All the numerical options, if not specified otherwise, accept in input a string representing a number, which may contain one of the International System number postfixes, for example 'K', 'M', 'G'. If 'i' is appended after the postfix, powers of 2 are used instead of powers of 10. The 'B' postfix multiplies the value for 8, and can be appended after another postfix or used alone. This allows using for example 'KB', 'MiB', 'G' and 'B' as postfix.

Generic options
===============

These options are shared amongst the ff* tools.

-L
     Show license.

-h, -?, -help, --help
     Show help.

-version
     Show version.

-formats
     Show available formats.

     The fields preceding the format names have the following meanings:

     D
          Decoding available

     E
          Encoding available

-codecs
     Show available codecs.

     The fields preceding the codec names have the following meanings:

     D
          Decoding available

     E
          Encoding available

     V/A/S
          Video/audio/subtitle codec

     S
          Codec supports slices

     D
          Codec supports direct rendering

     T
          Codec can handle input truncated at random locations instead of only at frame boundaries

-bsfs
     Show available bitstream filters.

-protocols
     Show available protocols.

-filters
     Show available libavfilter filters.

-pix_fmts
     Show available pixel formats.

-loglevel LOGLEVEL
     Set the logging level used by the library. LOGLEVEL is a number or a string containing one of the following values:

     quiet

     panic

     fatal

     error

     warning

     info

     verbose

     debug