To: Nat
The files seems to be all ok, since it did run without a message.
I am trying to render a Video, the Video part is recorded with Fraps (avi, 30fps, 1080p) and the audio is the standard exported wav from audacity.
Then I go to "Create Film" -> "Web" -> "YouTube", pick the "HD Video fro YouTube" option and change the Size to 1920x1080, the Framerate to 30, the Audio Samplesize to 32bit and the Audio Bitrate to 320kbps.
Then I hit Render and after about 3-8 Minutes (varies every time) it stoips with the message displayed above.
Since the only parameter that changed from working to not working is the hardware, I will post that here too:
Graphic
then: Radeon HD 6670
now: GTX 970
CPU
then: Athlon II x4
now: Xeon E3
OS is Win 8.1 x64, it is still the same installation of the OS.