[Bug 55638] New: mf:transform - test_h264_decoder_concat_streams() sometimes fails on Windows 7

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55638

Bug ID: 55638
           Summary: mf:transform - test_h264_decoder_concat_streams()
                    sometimes fails on Windows 7
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: mfplat
          Assignee: [e-mail]
          Reporter: [e-mail]

mf:transform - test_h264_decoder_concat_streams() sometimes fails on Windows 7:

transform.c:4510: Test failed: GetElementCount returned 0x78
transform.c:4512: Test failed: sample 97: got 1 buffers
transform.c:4512: Test failed: sample 97: got sample time 14800000
transform.c:4512: Test failed: sample 97: got sample duration 400000
transform.c:1085: Test failed: sample 97: buffer 0: got unexpected buffer

See https://test.winehq.org/data/patterns.html#mf:transform

Note that the bad GetElementCount() return value is always 0x78 (120) and the
sample time and durations are always the same too.

This set of failure is quite rare with 1.5 to 2 instances per month. The first
known instance happened on 2023-06-01 (no instance in the previous 5 months):
* 2023-09-18 win7_newtb-w7u-es
* 2023-09-06 win7_newtb-w7pro64-64
* 2023-09-01 win7_newtb-w7u-2qxl
* 2023-08-28 MR!3636
* 2023-07-06 win7_newtb-w7u-de
* 2023-06-09 MR!3010
* 2023-06-01 MR!2893 (twice)