Re: Captured Video Not Producing Sound on Some Systems
On 10/24/10, Rob Owens <email@example.com> wrote:
> That was a hunch I had, and I corrected it in the sample video I sent
> you. Here's what I did.
> 1) Get the audio track from the video:
> ffmpeg -i yourvideo.flv -vn sound.wav
> 2) Get the video track from the video:
> ffmpeg -i yourvideo.flv -vcodec copy -an video.flv
> 3) Open the audio track in Audacity. On the left of the screen, click
> the drop-down menu next to the audio track name. Choose "split stereo
> track". Now you can delete the bad audio channel, then copy and paste
> the good one over. Then export as something lossless (flac or wav --
> I'll use sound-fixed.flac in my example).
> Note that you could instead do "Stereo to Mono" under the Tracks menu,
> but that combines the good and bad channel, resulting in half the volume
> of the original.
> 4) Combine the video with the corrected audio:
> ffmpeg -i video.flv -i sound-fixed.flac -vcodec copy yourfixedvideo.flv
> Explanation of some ffmpeg switches:
That is similar to how I repaired my videos, except I used AVIDemux
instead of ffmpeg to pull the audio out and put it back in. Other
than that, that was pretty much the exact process I used. On one box
I did the Split Track and delete bad method, and on the other I did
the Stereo to Mono option, because I could not find the first option
on that system's version of Audacity. I'm sure it's there somewhere,
but I got tired of looking for it.
(ProTip to any lurking devs. Stop Changing the ****** interface
around for no apparent reason please. If it's broke, don't try to fix