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doc/filters: add examples for amix to subsection

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Gyan Doshi 2022-08-09 10:16:50 +05:30
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doc/filters.texi
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@ -2210,13 +2210,6 @@ and @var{pan} audio filters support many formats). If the @var{amix}
input has integer samples then @ref{aresample} will be automatically
inserted to perform the conversion to float samples.
For example
@example
ffmpeg -i INPUT1 -i INPUT2 -i INPUT3 -filter_complex amix=inputs=3:duration=first:dropout_transition=3 OUTPUT
@end example
will mix 3 input audio streams to a single output with the same duration as the
first input and a dropout transition time of 3 seconds.
It accepts the following parameters:
@table @option
@ -2252,6 +2245,26 @@ Beware of heavy clipping if inputs are not normalized prior or after filtering
by this filter if this option is disabled. By default is enabled.
@end table
@subsection Examples
@itemize
@item
This will mix 3 input audio streams to a single output with the same duration as the
first input and a dropout transition time of 3 seconds:
@example
ffmpeg -i INPUT1 -i INPUT2 -i INPUT3 -filter_complex amix=inputs=3:duration=first:dropout_transition=3 OUTPUT
@end example
@item
This will mix one vocal and one music input audio stream to a single output with the same duration as the
longest input. The music will have quarter the weight as the vocals, and the inputs are not normalized:
@example
ffmpeg -i VOCALS -i MUSIC -filter_complex amix=inputs=2:duration=longest:dropout_transition=0:weights="1 0.25":normalize=0 OUTPUT
@end example
@end itemize
@subsection Commands
This filter supports the following commands: