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Dr. M's Reinventing The Wheel Edition (PAL to NTSC+) (Released) — Page 2

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Pupil, no I think we were on the same page the whole time just explaining it differently.

I was referring to the fact that I have worked on other projects taking PAL back to NTSC. They obviously were not pitchshifted like Star Wars.

But you were saying:
So you just need to slow it down (resample it) by 4.096% and its back to the normal speed and pitch again.


In the past (and my future plans) involved using BeSweet's simple 24 fps -> 23,976 FRC preset. Do you know of a program that actually can resample as you've described or are you referring to the kind of process BeSweet already uses?

Dr. M

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I just remembered, back in the day when I used to do a bit of work as a DJ (this would be mid to late '90s) there was a piece of hardware available that did some kind of realtime time stretching/pitch preservation for you. Basically it meant that DJs could drastically ramp up the tempo of a track without getting the "helium" effect on the vocals, and it also compensated for any sudden pitch change if you touched the record during a mix.

Digging around Google came up with this, but not much else.

So what I'm saying is that the technology for pitch preservation did exist back when these VHS versions were released, so it shouldn't be so much of a surprise that it was used. Just makes you wonder how many other PAL titles have the correct pitch?

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Interesting subject this pitch shifting/time stetching stuff. But since Morh3r's video and Arnie.d's audio are both LD sourced, they shouldn't have the minute speed variations VHS has: which caused the out-of-sync problems Moth3r had, caused him a lot of work deleting those 40 ms segments, and still isn't perfect. So I think if you match Moth3r's video with Arnie.d's audio at the beginning and the end of each disc-flip it should match perfectly. I wouldn't wait until Citizen is done, by then it won't be necessary anymore to make a PAL>NTSC conversion, cause he's doing one himself. And I'm with you on the saturation, just because they used to be undersaturated doesn't mean you have to keep it that way. Movies are supposed to be colorful.

That's no moon. It's a LaserDisc.

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Originally posted by: Doctor M
In the past (and my future plans) involved using BeSweet's simple 24 fps -> 23,976 FRC preset. Do you know of a program that actually can resample as you've described or are you referring to the kind of process BeSweet already uses?

Basically you can still do all this with Sound Forge (since you are using this already).

1) In the NORMAL case of turning PAL to NTSC, where the pitch is 4.096% higher than the original film, you use the pitch correction plugin in SoundForge, decrease the pitch by 72.4 cents, but DON'T tick the preserve duration box.

2) In this ABNORMAL case of turning PAL to NTSC, where the VHS audio of ANH was pitch corrected in the original mastering process, you use the pitch correction plugin in SoundForge, decrease the pitch by 72.4 cents, and DO tick the preserve duration box.

All BeSweet is doing is example 1. I would say 99% of the time, you would just need to do example 1 (or use the BeSweet method) but with this bizarre example of the PAL ANH VHS audio, you would use example 2.

If doing example 2 in Sound Forge, you will see the pull down menu with different settings for keeping the time duration when pitch correcting the audio, mess around and see which sounds best (but like I say, for this project Doctor M, don't bother, you're best getting the soundtrack off an NTSC laserdisc and fitting this to Moth3rs video after you have NTSC'd it).

I think we are on the same wavelength now, I was starting to get a bit confused there with what you were asking

Originally posted by: Moth3r
I just remembered, back in the day when I used to do a bit of work as a DJ (this would be mid to late '90s) there was a piece of hardware available that did some kind of realtime time stretching/pitch preservation for you. Basically it meant that DJs could drastically ramp up the tempo of a track without getting the "helium" effect on the vocals, and it also compensated for any sudden pitch change if you touched the record during a mix.

Digging around Google came up with this, but not much else.

So what I'm saying is that the technology for pitch preservation did exist back when these VHS versions were released, so it shouldn't be so much of a surprise that it was used. Just makes you wonder how many other PAL titles have the correct pitch?


Yup thats right, the technology has been around for quite a while to do this, its just bizarre they used it since AFAIK it is standard practice to just speed the audio up with the video and leave the slight pitch increase. Those funky mastering engineers back then were obviously trying to be clever

Like most audio DSP FX technology, the ability to do these things with hardware has been around for quite a while, but we're still trying to catch up doing it purely software wise. Take for example reverb units, we still can't perfectly synthesise using only software the crackin reverbs you get out of 10 year old Lexicon reverb units.

Also, is anyone here an old skool early 90's Junglist? No... just me then Classic track by Dead Dred called Dred Bass, it has a time stretched ragga vocal sample in it, beauty track from 1994. Same technology we use for Time Stretching now, but do-able using hardware samplers well over 10 years ago.

www.bardothodol.net

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Pupil: what is your source for the 72.4 cents number? Calculated or from elsewhere?

Btw, my father back in the 80's(?) had a high end audio cassette player that could let you adjust playback speed and set pitch so you could listen to lectures at faster rates while preserving pitch.

Yeah the technology is old by remember all the sources were analog. But for those you pretty much have an "infinite" sample you're reading and changing as you drag it across some sort of tape head (or record needle). (Ok not infinite but you know what I mean).

But digital recordings only have so many samples per second when if you expand a give sample it now has to go further. This would definitely lower quality.

Dr. M

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Originally posted by: Doctor M
Pupil: what is your source for the 72.4 cents number? Calculated or from elsewhere?


discussed on page 2, second post of this thread. It tells you in sound forge the corresponding figure in cents when decreasing the pitch of the sound, also after that post Gillean worked out the maths so showing it is plus or minus 72.4 cents difference between PAL and NTSC audio.

Thats interesting about you fathers cassette player, I didnt think that was possible using analog tape decks. A playing on Google I shall go.

EDIT: ahhh, ok it would have been done with an analog ring modulator, that must have been one very fancy cassette player your dad had! Not the way time stretching works now as that can only be done digitally, that method as more akin to how a vocoder works, I bet playing music through that cassette deck and changing the pitch would sound funny, very Rick Wakeman

www.bardothodol.net

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Anyone who was waiting for an update thursday, I must apologize. My other project was a vhs to dvd coversion of a badly degraded wedding video.
The project was almost done when I made the amazing discovery that in the worst parts, the odd fields were 80% intact and only the even fields were damaged. So a completely unwatchable noise ridden wedding video with some slight filtering has become an amazing resurrection from the trash heap.

With that out of the way I can now start tonight/tomorrow looking at Moth3r's movie.

Now correct me if I'm wrong, but Moth3r did say he added and removed frames to help sink the audio? Ay, that's gonna hurt.

Dr. M

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Hmm, ok first swing and things are looking much better than anticipated.

I take back some of what I said about the color levels. Especially the reds. Scanning a larger chunk of the movie (about 40 minutes) I see that the reds are plenty saturated. Also, the blues are full as well (I so much wanted more blue for R2 but that would be bad). Using the Color corrections tip from the X0 Project's web site I maxed out the saturation. Set like that I found at the beginning I couldn't boost most colors without the walls turning non-white (as was observed earlier in my posted clip with the pink-tint). Now I will confirm this later (and post screenies for your approval), but it looks like boosting only green and yellow (and not red, blue, magenta, and cyan) 25% allows us to improve the overall appearence without taking any colors past the 75% target and without adding ANY tinting to the white walls, troopers, or Leia's clothing (maxed out saturation confirms this).

As far as the audio, I took my PCM audio clip and added about 1/3 of a second less than 17 seconds of silence (during the THX logo). The audio appears to sync perfectly for about 30 minutes from the beginning.

Now I can add/remove blank audio from the PCM clip further to see if I can keep going like this but 2 things stand in my way.
First I have to free up a bunch of drive space but given time That's easy enough.

What would be monsterously helpful at this point would be if anybody could quote me as closely as possible the side changes for both the DC edition and the French PAL (? Moth3r's source). I'm thinking that's going to be the key blocks where the audio will need to be resynced each time.

If that's the worst of it, this project should work out great.

Dr. M

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End of side 1 is Owen leaving the house when he's searching for Luke. Begin side 2 is Luke and C3PO speeding through the dessert. I'm not at home so I can't check my avis for the other disc/side changes. I also tried replacing Moth3r's audio (I tried adding PCM audio to the PAL m2v) and in the first half of the movie it went well, but after that it gets worse. In the death star battle the audio seemed to be a bit behind then a bit ahead and so on. So in the end I gave up.
Fez: I am so excited about Star Whores.
Hyde: Fezzy, man, it's Star Wars.
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Originally posted by: Doctor M
What would be monsterously helpful at this point would be if anybody could quote me as closely as possible the side changes for both the DC edition and the French PAL (? Moth3r's source).


Have you checked out this thread lately ?

However, in practice you must take into account the “fuckwit factor”. Just talk to Darth Mallwalker…
-Moth3r

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Have you checked out this thread lately ?

I have now.

Dr. M

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Welllll,
In an ideal situation I would need only to correct the A/V sync at the side changes of both the source materials (about 8 points).
That is of course not the case. Spending several hours working on this today, I have decided that it is beyond my current abilities (or the time I am willing to invest) in order to add a new audio track. The first 1/2 hr falls into place nicely, and then you start seeing sync shifts between scenes where there is no side change from either source.

So I am packing it in with that idea. Sorry guys I wanted it too. If anyone else wants to take this up, you can contact me and I'll help out as best I can.

What I can show you (and what will probably be my final material) is this:
Audio track: Ripped from Moth3r's disc, converted to wav, PAL -> NTSC (all BeSweet at this point), and pitch-shifted (Music2 profile in Sound Forge). I'm going to keep this as PCM audio since the black borders allow a Q of 35 with 1900kbps (no kidding).

Audio clip is here (Right-Click, save target as...)

I DID originally boost all colors 35%, then it was 25%, then it was only yellow and green, now it's 15% (some late movie laserblasts clip above this level). Scanning the whole disc this seemed the best way to go. I just didn't like the pale colored C3PO in the source.

Anyway some snaps for you all. You can see that the black borders on the sides seem beefy, but they are all but completely lost in overscan on a TV.

http://home.earthlink.net/~originaldrm/snap1.jpg
http://home.earthlink.net/~originaldrm/snap2.jpg
http://home.earthlink.net/~originaldrm/snap3.jpg

(Pictures are direct output from VirtualDub, pre-re-encoding.)

The test burn clip from all this was fairly pleasing on a 4:3 35" TV with a THX 5.1 select audio system.
Yes I know it's not perfect and I'll take input on this since I'll probably be running this through the mpg encoder in a few days.

It's not all I hoped for, but in my mind better than most NTSC transfers to date.

Dr. M

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Docter M, I hear your anger over the audio sync crap. I am no expert by far but I have had the same sh!t happen to me.
Not to get ahead of you but are you planning to release this on torrent or a.b.starwars or something, if you need help with getting it on a.b.starwars just pm me.
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Well, I was hoping to get some final thumbs up/down from the crowd over the color change and/or the pitch shift setting (there are like 12 variations in Sound Forge).

Assuming all is go, I will post an updated clip of the final DVD with full tech details and if there's general agreement that it warrants release I can send a few discs out to any who want to torrent it or put it on a binaries group.

Since ES is up on MySpleen you all might want to wait since it'll take all of an additional week to get that ready for release as well (barring unforseen problems).

Then there's the whole chapter thing I hadn't considered until just now. Anyone have an NTSC time code list (or .chp file) they want to share?

Dr. M

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Snaps above are updated. After a visit to the X0 site and a bit of brightness comparison I tapped a tiny tiny bit more brightness into my filters (4%). It's just enough to keep there being any washing out of detail, but it whitens whites while you brush.
It also allowed me to tap the yellow/green correction up to 25% (from the previous 15%) with only slight clipping in 1 frame of film (a laser blast).
This brings '3PO up even better. I really should rename this project the Quest for the Golden Droid.

In case you're worried about the green increase, the only real greens in the movie are console displays on the Death Star and the readout at the bottom of Luke's binocular thingees.

Tried to adjust the hue, but where one shot needs it tipped one way, the next scene needs it somewhere else. So that is being left alone.

Any whoser, again, corrected pictures are above...

Still looking for a quick easy way through the chapter stops...

Dr. M

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Originally posted by: Doctor M

What would be monsterously helpful at this point would be if anybody could quote me as closely as possible the side changes for both the DC edition and the French PAL (? Moth3r's source). I'm thinking that's going to be the key blocks where the audio will need to be resynced each time.


There are also a couple of frames cut from the PAL releases at just about every reel change. The maximum length of a reel is about 22 minutes, which implies at least 6 places. Plus side breaks.

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This has probably already been asked, but when will this be released. I am EXTREMELY looking forward to this as out of the 7 DVD players in my home, the "main" one can only play NTSC discs. (There are 4 that can play PAL, but three are portable.)
Rock. Nirvana. Awsomeness.

http://img46.imageshack.us/img46/1446/jackson3dg.jpg

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Originally posted by: Doctor M
Anyone have an NTSC time code list (or .chp file) they want to share?
Not exactly time codes, but maybe this page might help ?

However, in practice you must take into account the “fuckwit factor”. Just talk to Darth Mallwalker…
-Moth3r

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Originally posted by: Doctor M
nty


NTY? At the risk of sounding wholly out of it, what's 'nty'?
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No.......nty.

<span class=“Italics”>MeBeJedi: Sadly, I believe the prequels are beyond repair.
<span class=“Bold”>JediRandy: They’re certainly beyond any repair you’re capable of making.</span></span>

<span class=“Italics”>MeBeJedi: You aren’t one of us.
<span class=“Bold”>Go-Mer-Tonic: I can’t say I find that very disappointing.</span></span>

<span class=“Italics”>JediRandy: I won’t suck as much as a fan edit.</span>

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No Thank You (the opposite of ty). Guess that abbreviation isn't taking the net by storm.

Dr. M

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(To be honest, I've never seen 'ty' either... )
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MAJOR UPDATE: I gave up trying to make the original audio sound good, grabbed some new software and spent 7 hours(!) last night learning as I went and doing some beautiful work putting that Definitive Collection audio track in.

I'm tired, but I am sooooo happy with it. Cuts in the audio are crossfaded in such a way as to remain unnoticed (hopefully).
I burned a test disc with provisional (1 pass CQ) video. It is stunning just like that.

Don't believe me? The first post of this thread has gotten overhauled to reflect what is what and includes a clip (at bottom) of the release candidate video.
That's a 7-pass vbr, now how do I make CCE go all the way to 11?
Let me know what you think, and be honest, this IS for posterity. To bright, to yellow, too much border, etc.
Final encoding will start in a couple days.

I'm currently d/l-ing Moth3r's ESB. Does anyone have the chapter cuts for this as well (French and DC)? That made life MUCH easier last night.

Dr. M