ReClock 1.8.6.5

[James]

Is that also the way a movie producer adapts a 24fps movie to a PAL dvd?

I don't know what you mean by "the way" (??), but it is simple: with 99.999% of the discs, it is simply played 4.2% faster (making a 120 minutes movie about 115 minutes long) and the audio is pitched 4.2% higher.

The first "PAL Speeddown" checkbox will completely reverse this, motion is correct, movie runtime is correct, pitch is correct. Your PC with ReClock is the only DVD player able to do this. No ultra high end player will.

Every high end home theater system for thousands of bucks with monster cables and whatnot plays PAL movies with incorrect pitch. ReClock has a -4%/+4.2% speed setting so you can experience the effect.

Funny.

 

[yesgrey3]

The first "PAL Speeddown" checkbox will completely reverse this, motion is correct, movie runtime is correct, pitch is correct. Your PC with ReClock is the only DVD player able to do this. No ultra high end player will.

That's not completely true...
If we use the Microsoft Audio renderer and a soundcard which allows "slowing down" its clock frequency, we can also correct it without needing reclock, but we will have to live with Microsoft resampling instead...
Though, for the general PC users, that don't have such a soundcard, reclock is in fact the only option, and the other guys, which have such a soundcard, also end up using reclock because it's the only way of performing pitch correction without any resampling... I'm one of these.

 

[mariachi76]

I don't know what you mean by "the way" (??), but it is simple: with 99.999% of the discs, it is simply played 4.2% faster (making a 120 minutes movie about 115 minutes long) and the audio is pitched 4.2% higher.

The first "PAL Speeddown" checkbox will completely reverse this, motion is correct, movie runtime is correct, pitch is correct. Your PC with ReClock is the only DVD player able to do this. No ultra high end player will.

Every high end home theater system for thousands of bucks with monster cables and whatnot plays PAL movies with incorrect pitch. ReClock has a -4%/+4.2% speed setting so you can experience the effect.

Funny.

But with the disadvantage that pitch correction somewhat decreases sound quality and surround sound? (As discussed in this thread)
regards
mariachi76

 

[Mike5]

Pitch correction is logically equivalent to play an old 45rpm vinyl record at 33rpm. The song is longer, slower and low-pitched.

When you play a PAL movie at 24Hz, it is 4.2% longer, slower and low-pitched with respect to the DVD version and, as James has said, has got back the same length, speed and pitch of the original cinema movie.

There is a problem, though. The sample rate of DVD sound is decreased by 4.2%, from 48000Hz to 48000 * 24 / 25 = 46080Hz.

If you have a hi-end sound card, like yesgrey3, the card accepts this non-standard sample rate and you get the best quality, because no resampling is done.

If you don't, Reclock will resample for you. I think, but only James can say for sure, that first Reclock resamples 48000Hz to 48000 * 25 / 24 = 50000Hz and then it plays the movie at 24Hz, decreasing back the sample rate to 48000Hz, so that your sound card can process it.

In addition to this, because of slight variations of the display refresh rate, resample won't be always the same, but it varies following the refresh fluctuactions.

Obviously, resampling affects the sound quality, but not in the heavy way it does with timestretching.