Details
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Bug
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Resolution: Incomplete
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P1: Critical
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None
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5.15.3
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windows 10
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Windows
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Multimedia Wk 13-14, Multimedia wk 15-16
Description
Im playing a mp3 file using QMediaPlayer as a background music for my program. most of times it work without any problem, but in some users system sometimes somehow it make the whole program crash without any message... I generated a dump from user system that have this problem and here is some part of it:
... READ_ADDRESS: 0000000000000000 ERROR_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%p referenced memory at 0x%p. The memory could not be %s. EXCEPTION_CODE_STR: c0000005 EXCEPTION_PARAMETER1: 0000000000000000 EXCEPTION_PARAMETER2: 0000000000000000 IP_ON_HEAP: 00000217f887a290 The fault address in not in any loaded module, please check your build's rebase log at <releasedir>\bin\build_logs\timebuild\ntrebase.log for module which may contain the address if it were loaded. FRAME_ONE_INVALID: 1 STACK_TEXT: 000000ec`27efe910 00000217`f887a290 : 000000ec`27efea10 00000000`00000000 00000217`f8879360 00000000`00000001 : SMM_MP4Demuxer+0x604c 000000ec`27efe918 000000ec`27efea10 : 00000000`00000000 00000217`f8879360 00000000`00000001 000000ec`27efe944 : 0x00000217`f887a290 000000ec`27efe920 00000000`00000000 : 00000217`f8879360 00000000`00000001 000000ec`27efe944 00000000`00000001 : 0x000000ec`27efea10 STACK_COMMAND: ~7s; .ecxr ; kb SYMBOL_NAME: SMM_MP4Demuxer+604c MODULE_NAME: SMM_MP4Demuxer IMAGE_NAME: SMM_MP4Demuxer.ax FAILURE_BUCKET_ID: NULL_POINTER_READ_c0000005_SMM_MP4Demuxer.ax!Unknown OS_VERSION: 10.0.19041.1 BUILDLAB_STR: vb_release OSPLATFORM_TYPE: x64 OSNAME: Windows 10 IMAGE_VERSION: 1.0.2010.23 FAILURE_ID_HASH: {1f1f19f2-de50-d883-9048-8a7795f973e9} Followup: MachineOwner
its says that the problem is coming from `SMM_MP4Demuxer` Module, by looking at its name I think its something that coming from `QMediaPlayer`...
here is a minimal reproducible of my code:
#include <QtWidgets/qapplication.h> #include <QWidget> #include <QMediaPlayer> #include <QMediaPlaylist> #include <QtWidgets/QHBoxLayout> #include <QToolButton> #include <QStyle> class Widget : public QWidget { public: explicit Widget(QWidget* parent = Q_NULLPTR) : background_sound(new QMediaPlayer(this)) { setupUi(); QMediaPlaylist* playlist = new QMediaPlaylist(this); playlist->addMedia(QUrl("qrc:/background_sound.mp3")); playlist->setPlaybackMode(QMediaPlaylist::Loop); background_sound->setPlaylist(playlist); background_sound->setVolume(70); connect(background_sound, &QMediaPlayer::mediaStatusChanged, this, [&](QMediaPlayer::MediaStatus status) { if (background_sound->error() == QMediaPlayer::NoError) { if (status == QMediaPlayer::LoadedMedia) background_sound->play(); } }); connect(button, &QToolButton::released, this, [&]() { if (background_sound->state() == QMediaPlayer::PlayingState) { background_sound->pause(); button->setIcon(style()->standardIcon(QStyle::SP_MediaStop)); } else if (background_sound->state() == QMediaPlayer::PausedState) { background_sound->play(); button->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); } }); } ~Widget() = default; private: QMediaPlayer* background_sound; QToolButton* button; void setupUi() { setObjectName(QStringLiteral("MainWidget")); setWindowTitle(tr("Test QMediaPlayer!")); resize(300, 300); auto layout = new QHBoxLayout(this); layout->setObjectName(QStringLiteral("layout")); button = new QToolButton(this); button->setObjectName(QStringLiteral("button")); button->setMinimumSize(50, 50); button->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); // because we are playing it at start layout->addWidget(button); } }; int main(int argc, char* argv[]) { QApplication application(argc, argv); Widget w; w.show(); return QApplication::exec(); }