MPlayer audio channel (left/right) switching

Question

I'm trying to make an application, media player using mplayer slave mode. Any clue about switching VCD Karaoke channel (left and right) on the fly, while the video is playing on the mplayer-slave mode?

Thanks.

Answer 1

[SOLVED]

switching audio track with

LEFT echo "af pan=2:1:1:0:0" > slave_fifo_file

RIGHT echo "af pan=2:0:0:1:1" > slave_fifo_file