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# highgui module. High Level GUI and Media

This section contains valuable tutorials about how to read/save your image/video files and how to use the built-in graphical user interface of the library.

- | Title: Adding a Trackbar to our applications! Compatibility: > OpenCV 2.0 Author: Ana Huamán We will learn how to add a Trackbar to our applications

- | Title: Video Input with OpenCV and similarity measurement Compatibility: > OpenCV 2.0 Author: Bernát Gábor You will learn how to read video streams, and how to calculate similarity values such as PSNR or SSIM.

- | Title: Creating a video with OpenCV Compatibility: > OpenCV 2.0 Author: Bernát Gábor Whenever you work with video feeds you may eventually want to save your image processing result in a form of a new video file. Here’s how to do it.

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