ROI

region of interest coding

This function can be used to improve the coding quality of key areas and improve the subjective visual experience when the bit rate is low.

Only one area of ​​interest is supported on the interface, and developers can try to create up to 8 areas of interest.

Like the "Superimposed Effects" page, you need to select the corresponding channel on the preview screen before setting parameters.

Enable: Enable or disable the ROI function

ABS QP: Enable or disable absolute QP, see the description of QP parameters below

QP: When absolute QP is turned on, the encoding QP of the selected area is constant QP; when absolute QP is turned off, the encoding QP of the selected area is the current QP + the set QP, so setting a negative number can improve the encoding quality of the selected area, and vice versa.

BG Framerate: -1 means that the frame rate of the part outside the selection area does not change; when it is greater than 0, it means that the background frame rate is the set value.

Note that the preview image is only used to assist in delineating the selection, and changes in encoding quality and frame rate will not be reflected in the preview image.