...it's a TS file with 10% of its data removed to simulate a poor network link.
https://www.dropbox.com/s/4xneayqoote7q ... re.ts?dl=0
It plays without crashing (but with many artifacts, obviously) under software or under D3D11VA. But not DXVA2.
I think it's related to HEVC, because a similar file encoded using H.264 doesn't produce this issue, although I've not tested that hypothesis properly yet.
The problem has been introduced some time during February this year as it doesn't crash the 1st Feb nightly, but crashes the 1st March nightly onwards, including today's build.
I will continue narrowing it down by testing the nightlies using a manual binary search and then try and find some suspicious-looking check-ins.
PS This may or may not be the same issue, but I have also noticed that if I skip the first chunks of TS data received over the network until I find the first packet with the random access indicator in it, and then send from this point on to VLC that this was crashing DXVA2 too.