[FFmpeg-user] --no-sao

[Dennis Mungai]

Here is how it works:

When FFmpeg is built with libx265 support, options passed to the underlying
encoder must be passed wrapped in the documented syntax. For example,
libx264 expects -x264opts.

However, what you're reading online is for the command line x265 utility,
which takes in and translates arguments directly from the terminal (command
translator) and as such, syntax will vary.