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submodule
ffmpeg
Commits
7d057515
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7d057515
authored
Mar 30, 2013
by
Derek Buitenhuis
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doc: Grammar fixes for strem specifiers section
Signed-off-by:
Derek Buitenhuis
<
derek.buitenhuis@gmail.com
>
parent
0cb2d324
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doc/avtools-common-opts.texi
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7d057515
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@@ -16,18 +16,18 @@ will set the boolean option with name "foo" to false.
@anchor{Stream specifiers}
@section Stream specifiers
Some options are applied per-stream, e.g. bitrate or codec. Stream specifiers
are used to precisely specify which stream(s)
does a given option belong
to.
are used to precisely specify which stream(s)
a given option belongs
to.
A stream specifier is a string generally appended to the option name and
separated from it by a colon. E.g. @code{-codec:a:1 ac3}
option contains
@code{a:1} stream specifier, which matches the second audio stream. Therefore it
separated from it by a colon. E.g. @code{-codec:a:1 ac3}
contains the
@code{a:1} stream specifier, which matches the second audio stream. Therefore
,
it
would select the ac3 codec for the second audio stream.
A stream specifier can match several streams,
the option is then
applied to all
A stream specifier can match several streams,
so that the option is
applied to all
of them. E.g. the stream specifier in @code{-b:a 128k} matches all audio
streams.
An empty stream specifier matches all streams
, for example
@code{-codec copy}
An empty stream specifier matches all streams
. For example,
@code{-codec copy}
or @code{-codec: copy} would copy all the streams without reencoding.
Possible forms of stream specifiers are:
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@@ -36,15 +36,16 @@ Possible forms of stream specifiers are:
Matches the stream with this index. E.g. @code{-threads:1 4} would set the
thread count for the second stream to 4.
@item @var{stream_type}[:@var{stream_index}]
@var{stream_type} is one of: 'v' for video, 'a' for audio, 's' for subtitle,
'd' for data
and 't' for attachments. If @var{stream_index} is given, then
matches stream number @var{stream_index} of this type. Otherwise
matches all
@var{stream_type} is one of
following
: 'v' for video, 'a' for audio, 's' for subtitle,
'd' for data
, and 't' for attachments. If @var{stream_index} is given, then it matches
stream number @var{stream_index} of this type. Otherwise, it
matches all
streams of this type.
@item p:@var{program_id}[:@var{stream_index}]
If @var{stream_index} is given, then matches stream number @var{stream_index} in
program with id @var{program_id}. Otherwise matches all streams in this program.
If @var{stream_index} is given, then it matches the stream with number @var{stream_index}
in the program with the id @var{program_id}. Otherwise, it matches all streams in the
program.
@item #@var{stream_id}
Matches the stream by format-specific ID.
Matches the stream by
a
format-specific ID.
@end table
@section Generic options
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