download lower quality stream from ustream

[StreamRecorder]

When I try to download UStream live streams, I get HD versions only. rtmpsrv shows the same rtmpdump parameters for both HD and SD versions. Is there any way to download lower quality stream from UStream?

p.s.
I tried http://piscui.webear.net/ustream.php which shows a playlist URL only now and ffmpeg stops after downloading one segment. Sometimes when I relaunch the ffmpeg, it shows videos saying that it tries to detect what video quality is better for me thus not downloading any content itself.

I also tried the https://github.com/kenorb/UStream-recorder , but at the moment all its rtmpdump commands lead to downloading HD videos only.