It Seems that beta firmware 1.00.Newrec4 resolved a lot of pbs about audio & video settings
Now all settings woks well with that firmware and multiple recorded events works better
(multiple pir events files can be viewed smoothly)
the only things who remain is that if i want a 720p wide angle i need to configure another video profile at 1080p
but in that case i got recorded events at only 7 fps and 1.5Mbits/s quality
I guess it's too much works for that camera (many profiles with high quality)
with firmware 1.00 i could got (but it was ramdom) 720p, wide angle, 14 fps, 3Mbits/s quality
(I still have some records with that quality)