@@ -109,4 +109,26 @@ ffmpeg -i file.mpg -acodec copy -vcodec copy \

      -y out.ts

 @end example

+@section null

+

+Null muxer.

+

+This muxer does not generate any output file, it is mainly useful for

+testing or benchmarking purposes.

+

+For example to benchmark decoding with @file{ffmpeg} you can use the

+command:

+@example

+ffmpeg -benchmark -i INPUT -f null out.null

+@end example

+

+Note that the above command does not read or write the @file{out.null}

+file, but specifying the output file is required by the @file{ffmpeg}

+syntax.

+

+Alternatively you can write the command as:

+@example

+ffmpeg -benchmark -i INPUT -f null -

+@end example

+

 @c man end MUXERS