Quicktime RTSP caching

Hi,

Does anyone know how to change/set RTSP caching for Quicktime?

I have a RTSP MPEG video stream. With VLC, I can set the rtsp-caching
to e.g. 150ms. When viewing the video with VLC, I get a video delay of
appr. half a second. With Quicktime, I cannot set such a caching
setting. When viewing the same video stream with Quicktime, I get a
video delay of appr. 3 seconds.

Thanks,

Huub