Emitted timestamps in each stream start from 0, for the first received
RTP packet. Once an RTCP packet is received, that one is used for
sync, emitting timestamps that fit seamlessly into the earlier ones.

Originally committed as revision 26187 to svn://svn.ffmpeg.org/ffmpeg/trunk

This fixes playing RTSP urls with query parameters.

Originally committed as revision 25755 to svn://svn.ffmpeg.org/ffmpeg/trunk

This fixes a regression since svn rev 24752, where the real_setup pointer
was set incorrectly. The arithmetic with the real_setup_cache pointer
is in units of enum AVDiscard, so the sizeof multiplication should be removed.

Patch by Yuriy Kaminskiy, yumkam at mail dot ru.

Originally committed as revision 25684 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25601 to svn://svn.ffmpeg.org/ffmpeg/trunk