i downgraded to 2.1.5 Rincewind and now that is working.
i have no time to figure out what was wrong, nor to download a newer version. the Weatherwax said it's the latest version. as long as i have a working version which is not terribly old it's good enough for me.
edit: the stream has been stable now for about half an hour.
i made a small experiment: i recorded the stream with both the Potplayer and the VLC. Potplayer makes mkv-format video about 13 Mby/min and the VLC makes mp4-video about 14 MBy/min. that's almost the same.
the difference is that mp4 format seems to have slightly better resolution (clearer picture). maybe i should change the Potplayer format to mp4.
edit again: i made another experiment, recording both mkv and mp4. the difference in picture quality is so small that i don't think that it can be seen after the Y-tube treatment.
btw: it's raining in the forest, a lot of plain water.
