rtmpproto: Track last received timestamp

Some RTMP commands need the most recent timestamp as their parameter, so
keep track of it. This must be the most recent one and not e.g. the max
received timestamp as it can decrease again through seeking.

Signed-off-by: Martin Storsjö <martin@martin.st>
rtmpproto: Add pause support

Signed-off-by: Martin Storsjö <martin@martin.st>
ffplay: remove delays when paused from video and subtitle thread

Once the frame queue is full, we will wait anyway.

Signed-off-by: Marton Balint <cus@passwd.hu>
ffplay: remove manual bug option handling code

It is supported as a codec option, and those are already parsed.

Signed-off-by: Marton Balint <cus@passwd.hu>
ffplay: update documentation

Reviewed-by: Lou Logan <lou@lrcd.com>
Signed-off-by: Marton Balint <cus@passwd.hu>
libavutil: Add CAST128 symmetric block cipher

Only ECB mode is supported at the moment

Signed-off-by: Supraja Meedinti <supraja0493@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
configure: add pkg-config support for libx264

Reviewed-by: Carl Eugen Hoyos <cehoyos@ag.or.at>
Tested-by: Carl Eugen Hoyos <cehoyos@ag.or.at>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'f4cd8b80b9cb2a9a4112d8abb1d3b93cd3b4e467'

* commit 'f4cd8b80b9cb2a9a4112d8abb1d3b93cd3b4e467':
  rtmpproto: Track last received timestamp

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '9bec3ca2b878c83d2337bc6095bd51c3e3f8eef0'

* commit '9bec3ca2b878c83d2337bc6095bd51c3e3f8eef0':
  rtmpproto: Add pause support

Conflicts:
	libavformat/version.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>