[FFmpeg-user] Where can I find ALL options for FFMPEG's FLAC encoder?

[Барт Гопник]

Where can I find ALL options for FFMPEG's FLAC encoder?

I know only "compression_level" option and "-h encoder=flac" command
to show FLAC encoder specific options:

-lpc_coeff_precision
-lpc_type
-lpc_passes
-min_partition_order
-max_partition_order
-prediction_order_method
-ch_mode

1. How to know minimum and maximum values of "compression_level" parameter?
2. Is there other options/parameters/switches for FLAC encoder? How to know it?
2.1. How to specify for example the block size?