On 2026-05-17 13:24, Hwaen Ch'uqi via ffmpeg-user wrote:
Greetings. I have a video file in which the audio comes only out of one ear - the left ear - when listening with headphones. Is there a way to pipe the left-ear sound to the right as well? Currently, there is no sound whatsoever in the right ear.
It's a long while ago that I last had to do this, but searching online suggests that the necessary command is of the form ...
ffmpeg -i StereoWithOnly1Channel.mp3 -ac [1 or 2] StereoWith2IdenticalChannels.mp3
... where the '1 or 2' is either 1 or 2 depending on which channel in the source has the actual sound.
But, as I say, it's a long time since I had to do this, others may be able to comment more fully.
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