Media Viewer

The Media Viewer is a hybrid application designed to visualize image files and play back video files seamlessly from the Virtual Filesystem.

Core Features

• Automatic media switching based on file extensions.
• Support for image displaying (Textures).
• Support for video playback (Media Player & Media Texture).

Architecture & Dependencies

The UMediaViewerApp controller acts as a bridge.

• It relies on UVirtualFilesystemSubsystem to resolve the actual disk path of media assets if they are referenced by VFS virtual paths.
• The heavy lifting is done within the UMG widget (MediaViewerWidgetClass), which uses Unreal's UMediaPlayer to render video content, responding to the OnMediaLoaded(const FString& VFSPath) event fired by the C++ controller.

Technical Details

• Controller Class: UMediaViewerApp (Inherits from UAppBase)
• View Target: User must assign a UMG Widget to MediaViewerWidgetClass.
• Window Specs:
  • Initial Size: 800x600
  • Resizable: true
  • Maximizable: true
• Key Methods:
  • OpenMedia(const FString& VFSPath): Instructs the app to load and display the requested media.
  • GetCurrentMediaPath(): Returns the currently opened virtual file.
• Key Events:
  • OnMediaLoaded: A Blueprint Implementable Event that the UMG widget must hook into to actually mount the texture or start the media player stream.