Wowza Video can’t generate any output renditions that are of higher quality than what it receives from the video source, so prepare the highest quality source you can support at the encoder. The higher the resolution of the source video, the more output renditions Wowza Video makes available for your viewers.
Learn best practices for creating high-quality encoded source video for the Wowza Video
https://www.wowza.com/docs/how-to-encode-source-video-for-wowza-video
