[FFmpeg-user] Channel manipulation and audio filter equivalencies

[adam smith]

> On 18 Nov 2020, at 21:55, Chris Angelico <rosuav at gmail.com> wrote:
> 
> But when I tried things along these lines, I got complaints that some
> of the outputs weren't connected to anything.

I didn’t add the input stream as I am not sure what stream it is on your source.
If could be something like…

ffmpeg -stats -y -i Original.mkv -filter_complex
"[0:1]channelsplit=channel_layout=7.1:channels=LF|RF[lf][rf];[lf][rf]amerge=inputs=2[aout]"
-map 0:v -map "aout" -map 0:s channel_split.mkv