Associate a camera to a given video group
#include <camera/camera_api.h>
camera_error_t camera_add_video_group_entry(camera_video_group_id_t group_id,
camera_handle_t handle)
This function registers the camera handle of a camera with a video group that was created using camera_create_video_group(). After the camera is registered, it becomes associated with the video group and camera_start_video() or camera_start_encode() no longer start video encoding right away. Instead, the video encoding waits until a call to camera_start_video_group(), which permits all cameras that are associated with a video group to start recording or encoding video at the same time.
CAMERA_EOK when the function successfully completes, otherwise another camera_error_t value that provides the reason that the call failed.