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doc: add details to the documentation for ffmpeg -map

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Patch by Mike Sheutzow with some additions and changes by Stefano.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
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Mike Scheutzow 2011-03-20 08:01:41 +01:00 committed by Luca Barbato
parent 17a4ec8e7e
commit cf752d027f
1 changed files with 37 additions and 5 deletions
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doc/ffmpeg.texi
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@ -622,11 +622,43 @@ Synchronize read on input.
@section Advanced options
@table @option
@item -map @var{input_stream_id}[:@var{sync_stream_id}]
Set stream mapping from input streams to output streams.
Just enumerate the input streams in the order you want them in the output.
@var{sync_stream_id} if specified sets the input stream to sync
against.
@item -map @var{input_file_id}.@var{input_stream_id}[:@var{sync_file_id}.@var{sync_stream_id}]
Designate an input stream as a source for the output file. Each input
stream is identified by the input file index @var{input_file_id} and
the input stream index @var{input_stream_id} within the input
file. Both indexes start at 0. If specified,
@var{sync_file_id}.@var{sync_stream_id} sets which input stream
is used as a presentation sync reference.
The @code{-map} options must be specified just after the output file.
If any @code{-map} options are used, the number of @code{-map} options
on the command line must match the number of streams in the output
file. The first @code{-map} option on the command line specifies the
source for output stream 0, the second @code{-map} option specifies
the source for output stream 1, etc.
For example, if you have two audio streams in the first input file,
these streams are identified by "0.0" and "0.1". You can use
@code{-map} to select which stream to place in an output file. For
example:
@example
ffmpeg -i INPUT out.wav -map 0.1
@end example
will map the input stream in @file{INPUT} identified by "0.1" to
the (single) output stream in @file{out.wav}.
For example, to select the stream with index 2 from input file
@file{a.mov} (specified by the identifier "0.2"), and stream with
index 6 from input @file{b.mov} (specified by the identifier "1.6"),
and copy them to the output file @file{out.mov}:
@example
ffmpeg -i a.mov -i b.mov -vcodec copy -acodec copy out.mov -map 0.2 -map 1.6
@end example
To add more streams to the output file, you can use the
@code{-newaudio}, @code{-newvideo}, @code{-newsubtitle} options.
@item -map_meta_data @var{outfile}[,@var{metadata}]:@var{infile}[,@var{metadata}]
Deprecated, use @var{-map_metadata} instead.