X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=doc%2Ffftools-common-opts.texi;h=8ffc3299ce3b651de94f0c3df14fb23696fd5b54;hb=e3a70c7c5ff589ff6ce70fa0a29dc220f95dff17;hp=c362a170fb81e4c83f88ca493136ecce662f4cfd;hpb=3011ecdeb72af7e07f75e701061fb18f0745fd10;p=ffmpeg

diff --git a/doc/fftools-common-opts.texi b/doc/fftools-common-opts.texi
index c362a170fb8..8ffc3299ce3 100644
--- a/doc/fftools-common-opts.texi
+++ b/doc/fftools-common-opts.texi
@@ -87,5 +87,49 @@ 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.