You can change the video calling frame quality by setting the video chat frame quality preset.
Please check the relevant section of our documentation for the following SDKs:
iOS – Advanced | Video Calling | iOS SDK | QuickBlox
Android – Advanced | Video Calling | Android SDK | QuickBlox
JavaScript – Advanced | Video Calling | JavaScript SDK | QuickBlox
Feel free to check our official documentation for more information that will help you to integrate QuickBlox services into your applications / projects or contact our Support team by submitting a ticket if you have any other questions