What option should I use to discard right channel and output with mono audio stream ?ĮDIT: ffmpeg output with map_channel option /home/eric/buildsys/ffmpeg-2.0.1/ffmpeg -i 00402.MTS -s 1280x720 -r 25 -ss 0:00:05.38608 -vcodec libxvid -qscale:v 2 -acodec ac3 -ar 48000 -ab 256k -t 0:00:06.61391 -map_channel -1 -map_channel 0.1.0 m001_test.aviįfmpeg version 2.0.1 Copyright (c) 2000-2013 the FFmpeg developersīuilt on 05:31:18 with gcc 4.8 (Debian 4.8.1-10)Ĭonfiguration: -extra-cflags=-I./static/include -extra-ldflags='-L./static/lib -static' -enable-gpl -enable-version3 -enable-static -disable-shared -disable-debug -enable-runtime-cpudetect -enable-libmp3lame -enable-libx264 -enable-libspeex -enable-libvorbis -enable-libvpx -enable-libfreetype -enable-libxvid -enable-libopencore-amrnb -enable-libopencore-amrwb -enable-libtheora -enable-libvo-aacenc -enable-libvo-amrwbenc -enable-gray -enable-libopenjpeg -disable-ffserverĭuration: 00:01:18.25, start: 0.455556, bitrate: 12217 kb/s I already made tests using '-ac 1' option, but in this case the two channels are merged and I lose ~6dB of gain. I would like the output's audio stream to be mono (with the original left channel only). The audio stream is stereo but the right channel only recorded noise. I use the following command to extract video parts of an '.MTS' record (video).

Ffmpeg copy right audio channel to left