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.
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.