Mono to Stereo using FFMPEG I have an unusual problem that I hope someone can help me solve.
I have 45 video files that I'm batch encoding as MP4.
Some of those files have their audio channel position set to Front L R and others have have it set to Front C.
However, the distribution system which these videos are sent to (and which I have no control over) does some re-processing of these videos.
All the videos that have their Channel Position set to Front C are coming back with distorted audio. 

My question is:

Does anyone know how to encode a video with ffmpeg and force the audio channel positions to be Front L R?
(I have carefully studied this page (https://trac.ffmpeg.org/wiki/AudioChannelManipulation#monostereo) but it was not obvious what the solution might be)

Thank you!
If you run ffmpeg -layouts, you will see that stereo indicates the presence of two channels, one assigned as Front Left and the other as Front Right. If you use -ac 2 in your encode, ffmpeg will create a stereo layout output by default. FFmpeg does not display the individual channel assignments in the readout of the file.