Command to save a Still from an output

Is this possible?
Is there a custom command to use in the client to save a still from an output?

Sure use ADD <channel> IMAGE <filename> and replace <channel> with the number of your output (usually 1) and <filename> with the name of the file you want to write. It will be put in Caspars media folder.

The command is documented here.

Thank you! I needed this today and you came through as always! thx @didikunz

In the official client there is “Channel Snapshot” under tools/other

and a very simple trick to know the amcp command is to use the client and check what does receive the server console (or the log file), as if you need it for your own client