ffmpeg libtwolame mp2 how set options like mode or copyright

Question

How I can change the audio mode (and other option flags) for libtwolame (mp2) encoder in ffmpeg?

I've tried with

ffmpeg -f jack -i ffmpeg -r 48000 -c:a mp2 -mode "m" -b:a 128k

and also

-mode 'm'
-mode "mono"
-mode 'mono'

but the encoded stream is in stereo - always.
...Also, other options seem not to work, like "copyright" and "original" and others...

Answer 1

Example command:

ffmpeg -i input -c:a libtwolame -mode mono -copyright 1 -original 1 output.mp2

• Make sure your ffmpeg was compiled with --enable-libtwolame. You can check this by executing the plain ffmpeg command and referring to the configuration line in the output.

• If you want to encode with libtwolame you have to use -c:a libtwolame.

• -mode, -copyright, and -original are private options only for libtwolame, so they will be ignored by the native FFmpeg MP2 audio encoder (-c:a mp2).

• See ffmpeg -h encoder=libtwolame and FFmpeg Codecs Documentation: libtwolame for more options.