Silence detection can only be set with algorithm version 3.
Reviewed-by: Gyan Doshi <ffmpeg@gyani.pro>

Fixes #8032.

Update documentation for flags/flags2
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>

Now they are exactly 10 seconds long.

Fixes #5684.

Signed-off-by: Lou Logan <lou@lrcd.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Add layouts for existing examples.
Reviewed-by: Gyan <ffmpeg@gyani.pro>
Signed-off-by: Limin Wang <lance.lmwang@gmail.com>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Implemented as a variant of the hash muxer, reusing most functions,
and making use of the previously introduced array of hashes.
Signed-off-by: Moritz Barsnick <barsnick@gmx.net>
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Moritz Barsnick <barsnick@gmx.net>

Fixes ticket #4799.
Analyzed-by: Aleksandr Ustinov

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: James Almer <jamrial@gmail.com>