I repeat that if you fix duration and time using the Fix FLV tool of Replay Media Catcher 4, then the playback is smooth! This is a live stream, so the fix is needed. RMC can apply the 15fps fix automatically like other software does it, and it will work in most cases, but there will be out of sync problems with streams using other timeframe values.

I don't really know what file size should be here. It is strange that rtmpdump gives a different file size after changing the port from 80 to 1935.