Failures after streaming recordings from Panasonic DMR-BCT850EG

[lisky]

Great that I found the possibility with streaming from the Panasonic to the PC via Universal Plug'nPlay.

But some recordings are not synchronous (video+audio) ...I mean they start synchronous and after a while they begin
to loose the synchronicity.

Also some (not all! [STRANGE!]) recorded files are without audio when I work in other programs with them (like f. E. Nero Video + Movavi).
I fitted this problem by VLC Mediaplayer 2.2.6 (1. extracting the audio track and 2. "joining" video+audio in Nero Video.

I tried many troubleshootings in the net but I cannot get video+audio synchronous.

Can somebody help???