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Post #655146

Author
Mavimao
Parent topic
Harmy's THE EMPIRE STRIKES BACK Despecialized Edition HD - V2.0 - MKV & AVCHD (Released)
Link to post in topic
https://originaltrilogy.com/post/id/655146/action/topic#655146
Date created
18-Aug-2013, 3:16 AM

OK, so the problem with the Puggo Strikes Back audio is this:

When I set out wanting to do a sync with the GOUT, I had two goals in mind. The first was to create an A-B left ear/right ear comparison file with the standard stereo track to see if there were any other differences in the audio that people could listen to and point out. The second was, well, so people could mux it with any GOUT project they wanted!

The issue is that the PSB audio is in no way in sync with the stereo track. I had first tried to sync it up with the beginning of the opening theme song but then the piece starts to drift out of sync to the point that the probe droids launching are no longer in sync. 

While the PSB video is locked at a solid 23.976 fps, the audio was captured by running the film through a projector running at 24 fps. Puggo mentioned that he had a lot of problems syncing the sound to the picture and was constantly having to splice and re arrange the sound to get it to sync up. I don't know his exact workflow (and I wonder how rock solid the fps was on the projector - for all we know, it could have hovered 'around' 24fps), but I saw the same thing happen in film school when friends would edit their films on Steenbecks and edit their sound with 24fps sync in mind and when they would get their films transferred to video to edit a reel together, they couldn't understand why their films weren't in sync anymore. They were forced to, like Puggo, go through and splice up the sound and move it around. Well 23.976 and 24 doesn't seem like a large difference (and in terms of pitch, you really can't hear the difference), but when you're dealing with exact timing like syncing sound and picture together, it makes a HUGE difference.

The key is to decrease the speed of the 24 fps source -0.1% and then you obtain perfect sync. 

Puggo might have done this, I don't know, but I wanted the original projector captures to see if decreasing its speed down a bit would fix the sync issues I was experiencing or if it was the projector not projecting at a precise 24 fps.