compensating 4% PAL speedUp on playback of a dvd (Mac user)

[zep]

hi, I've searched this forum and the rest of the internet but I still could not find an answer to my problem.
I really want to have my PAL dvd, playing at the correct speed of 24fps.
I figured this wouldn't be so hard, because i'm using my laptop for playback, but it turns out i was wrong (?).

I'm really bugged by the speedUp, especially the audio pitch.
I don't want to convert anything, I just want the playback to be correct.
Can anyone help?
Thanks.

I'm really sorry if there was a FAQ where this was already answered but I swear I couldn't find anything.

[Baldrick]

Buy the movie in NTSC format. Because I have not see any player that can do a realtime audio and video conversion from 24fps to 25fps...

[zep]

and the pitch? that's helpable right?
I've read some stuff about AviSynth but it sounds a little complicated to me.
And I can't run Zoom player (which supposedly has a filter that does the job) because it doesn't run on Mac.

[manono]

ReClock:

...it is an audio renderer with hardware or software rate adaptation in real-time, multi-channel audio, audio timestretching (pal speedup compensation) and dynamic range compression capabilities.

http://reclock.free.fr/

Seems to be only for Windows machines, though, and another instance of a Mac being useless for something important.

[therock003]

Guys seriously what is it with video files and framerates? I've been watching video media on my PC for some years now and i never notice any difference whether it's 23.97,24,25,29.97 or 30! How can you really tell?

[jagabo]

24 fps film is usually sped up to 25 fps for PAL broadcast/release. The audio is sped up too resulting in about a half tone increase in pitch. Here's a small sample at normal speed and sped up by 4 percent:

test.mp3

The change is easily noticed when you hear the two samples side by side. If you know a piece of music well you can tell the difference in speed and pitch even when heard alone.

23.976 and 29.97 have the same running time because fields are duplicated rather than flipping through the frames faster. So there is no change in the audio duration or pitch.

[zep]

the thing is, once you've noticed it, you keep on noticing it.
especially with music but for example also with actors who have a particular deep voice.

So, no solutions for a Mac user? Thanks for the replies everyone.

[jagabo]

Most Windows sound cards come with software that can do a pitch shift during playback of any audio source (ie the DSP runs right before sound goes to the D/A converter). That would fix the pitch. The tempo will still be fast. There should be something similar on the Mac.

[therock003]

24 fps film is usually sped up to 25 fps for PAL broadcast/release. The audio is sped up too resulting in about a half tone increase in pitch. Here's a small sample at normal speed and sped up by 4 percent:

test.mp3

The change is easily noticed when you hear the two samples side by side. If you know a piece of music well you can tell the difference in speed and pitch even when heard alone.

23.976 and 29.97 have the same running time because fields are duplicated rather than flipping through the frames faster. So there is no change in the audio duration or pitch.

Now that you mention, you do distinguish the change when you put them side to side, i wont try to master it though so i wont become self consious when that happens when i'm watching media.

So Generally all film material is originally captured on 24p? Or is that for PAL only? For NTSC it is captured in 24 as well and then matched to 23.976 or is it captured on 23.976 and then proceed with the duplication resulting to 29.97/30 for DVD releases?

[manono]

All film is progressive 24fps. For NTSC DVD it's slowed to 23.976fps via the drop_frame flag and (usually) soft telecined (3:2 pulldown applied) so that it outputs interlaced 29.97fps. For PAL, when done the usual way, it's speeded up to 25fps and encoded as such. The speed is about 4% faster than normal and the audio a semi-tone higher.

[jagabo]

Modern film is 24 fps. Early silent films were slower. IMAX is 48 fps. When 24 fps film is transfered to NTSC DVD it is slowed to 23.976 fps. When telecined for TV it becomes 59.94 fields per second.

[zep]

Hey everyone, I just read on the VLC player forums that they are going to include EXACTLY the solution for this problem in their next version of VLC.
How cool is that, just when I needed it.