Pure virtual functional call

[Dmitriy_S_]

Hi. We are using QSV h.264 decoder in our product to decode several streams simultaneously (in joined sessions).
At some point, message box pops up which says "R6025 - pure virtual functional call" when inside MFXVideoDECODE_DecodeFrameAsync call.
This happens with libmfxhw64.dll file version 5.14.3.6. Is this a known issue and how it can be avoided?

[Anthony_P_Intel]

Hi.  This is not a known issue, and no one else has reported this specific error message.  We have seen a variety of behaviors when low memory conditions exist, and each application handles warnings and errors slightly differently.

Are you able to reproduce the issue using either the "sample_multi_transcode" application or other simple application which allows joined sessions?

Can you provide information about the platform (hardware ) and drivers being used?  (The output o the mediasdk_sys_analyzer application in the tools\ directory would provide this information.).

If issue is easy to reproduce, you can also try to capture a 'tracer' log using the tool in the mediasdk_tracer\ directory.  With this log we may be able to determine what is occurring.

Thanks

[Dmitriy_S_]

Intel Media SDK System Analyzer (64 bit)

The following versions of Media SDK API are supported by platform/driver:

    Version    Target    Supported    Dec    Enc
    1.0    HW    Yes        X    X    [Adapter 1]
    1.0    SW    Yes        X    X
    1.1    HW    Yes        X    X    [Adapter 1]
    1.1    SW    Yes        X    X
    1.3    HW    Yes        X    X    [Adapter 1]
    1.3    SW    Yes        X    X
    1.4    HW    Yes        X    X    [Adapter 1]
    1.4    SW    Yes        X    X
    1.5    HW    Yes        X    X    [Adapter 1]
    1.5    SW    Yes        X    X
    1.6    HW    Yes        X    X    [Adapter 1]
    1.6    SW    Yes        X    X
    1.7    HW    Yes        X    X    [Adapter 1]
    1.7    SW    Yes        X    X
    1.8    HW    Yes        X    X    [Adapter 1]
    1.8    SW    Yes        X    X

Graphics Devices:
    Name                                         Version             State
    NVIDIA GeForce GTX 760                       9.18.13.3221        08
    NVIDIA GeForce GTX 760                       9.18.13.3221        Active
    Intel(R) HD Graphics 4600                    10.18.10.3540       08

System info:
    CPU:    Intel(R) Core(TM) i5-4440 CPU @ 3.10GHz
    OS:    
Installed Media SDK packages (be patient...processing takes some time):

Analysis complete... [press ENTER]

[Dmitriy_S_]

I was not able to reproduce this issue with modified sample_decode that runs multiple threads with joined sessions decoding same stream. I will try to capture tracer logs next time.

[Dmitriy_S_]

Hi again. This same problem reproduces again and again in our application. Here are analyzer output and application minidump. The popup window shows up when decoding thread calls DecodeFrameAsync. I hope this information will help.