On 10-03-2020 10:16 am, Mark Filipak wrote:
UPDATE
Well, it looks like this is a unix command -- ffmpeg can run
commands,eh? -- to silently delete all files and directories.
Before ffmpeg receives the command arguments, the tokens are parsed by
the shell. Nicolas enclosed the rm invocation in backticks, so the
shell executes it as a command and substitutes its exit code as the
token passed on to ffmpeg. Use of ffmpeg here is incidental - this can
be done with any other program invocation through such a shell.
See
http://www.gnu.org/software/bash/manual/html_node/Command-Substitution.html
Gyan
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