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doc: Grammar fixes for FFmpeg description

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Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
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Derek Buitenhuis 2013-03-30 14:51:05 -04:00
parent 9f597052d4
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1 changed files with 10 additions and 10 deletions
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doc/ffmpeg.texi
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@ -16,26 +16,26 @@ ffmpeg [@var{global_options}] @{[@var{input_file_options}] -i @file{input_file}@
@chapter Description @chapter Description
@c man begin DESCRIPTION @c man begin DESCRIPTION
ffmpeg is a very fast video and audio converter that can also grab from @command{ffmpeg} is a very fast video and audio converter that can also grab from
a live audio/video source. It can also convert between arbitrary sample a live audio/video source. It can also convert between arbitrary sample
rates and resize video on the fly with a high quality polyphase filter. rates and resize video on the fly with a high quality polyphase filter.
ffmpeg reads from an arbitrary number of input "files" (which can be regular @command{ffmpeg} reads from an arbitrary number of input "files" (which can be regular
files, pipes, network streams, grabbing devices, etc.), specified by the files, pipes, network streams, grabbing devices, etc.), specified by the
@code{-i} option, and writes to an arbitrary number of output "files", which are @code{-i} option, and writes to an arbitrary number of output "files", which are
specified by a plain output filename. Anything found on the command line which specified by a plain output filename. Anything found on the command line which
cannot be interpreted as an option is considered to be an output filename. cannot be interpreted as an option is considered to be an output filename.
Each input or output file can in principle contain any number of streams of Each input or output file can, in principle, contain any number of streams of
different types (video/audio/subtitle/attachment/data). Allowed number and/or different types (video/audio/subtitle/attachment/data). The allowed number and/or
types of streams can be limited by the container format. Selecting, which types of streams may be limited by the container format. Selecting which
streams from which inputs go into output, is done either automatically or with streams from which inputs will go into which output is either done automatically
the @code{-map} option (see the Stream selection chapter). or with the @code{-map} option (see the Stream selection chapter).
To refer to input files in options, you must use their indices (0-based). E.g. To refer to input files in options, you must use their indices (0-based). E.g.
the first input file is @code{0}, the second is @code{1} etc. Similarly, streams the first input file is @code{0}, the second is @code{1}, etc. Similarly, streams
within a file are referred to by their indices. E.g. @code{2:3} refers to the within a file are referred to by their indices. E.g. @code{2:3} refers to the
fourth stream in the third input file. See also the Stream specifiers chapter. fourth stream in the third input file. Also see the Stream specifiers chapter.
As a general rule, options are applied to the next specified As a general rule, options are applied to the next specified
file. Therefore, order is important, and you can have the same file. Therefore, order is important, and you can have the same