You're probably using an old version of
ffmpeg, most likely something ancient that shipped with CentOS. Depending on your kernel you can download a static build, or build it yourself to get the latest version.
-v option (or
-loglevel, which is the same), accepts the following parameters:
- ‘quiet’ – Show nothing at all; be silent.
- ‘panic’ – Only show fatal errors which could lead the process to crash,
such as and assert failure. This is not currently used for anything.
- ‘fatal’ – Only show fatal errors. These are errors after which the
process absolutely cannot continue after.
- ‘error’ – Show all errors, including ones which can be recovered from.
- ‘warning’ – Show all warnings and errors. Any message related to
possibly incorrect or unexpected events will be shown.
- ‘info’ – Show informative messages during processing. This is in
addition to warnings and errors. This is the default value.
- ‘verbose’ – Same as info, except more verbose.
- ‘debug’ – Show everything, including debugging information.
It does accept numbers, but those are hardcoded values in the
So, you can use those numbers if you want, but it'll of course be easier to just use the string representations.