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Author Topic: Extracting (and "fixing") Audio from a Video recording  (Read 3049 times)

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Offline detroit lightning

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Extracting (and "fixing") Audio from a Video recording
« on: October 12, 2012, 01:21:38 PM »
Was talking with a taper buddy this morning and he mentioned he was having an issue with a recent video recording that he did.  He had planned on using the SBD for the audio, but it apparently didn't come out. 

He said the audio off of the video is "distorted."  That could obviously mean a number of different things - but he's wondering how to pull the audio off the video to possibly work with it.  I suppose the *corrected* audio would then be synced back up with the video. 

Also, it's a mini-dv camera.

It's hurting my head just thinking about it.  Anyway, any thoughts/advice would be greatly appreciated! 

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Re: Extracting (and "fixing") Audio from a Video recording
« Reply #1 on: October 12, 2012, 02:29:34 PM »
1) Transfer the video and audio together (standard capture/transfer). Make sure the audio is recorded as PCM and not something compressed. Use an external ADC if you want, but the point is transfer it to where you can edit them digitally.
2) Extract the audio from the video file(s) via a video editor or a demux program.
3) Work on it to fix anything you want/can, then export.
3.5) Compare both files to ensure they are the same length and content hasn't shifted.
4) Remux the video and audio together.
5) Do any video edits.
5.5) Ensure the audio is still synced, (you need to do this before and after remuxing as you can get sync issues in both places but for different reasons).
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Offline detroit lightning

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Re: Extracting (and "fixing") Audio from a Video recording
« Reply #2 on: October 12, 2012, 02:52:02 PM »
Ok - thanks!

Offline TimeBandit

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Re: Extracting (and "fixing") Audio from a Video recording
« Reply #3 on: October 13, 2012, 03:56:51 AM »
if distorted means overloaded the camera mic there might be not a possible way to fix it ...
2015 rig: CA-11 -> CA-9100 -> PCM-M10
2016 rig: Sony PCM-M10 + SP-SPSB-4 microphone plug-in power supply +  SP-CMC8 with Low Sens mod
[backup: CA-9100 - Tascam DR-05 Firmware 2.0 + Yamaha Pocketrak W24]
video 2016: Casio EX-100 HS (same as Olympus Stylus1 - but much smaller - japan import not availiable in EU)

 

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