Great, thank you.  This is exactly the sort of thing I would like to do
automatically --

- Take an .mp4 video file and a .wav file, composite them into tracks
- Grab first five seconds of audio and use it as a profile for noise
reduction across the entire audio
- Identify initial clap on both audio and video tracks, sync them together
- Delete sound from video track
- Merge video and audio
- Locate/delete inhale fuzz
- Cut everything from beginning to 1s before the first spoken word
- Locate and delete bad takes (a single clap sandwiched between "good
to/from here" spikes (double click))

That would eliminate about 90% of the work and I could do the rest manually.

On Sun, Dec 2, 2018 at 3:33 PM Matthias Felleisen <>

> On Dec 2, 2018, at 2:49 PM, David Storrs <> wrote:
> Hi all,
> I have some video (.mp4) and audio (.wav, although it's from Audacity and
> could be exported in other formats) that I would like to sync up.  At
> RacketCon I recall seeing Leif running a talk about the Racket Video
> language.  I'm looking through the docs now and it's unclear to me what the
> real capabilities are.  Leif, or anyone who has worked with it:  Is the
> language capable of realistic editing?  What sorts of things have you done
> with it in the past
> See for the motivating
> example, namely, scripting the post-production of many videos. — Matthias

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