The VideoPlayer widget is used to perform playback of video. 更多...
继承 QWidget .
The VideoPlayer widget is used to perform playback of video.
With VideoPlayer you can get results quickly and easily. You can do the standard playback tasks like play (), pause ()，和 stop (), but also set a playback volume and seek - if the media and backend supports seeking.
VideoPlayer is provided for convenience and removes the need to create a media graph with a MediaObject , AudioOutput ，和 VideoWidget . If you need functionality not supported by the player, you can build this graph yourself.
Keep in mind that when the VideoPlayer instance is deleted the playback will stop.
Note also that most of the functions in this class are asynchronous. For instance, a media source may not play immediately after you call the play () 函数。
A play and forget code example:
VideoPlayer *player = new VideoPlayer(Phonon.VideoCategory, parentWidget); connect(player, SIGNAL(finished()), player, SLOT(deleteLater())); player->play(url);
parent argument, if not None, causes self to be owned by Qt instead of PyQt.
构造新 VideoPlayer instance with the specified parent .
category is the category used for the audio output 设备。
parent argument, if not None, causes self to be owned by Qt instead of PyQt.
Constructs a new video widget with a parent 使用 Phonon.VideoCategory as its category.
parent QObject parent.
Get the current time (in milliseconds) of the file currently being played.
Returns true if it is currently paused; otherwise returns false if it is currently playing or stopped.
Returns true if it is currently playing; otherwise returns false if it is currently stopped or paused
This method is also a Qt slot with the C++ signature void load(const Phonon::MediaSource&) .
Starts pre-loading the media data from the specified source and filling audio buffers in the backend.
When there's already a media playing (or paused) it will be stopped (the finished signal will not be emitted).
另请参阅 MediaObject.setCurrentSource ().
Returns the media object being used by the player.
The media object can be accessed directly instead of using the VideoPlayer s convenience functions, e.g., play () and stop (). It is also possible to give the object to other Phonon widgets, e.g., a SeekSlider 或 VolumeSlider .
另请参阅 Phonon.SeekSlider and Phonon.MediaObject .
This method is also a Qt slot with the C++ signature void pause() .
Pauses the playback.
另请参阅 MediaObject.pause ().
This method is also a Qt slot with the C++ signature void play(const Phonon::MediaSource&) .
Plays the media from the given source . Starts playback as fast as possible. This can take a considerable time depending on the URL and the backend.
If you need low latency between calling play() and the sound actually starting to play on your output device you need to use MediaObject and be able to set the URL before calling play(). Note that
audioPlayer->load(url); audioPlayer->play();
doesn't make a difference: the application should be idle between the load and play calls so that the backend can start preloading the media and fill audio buffers.
This method is also a Qt slot with the C++ signature void play() .
Continues playback of paused media. Restarts playback of a stopped (or newly loaded) media.
另请参阅 MediaObject.play () 和 play ().
This method is also a Qt slot with the C++ signature void seek(qint64) .
Seeks to the requested time. Note that the backend is free to ignore the seek request if the media source isn't seekable; you can check this by asking the media object of the VideoPlayer .
player->mediaObject()->isSeekable();
ms parameter is the time in milliseconds from the start of the media.
The call is asynchronous, so currentTime () can still be the old value right after this method was called. If all you need is a slider that shows the current position and allows the user to seek, use the class SeekSlider .
另请参阅 MediaObject.seek (), MediaObject.isSeekable (), and mediaObject ().
This method is also a Qt slot with the C++ signature void setVolume(float) .
设置 volume of the output as voltage factor.
1.0 means 100%, 0.5 means 50% voltage/25% power, 0.0 means 0%
另请参阅 volume ().
This method is also a Qt slot with the C++ signature void stop() .
Stops the playback.
另请参阅 MediaObject.stop ().
Get the total time (in milliseconds) of the file currently being played.
This is the current volume of the output as voltage factor.
1.0 means 100%, 0.5 means 50% voltage/25% power, 0.0 means 0%
另请参阅 setVolume ().
This is the default overload of this signal.
This signal is emitted when the playback finished.