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.
 

 Options which do not take arguments are boolean options, and set the
 corresponding value to true. They can be set to false by prefixing
 with "no" the option name, for example using "-nofoo" in the
 commandline will set to false the boolean option with name "foo".
 

 @section Generic options
 
 These options are shared amongst the ff* tools.
 
 @table @option
 

 @item -L
 Show license.
 
 @item -h, -?, -help, --help
 Show help.
 
 @item -version
 Show version.
 
 @item -formats
 Show available formats.
 
 The fields preceding the format names have the following meanings:
 @table @samp
 @item D
 Decoding available
 @item E
 Encoding available
 @end table
 
 @item -codecs
 Show available codecs.
 
 The fields preceding the codec names have the following meanings:
 @table @samp
 @item D
 Decoding available
 @item E
 Encoding available
 @item V/A/S
 Video/audio/subtitle codec
 @item S
 Codec supports slices
 @item D
 Codec supports direct rendering
 @item T
 Codec can handle input truncated at random locations instead of only at frame boundaries
 @end table
 
 @item -bsfs
 Show available bitstream filters.
 
 @item -protocols
 Show available protocols.
 
 @item -filters
 Show available libavfilter filters.
 

 @item -pix_fmts
 Show available pixel formats.
 

 @item -loglevel @var{loglevel}
 Set the logging level used by the library.
 @var{loglevel} is a number or a string containing one of the following values:
 @table @samp
 @item quiet
 @item panic
 @item fatal
 @item error
 @item warning
 @item info
 @item verbose
 @item debug
 @end table
 

 By default the program logs to stderr, if coloring is supported by the
 terminal, colors are used to mark errors and warnings. Log coloring

 can be disabled setting the environment variable
 @env{FFMPEG_FORCE_NOCOLOR} or @env{NO_COLOR}, or can be forced setting
 the environment variable @env{FFMPEG_FORCE_COLOR}.

 The use of the environment variable @env{NO_COLOR} is deprecated and

 will be dropped in a following FFmpeg version.

 @end table