Epson Moverio Pro BT-2000 Developer's Manual page 86

Use procedure 2 (when preview has already started)
/*Stop preview*/
camera.stopPreview();
/*Acquire current parameter (or default value)*/
Camera.Parameters params = camera.getParameters();
/*From here on, use procedure 1*/
Remarks

After setting the frame rate in setPreviewFpsRange, be sure to perform

setParameters. Changed content is not reflected in the camera device until
setParameters is executed.
When the preview has already started, use stopPreview to temporarily stop the

preview.
Each frame rate has a limited combination of preview resolutions and camera

modes. Note that a run-time exception will occur in setParameters for
combinations that exceed the limit.
MOVERIO Pro Developer's Guide (Rev.1.4)
80