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low budget coupling audio and video files

To: Daniela Lenti Boero <>
Subject: low budget coupling audio and video files
From: Timothy C Tricas <>
Date: Tue, 08 Aug 2006 09:37:09 -1000
Dear Daniela,

If you are using a DV camera with external audio inputs it can be
easily done.  Our work involves underwater video recordings of fish
behavior and high quality audio of acoustic sounds. We record acoustic
signals with a hydrophone and store that signal on a DAT recorder.
During the recording session, we feed the "line out" signal from the
DAT recorder into the external audio input of the video camera (two
channels).  Thus we place the same audio source on two different

Back in the lab we upload the 1) high quality audio file from the DAT
via SPDIF to the computer and open the file with our audio analysis
program (Cooledit / Adobe Audition), and 2) the video and low quality
audio file and open it with our video software (Cinestream, Adobe
Premiere, or similar).  We then 3) identify the behavior on video with
the sound of interest and enlarge the low quality audio waveform
track, 4) create a new audio track on the video sequence, 5) identify
the same but high quality audio on cooledit, 6) cut, paste and align
the hi and low quality audio on the video sequence editor, and 7) save
or export the video and new audio track to a new movie for subsequent

You can use a similar method to synchronized high speed video with
high quality audio. If you are using standard NTSC video without sound
or a synchronization track, things get more complicated.

I hope this is useful.

tim tricas

* Timothy C. Tricas, Associate Professor of Zoology
* Dept. of Zoology - Hawaii Institute of Marine Biology
* University of Hawaii at Manoa
* 2538 McCarthy Mall, Edmondson Hall
* Honolulu, HI 96822
* UH Manoa: Voice (808)956-8677; Fax 956-9812
* HIMB: Voice (808)236-7495; Lab 236-7466; Fax 236-7443
* Email: 
* Visit Our Lab Website at

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