[Bug 60045] New: quartz/winegstreamer: WMV2 video hangs with infinite "Failed to push qos event to pad qz_sink_0", click-to-skip unresponsive

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=60045

            Bug ID: 60045
           Summary: quartz/winegstreamer: WMV2 video hangs with infinite
                    "Failed to push qos event to pad qz_sink_0",
                    click-to-skip unresponsive
           Product: Wine
           Version: 11.13
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: quartz
          Assignee: [e-mail]
          Reporter: [e-mail]
  Target Milestone: ---
      Distribution: ---

Created attachment 81504
  --> http://bugs.winehq.org/attachment.cgi?id=81504
Full debug log: WINEDEBUG=+quartz,+winegstreamer +
GST_DEBUG=queue2:6,GST_EVENT:6,GST_PADS:6

Wine version: wine-11.13 (also reproduced on 11.12)

Distribution: CachyOS Linux (Arch-based), kernel 7.1.3-2-cachyos

GStreamer: 1.28.5 (gst-libav, gst-plugins-{good,bad,ugly} all installed)

A Chinese game (曹操传 modern mod "云荒逍遥传") uses MCI/quartz to play
WMV2 intro videos (Logo.wmv, Mov001.wmv, Mov002.wmv). Under Wine:

1. The game window appears black.
2. Console floods with "Failed to push qos event to pad qz_sink_0" (~33/sec).
3. Clicking does nothing — cannot skip intro.
4. Eventually access violation (c0000005) in the video thread.

Video file details (confirmed by ffprobe):
- Container: ASF (.wmv)
- Video: WMV2 (WMV2 / 0x32564D57), yuv420p, 30fps
- Audio: WMAv2, 44100Hz, 128kbps

Key evidence from WINEDEBUG=+quartz,+winegstreamer + GST_DEBUG=queue2:6:
- image_presenter_PresentImage IS called successfully with valid timestamps.
- image_presenter_StartPresenting is a stub! (fixme: ... stub!)
- quartz perform_qos calculates ~33ms jitter (normal for 30fps) and calls
wg_parser_stream_notify_qos.
- This leads to push_event(qos_event, pad="qz_sink_0") in
dlls/winegstreamer/unixlib.c:234.
   - gst_pad_push_event() returns FALSE — the upstream queue2 / stepper element
     does not accept the QoS event.
   - queue2 retries indefinitely → error flood → Wine message queue never
dispatches WM_LBUTTONDOWN → skip-by-click never fires.

GStreamer itself decodes the file perfectly:
$ gst-launch-1.0 filesrc location=Logo.wmv ! decodebin ! videoconvert !
fakesink
   → Preroll → Play → EOS in ~2 seconds, no errors.

Workaround: removing the .wmv files from the game directory lets the game fall
through to the main menu (file-not-found path works).

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