From b3dd2010afb46d5e91117067b5e9e1f9dcd18df8 Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Fri, 2 Sep 2011 22:17:38 +0200 Subject: doc: cosmetics, rename fftools-common-opts to avtools-.... --- doc/avtools-common-opts.texi | 138 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 138 insertions(+) create mode 100644 doc/avtools-common-opts.texi (limited to 'doc/avtools-common-opts.texi') diff --git a/doc/avtools-common-opts.texi b/doc/avtools-common-opts.texi new file mode 100644 index 0000000000..e7c1bba4ac --- /dev/null +++ b/doc/avtools-common-opts.texi @@ -0,0 +1,138 @@ +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 av* 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 -sample_fmts +Show available sample 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 Libav version. + +@end table + +@section AVOptions + +These options are provided directly by the libavformat, libavdevice and +libavcodec libraries. To see the list of available AVOptions, use the +@option{-help} option. They are separated into two categories: +@table @option +@item generic +These options can be set for any container, codec or device. Generic options are +listed under AVFormatContext options for containers/devices and under +AVCodecContext options for codecs. +@item private +These options are specific to the given container, device or codec. Private +options are listed under their corresponding containers/devices/codecs. +@end table + +For example to write an ID3v2.3 header instead of a default ID3v2.4 to +an MP3 file, use the @option{id3v2_version} private option of the MP3 +muxer: +@example +ffmpeg -i input.flac -id3v2_version 3 out.mp3 +@end example + +You can precisely specify which stream(s) should the codec AVOption apply to by +appending a stream specifier of the form +@option{[:@var{stream_type}][:@var{stream_index}]} to the option name. +@var{stream_type} is 'v' for video, 'a' for audio and 's' for subtitle streams. +@var{stream_index} is a global stream index when @var{stream_type} isn't +given, otherwise it counts streams of the given type only. As always, the index +is zero-based. For example +@example +-foo -- applies to all applicable streams +-foo:v -- applies to all video streams +-foo:a:2 -- applies to the third audio stream +-foo:0 -- applies to the first stream +@end example + +Note -nooption syntax cannot be used for boolean AVOptions, use -option +0/-option 1. + +Note2 old undocumented way of specifying per-stream AVOptions by prepending +v/a/s to the options name is now obsolete and will be removed soon. -- cgit v1.2.3