TESTED ON UBUNTU 's 15.10 (Wily) and 12.10 (Quantal Quetzal) and 13.04 (Raring Ringtail)
it works on every edition after 12.04
After trying lots of different kind of things to solve this problem (with any luck on mi side) I figure that the problem consists that the videos where running too fast, in fast forward, like 2 times faster making videos unwatchable and sound sharper. That's when I started to do some benchmark tests, and process speed comparisons.
Then, I came to the conclussion that the speed of the whole "netflix-desktop" "wine" "silverlight" and maybe other process launched from netflix-desktop were obeying the speed of the pulseaudio daemon, and this last was running too fast in my box, a 4 core cpu processor.
THE SOLUTION. (tested on 32 bits and 64 bits ubuntu distributions)
By slowing down the pulseaudio daemon with cpulimit, all run like a charm !
1- Install cpulimit if you don't have it.
$ sudo apt-get install cpulimit
2- Launch cpulimit slowing down pulseaudio and run netflix after that.
$ cpulimit -e pulseaudio -c 1 -l 10 & netflix-desktop
(although I use pulseaudio, it could work for other audio daemons, you should try)
-e pulseaudio (finds the pid by the name)
-c 1 (uses only 1 core)
-l 10 (limit the core to 10% of its speed for the chosen application)
& netflix-desktop (runs netflix-desktop inmediatly after cpulimit succeeds launching)
ENJOY !!! (please "like" it if you find it useful)