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I sometimes (like now) need to process the audio of a lot of mpeg videos (500 in this case). In this case I need to delete one of the 2 audio channels (or convert it to mono).

I use Goldwave which can batch process audio files but it can't edit the audio in a video file and then save it in the video format.

Any suggestions?

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This is certainly possible. Some more information is required to provide an exact answer. What is your OS? Can you provide some details on a typical input file? What exactly do you want to do to the audio? Which channel do you want to delete? Is this a stereo input? Do you want to simply silence a channel or duplicate one channel into both channels, or downmix stereo into mono? Now you can see why detailed questions get answers quickly. –  LordNeckbeard Dec 18 '13 at 7:38

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