RTSP stream problem

I am sending rtmp stream to wowza:

ffmpeg -i rtmp://SourceStreamIP -preset fast -acodec aac -strict experimental -ar 44100 -ac 2 -b:a 96k -vcodec libx264 -b:v 900k -f flv rtmp://mywowzaIP:1935/live/i.stream

Then i am playing this stream from rtmp and rtsp devices

RTMP stream pays smooth, but RTSP has problems (frame loss, cubicals )

Whats the problem ?

Try playing back via rtsp to reproduce the problem and then provide your access logging that derived from this test. We may be better apt to find the issue with this logging information in context.