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d01fc48848
The Recording tab docs said only that 'the parameters to the command
will be the event id and the monitor id', which is true only when the
command contains no '%' - and hides several surprises discovered by
reading zm_monitor.cpp:
- without '%' the whole string is exec'd as ONE executable path with
event id / monitor id appended; a command with inline arguments
('/path/script.sh start') is treated as a single file name and fails;
- with '%' the string runs via /bin/sh -c after %EID%/%MID%/%EC%
substitution, and nothing is appended automatically (%EC% exists for
the start command only);
- the child runs in the background as the capture-process user with all
file descriptors closed, so any output silently disappears;
- the end command fires after the event is finalized, so the video file
is complete by then.
Document all of that where the two options are described.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>