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Old 2nd January 2019, 13:45   #1  |  Link
TCmullet
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Join Date: Nov 2003
Posts: 365
Unusual audio damage - every 3rd sample

BACKGROUND: Sometimes my DVR creates a strange artifact on the audio output that is inaudible to me. It's not til after I capture the video and extract the video and .wav files for Avisynth processing that I discover the problem. (And I worked hard to trace down that it was the DVR causing it, which is solved temporarily by rebooting the DVR. But eventually it slips into artifact mode again without warning.) If I catch it before I've erased the program from the DVR, I can simply recapture. However, I've capped and done a bunch of deleting, so I cannot go back and recapture.

THE NEED: What I need is a way to massage the audio. I need to subtract the value 16,384 from every 3rd sample in the right channel, starting at a specified offset (which will be 0, 1 or 2). Is there some way in Avisynth to do this with my audio track???

I open my audio like this:

audio=wavsource("myvideo.wav")

Last edited by TCmullet; 2nd January 2019 at 14:11.
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