in most European A/V forums, since it’s the biggest pet peeve of LCD projector owners over here. ;)


Cheers.
 
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