I found out that one (cheap) way is to simply install the VLC media player and transfer the video from the PC there, following the instructions of the android-video-streaming-example .
So, in android activity, it looks something like this:
myVideoView.setVideoURI(Uri.parse("rtsp://192.168.2.3:5544/"));
Now working on my application, but the backlog is terrible (5+ seconds), so the question is still open for better answers, while I will experiment with other things ..
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