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I am new to qml. I would like to know how the video is played in the qml. How the video is handled in the back-end(The classes and modules responsible for video playback). How can i add a custom player to play back video in QML? Is there any documents on this? Is there any tutorial for writing the qt-plugin for video playback.
I don't know where to start looking? Please Help. Thanks in advance.
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Press full_screen to enter full screen (if QMediaPlayer can enter/quit full screen itself, then this feature is not necessary) press rearrange to put the playing window from top-left to top-right. additional: fast forward and rewind (again, if QVideoPlayer or something Qt provided not already has this feature)
QML is compiled to an optimized bytecode-like stream and the JavaScript expressions pass through an optimized evaluator for simple expressions.
The qmlscene utility is meant to be used for testing your QML applications, and not as a launcher in a production environment. To launch a QML application in a production environment, develop a custom C++ application or bundle the QML file in a module.
Creating and Running QML Projects For simple UI files such as this one, select File > New File or Project > Application (Qt Quick) > Qt Quick Application - Empty from within Qt Creator. Pressing the green Run button runs the application. You should see the text Hello, World! in the center of a red rectangle.
It seems that you are a newcomer to the topic, so I will start with the basics.
The responsible part of the Qt architecture is QtMultimedia for this. That is the module I would start taking a look at. This essential modul is responsible for the audio and video bits in Qt. It deals with the boiler plate as well as the convenient higher-level interface like QML.
It really depends on what video playback you would like to write. You can find the existing backends in here.
As for writing a new backend and/or plugin, this post gives some insight how this has been achieved for one. The official documentation about is also a recommended material for reading.
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