[Frameworks] optical soundtrack generator?

[Seth Mitter]

AEO-Light is a tool that does the exact reverse and therefore may be of
interest here. It takes images of optical soundtracks from a film scanner
output (overscan tiff or dpx image sequences) and converts them into
digital audio files.
https://usc-imi.github.io/aeo-light/#about

On Tue, Sep 8, 2020 at 11:30 AM Jason Halprin <jihalprin at gmail.com> wrote:

> Hi Scott (et al),
>
> Not for 35mm, necessarily, but there is a very active 16mm Auricon group
> on facebook that might have some tips or starting points. Not necessarily
> for Scott, as I'm guessing you already know, but these were TV news cameras
> that recorded optical sound directly on the film - no need for syncing
> later on. These have been converted by DIY labs to become sound printers,
> as well.
>
> For 35mm you may be able to find an old Westrex 35mm printer (mono)...and
> perhaps just using it as a recording device for the sound output from a
> computer would be more accurate than trying to print the sound line-by-line?
>
> Regardless, please share with us when you have a solution!
>
> -Jason Halprin
> Montréal
> Jason Halprin
> jihalprin at gmail.com
> jasonhalprin.com <jihalprin at gmail.com>
>
>
> On Tue, Sep 8, 2020 at 10:17 AM Scott Dorsey <kludge at panix.com> wrote:
>
>> Ahh, I get it, you want a digital image of what the soundtrack would like
>> and
>> you want to plot it out as part of your filmout.
>>
>> This turns out not to be an easy thing to do because of the frame lines...
>> it is very very hard to get the bottom of one frame to line up perfectly
>> with
>> the top of the next one so there is not some discontinuity 24 times a
>> second.
>> The Arrilaser recorder can do it, but they take a file that consists of
>> frames and turn it into a datastream that consists of individual lines,
>> and
>> plot a line at a time instead of a frame at a time.
>>
>> But if you want to try it just to see what happens, it should not be all
>> that hard to write a little script to create two white lines whose width
>> varies with modulation.  Pull values one at a time out of a .wav file,
>> use them to set the width of the line directly.
>> --scott
>>
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