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doc: add decoders.texi file

Stefano Sabatini authored on 2011/05/20 03:34:56
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+@chapter Decoders
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+@c man begin DECODERS
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+
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+Decoders are configured elements in FFmpeg which allow the decoding of
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+multimedia streams.
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+
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+When you configure your FFmpeg build, all the supported native decoders
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+are enabled by default. Decoders requiring an external library must be enabled
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+manually via the corresponding @code{--enable-lib} option. You can list all
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+available decoders using the configure option @code{--list-decoders}.
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+
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+You can disable all the decoders with the configure option
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+@code{--disable-decoders} and selectively enable / disable single decoders
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+with the options @code{--enable-decoder=@var{DECODER}} /
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+@code{--disable-decoder=@var{DECODER}}.
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+
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+The option @code{-codecs} of the ff* tools will display the list of
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+enabled decoders.
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+
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+A description of some of the currently available decoders follows.
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+
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+@c man end DECODERS
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@@ -1052,6 +1052,7 @@ file to which you want to add them.
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 @c man end EXAMPLES
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 @include eval.texi
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+@include decoders.texi
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 @include encoders.texi
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 @include demuxers.texi
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 @include muxers.texi
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 @c man end
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 @include eval.texi
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+@include decoders.texi
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 @include demuxers.texi
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 @include muxers.texi
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 @include indevs.texi
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@@ -111,6 +111,7 @@ with name "STREAM".
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 @end table
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 @c man end
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+@include decoders.texi
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 @include demuxers.texi
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 @include protocols.texi
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 @include indevs.texi