We have our transcoder (based on VLC) serving up some H.264 live streams in Asia via RTMP. We are pulling these RTMP streams to our Wowza edge server in Dallas, and using the "liverepeater-edge" stream type.
Everything is smooth, with no buffering or latency. However intermittently (maybe once every 2-3 minutes, and lasts up to 5 seconds) we are seeing what appears to be "scrambled" video. The audio continues to be stable, but for a few seconds the video looks like those seedy Pay-Per-View channels on cable that we curiously tried to watch as kids.
I think it might be happening when action is "faster" like higher framerate. Not sure yet. Viewing the RTMP source directly from Asia we don't see this issue happening at all.
I hope this is just a tuning related issue, but your help is GREATLY appreciated.