If you are having video performance issues with EpocCam, please try the following steps:
1) One possibility is that your computer is not able to process the video in real-time. Try to use lower video resolution, for example switch from 1920x1080 to 640x480.
Also make sure you are not running any other CPU hungry applications at the same time. For 720p HD video a dual-core CPU is recommended.
2) Another possible reason of bad quality is caused by WiFi connection. Look at this article for more information on how to troubleshoot:
3) Make sure only one application is using EpocCam at a time. Remember to exit EpocCam Viewer before using EpocCam with other applications.