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Media Express 12.2 (and earlier) crashes with 0xC0000005

PostPosted: Tue Nov 23, 2021 8:46 am
by Roman Ryltsov
We're seeing Media Express crashes on multiple systems equipped with Duo, Duo 2, Quad, Quad 2 cards. Over long time we have been using Desktop Video 10.8.6 as a stable version, which generally worked well. At some point upgrades to newer versions (not only recent but also 11.x) on the same systems started causing Media Express crashes.

Just an example from one of the systems (12.2 there), memory AV logged in event log.

Faulting application name: MediaExpress.exe, version:, time stamp: 0x5fe1d5a4
Faulting module name: unknown, version:, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x0000000000000000
Faulting process id: 0x3cb8
Faulting application start time: 0x01d7e0c272fe5c3a
Faulting application path: C:\Program Files\Blackmagic Design\Media Express\MediaExpress.exe
Faulting module path: unknown
Report Id: 02b6e4b5-36c3-4cbf-995d-545ec9430703
Faulting package full name:
Faulting package-relative application ID:

Fault bucket 1442535699133121267, type 5
Event Name: BEX64
Response: Not available
Cab Id: 0

Problem signature:
P1: MediaExpress.exe
P3: 5fe1d5a4
P4: StackHash_ac46
P6: 00000000
P7: PCH_EA_FROM_ntdll+0x00000000000A0544
P8: c0000005
P9: 0000000000000008

The application starts, shows UI, then there is hourglass for a while and the app is gone. This does not happen on every system, just one some and downgrade to older version resolves the problem.

At the same time the applications talking to DeckLink SDK do work well with the hardware, it's just MediaExpress crashes.

Is there any way to troubleshoot this? Both ways, to possibly collect diagnostics if you're interested to troubleshoot this, or somehow reset Media Express configuration maybe in the case it's somehow corrupt and blocks proper startup.

Re: Media Express 12.2 (and earlier) crashes with 0xC0000005

PostPosted: Mon Nov 29, 2021 6:26 pm
by Roman Ryltsov
(minidump and details posted to support; the issue looks related to OpenGL support on the host vs. certain update in either Media Express or underlying OpenGL module of Qt runtime)