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Signed-off-by: Mattias Andrée <m@maandree.se>

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+.TH FFEXTRACT-AUDIO 1 FFUTILS
+.SH NAME
+ffextract-audio \- create an audio file from a video file
+
+.SH SYNOPSIS
+.B ffextract-audio
+[-Dry]
+.I in-file
+.RI [ out-file ]
+
+.SH DESCRIPTION
+.B ffextract-audio
+extracts the audio track from
+.I in-file
+and copies it into the new file
+.IR out-file .
+
+.SH OPTIONS
+.TP
+.BR \-D
+Remove the original file upon success.
+.TP
+.BR \-r
+Process all files in
+.I in-file
+recursively.
+.TP
+.BR \-y
+Overwrite output file if it already exists.
+
+.SH OPERANDS
+.TP
+.I in-file
+Video file or, if the
+.B -r
+option is used, directory of video files
+to extract the audio track from.
+.TP
+.I out-file
+Output file or output directory, if
+.I in-file
+is a directory.
+
+If
+.I out-file
+is omitted,
+.I in-file
+is used except the filename suffix is
+replaced to appropriately reflect the file format
+used for the audio track.
+Otherwise if the
+.B -r
+option is used,
+the files names found inside
+.I in-file
+are appended to
+.IR out-file
+and the filename suffix are likewise replaced.
+
+.SH EXIT VALUE
+.TP
+0
+Successful completely.
+.TP
+1
+An error occurred.
+
+.SH SEE ALSO
+.BR ffmpeg (1),
+.BR ffextract-frame (1),
+.BR ffget-audio-extension (1),
+.BR ffuse-frame (1)