[FFmpeg-user] 5.1 + stereo

[Hanna Frangiyyeh]

Hi Guys;
I have a video file and audio file.  The audio file has 5.1 + stereo.  The
stereo audio is on channels 7&8.
Is it possible to take the stereo tracks(7&8) and put them on the video
file as stereo channels 1&2.  If so, how to accomplish this?
Thank you.
Hanna