Function gstreamer_video_sys::gst_video_converter_new_with_pool

pub unsafe extern "C" fn gst_video_converter_new_with_pool(
    in_info: *const GstVideoInfo, 
    out_info: *const GstVideoInfo, 
    config: *mut GstStructure, 
    pool: *mut GstTaskPool
) -> *mut GstVideoConverter

This is supported on crate feature v1_20 only.