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  1. Qt
  2. QTBUG-113327

QVideoFrame::map() segfaults on 32bit android

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Details

    • Bug
    • Resolution: Won't Do
    • P2: Important
    • 6.5.2
    • 6.4.3, 6.5.0
    • Multimedia
    • Android
    • 2023wk20FOQtforAndroid, 2023wk22FOQtforAndroid, 2024wk10FOQtforAndroid

    Description

      Problem

      On Android 32bit (armeabi-v7a), the "QVideoFrame::map()" function still segfaults regularly, with a stacktrace looking roughly like this.

      Tried mitigations

      The Qt-Bugtracker contains a few hints to work around this problem, e. g. using a direct conneciton to connect to QVideoSink::videoFrameChanged, and also calling m_videoSink->setRhi(nullptr); to enforce software encoding.

      Applying this workaround fixes the problem on android-arm64, but 32bit is still broken.

      Example Stack Trace

      04-27 15:58:15.998 23327 23327 F DEBUG   :       #00 pc 002b54d6  /data/app/.../lib/arm/libQt6Gui_armeabi-v7a.so (QRhi::thread() const+2) (BuildId: d7507ce6e3b69e6ce78275bc3be913915519e90f)
04-27 15:58:15.998 23327 23327 F DEBUG   :       #01 pc 00078c83  /data/app/.../lib/arm/libQt6Multimedia_armeabi-v7a.so (qImageFromVideoFrame(QVideoFrame const&, QVideoFrame::RotationAngle, bool, bool)+286) (BuildId: 45a8bf65e00147b0771f3689cf22b743cba28db9)
04-27 15:58:15.999 23327 23327 F DEBUG   :       #02 pc 00020cfd  /data/app/.../lib/arm/libplugins_multimedia_androidmediaplugin_armeabi-v7a.so (BuildId: c002cefc12dc4c8685a55e38850d5bd65d6fb2fe)
04-27 15:58:15.999 23327 23327 F DEBUG   :       #03 pc 00074413  /data/app/.../lib/arm/libQt6Multimedia_armeabi-v7a.so (QVideoFrame::map(QVideoFrame::MapMode)+98) (BuildId: 45a8bf65e00147b0771f3689cf22b743cba28db9)

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-97789 Listening on QVideoSink::videoFrameChanged on Android fails to map/unmap QVideoFrame

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-105169 videoFrame.toImage() does not work in a different thread than the video rendering thread

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
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              bartlomiejmoskal Bartlomiej Moskal
              jan.lorenz Jan Lorenz
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              Dates

                Created:
                Updated:
                Resolved:

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