Hello,
I read this:https://software.intel.com/en-us/forums/intel-media-sdk/topic/800921 and I have a similar but not the same bug:
The "old" WHQL driver which was automatically deployed by windows update was "21.20.16.4727".
Everything is working fine with this driver.
Now a new driver is automatically deployed by windows update: 25.20.100.6323.
When we use the old driver (manually restored) our application works fine, the "sample_encode" sample works fine and the application "handbrake" can use Quicksync HW for encoding videos.
When using the new driver: Our application crashes, the "sample_encode" crashes too and "handbrake" uses a software fallback for encoding videos with QuickSync.
I compiled "sample_encode" with latest "Media SDK 2018 R2" installation. Everything("dispatcher binary") is used directly from the installation folder.
The target compute has "i5-6500" cpu and a Q170 Express chipset. There is one additional grafic adapter in system. ("Matrox Orion HD"). The intel grafics adapter is the "primary adapter" set by bios. The os is Windows 10/64 LTSC 1607.
The auto deployment of the driver is a big issue. How can we fix / workaround it in our software (or sample_encode) ?