(correctly compute the presentation times based on the RTP timestamps
and the RTCP SR packets)
Originally committed as revision 14045 to svn://svn.ffmpeg.org/ffmpeg/trunk
This can be used later by RDT to get the flags from the RTP packet and
use that for the RealMedia packet (such as whether this RTP packet
represents a keyframe or not). For discussion, see "[PATCH] Realmedia
/ RTSP (RDT)".
Originally committed as revision 11557 to svn://svn.ffmpeg.org/ffmpeg/trunk