[Bug 56936] New: Videos don't play in Blood West: gst_caps_is_fixed (caps)' failed / media_source_get_service_GetService Unsupported service

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56936

Bug ID: 56936
           Summary: Videos don't play in Blood West: gst_caps_is_fixed
                    (caps)' failed / media_source_get_service_GetService
                    Unsupported service
           Product: Wine
           Version: 9.12
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winegstreamer
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

When playing Blood West (GOG version of the game, mostly upstream Wine with
just esync patches added from staging and common dxvk / vkd3d-proton overrides
in the prefix), cutscenes and intro videos have only sound, but no image. These
look like related error messages (not sure if the issue is with winegstreamer
of mfplat):

0:00:00.094873436 823464 0x7f06a8000db0 ERROR             audio-info
audio-info.c:302:gst_audio_info_from_caps: no rate property given
    (wine:823464): GStreamer-Video-CRITICAL **: 19:53:46.923:
gst_video_info_from_caps: assertion 'gst_caps_is_fixed (caps)' failed
    0:00:00.107035676 823464 0x7f06a8001000 ERROR             audio-info
audio-info.c:302:gst_audio_info_from_caps: no rate property given
    01e0:fixme:mfplat:media_source_get_service_GetService Unsupported service
{dd0ac3d8-40e3-4128-ac48-c0add067b714}.
    01e0:fixme:mfplat:MFPluginControl_IsDisabled (0
{88753b26-5b24-49bd-b2e7-0c445c78c982})
    01e0:fixme:mfplat:MFPluginControl_GetPreferredClsidByIndex (0 0
00007F099DA1EEC8 00007F099DA1EEF0)
    0314:fixme:mfplat:video_processor_ProcessMessage Ignoring message 0.