Matches the stream with this index. E.g. @code{-threads:1 4} would set the
thread count for the second stream to 4. If @var{stream_index} is used as an
additional stream specifier (see below), then it selects stream number
-@var{stream_index} from the matching streams.
+@var{stream_index} from the matching streams. Stream numbering is based on the
+order of the streams as detected by libavformat except when a program ID is
+also specified. In this case it is based on the ordering of the streams in the
+program.
@item @var{stream_type}[:@var{additional_stream_specifier}]
@var{stream_type} is one of following: 'v' or 'V' for video, 'a' for audio, 's'
for subtitle, 'd' for data, and 't' for attachments. 'v' matches all video
@item filter=@var{filter_name}
Print detailed information about the filter name @var{filter_name}. Use the
@option{-filters} option to get a list of all filters.
+
+@item bsf=@var{bitstream_filter_name}
+Print detailed information about the bitstream filter name @var{bitstream_filter_name}.
+Use the @option{-bsfs} option to get a list of all bitstream filters.
@end table
@item -version
@code{@var{program}-@var{YYYYMMDD}-@var{HHMMSS}.log} in the current
directory.
This file can be useful for bug reports.
-It also implies @code{-loglevel verbose}.
+It also implies @code{-loglevel debug}.
Setting the environment variable @env{FFREPORT} to any value has the
same effect. If the value is a ':'-separated key=value sequence, these
@end example
All codec AVOptions are per-stream, and thus a stream specifier
-should be attached to them.
+should be attached to them:
+@example
+ffmpeg -i multichannel.mxf -map 0:v:0 -map 0:a:0 -map 0:a:0 -c:a:0 ac3 -b:a:0 640k -ac:a:1 2 -c:a:1 aac -b:2 128k out.mp4
+@end example
+
+In the above example, a multichannel audio stream is mapped twice for output.
+The first instance is encoded with codec ac3 and bitrate 640k.
+The second instance is downmixed to 2 channels and encoded with codec aac. A bitrate of 128k is specified for it using
+absolute index of the output stream.
Note: the @option{-nooption} syntax cannot be used for boolean
AVOptions, use @option{-option 0}/@option{-option 1}.