Recently I've changed the player to use HDS link instead of RTMP, and some channels very choppy. I'm using strobeplayer for playback.
I have 2 sample link for debug.
RTMP (this stream playing ok): rtmp://220.127.116.11/live/vtc3HD_500.stream
HDS (choppy): http://18.104.22.168/live/vtc3HD_500.stream/manifest.f4m
I'm using vlc/ffmpeg to transcode the stream to 500Kbps.