Very basic sketch of rendering YUV frames via Qt/OpenGL
YUV -- is a raw video file format. Sometimes you want to display it, for example when displaying decoded video stream data.
Here is a Proof-of-Concept sketch, demonstrating rendering of YUV frames (as follows from title). There were times, when DirectX or Vdpau could beat OpenGL, the old version of it, but rendering a simple frame (okay, with YUV 2 RGB conversion) doesn't feel like something, which requires third party libraries.
Since Qt supports modern OpenGL (and even OpenGL ES) with shaders and other fine stuff (starting with Qt 5.6 or so), you can obtain a well-behaving rendering widget, possible to be embedded in your widget app.
Cross-platform and maybe even portable (depends on the drivers/hardware support etc).
They are required for testing purposes. Google helpes. Here, for example, you can get some.