Function gstreamer_rtp_sys::gst_rtp_base_payload_allocate_output_buffer

pub unsafe extern "C" fn gst_rtp_base_payload_allocate_output_buffer(
    payload: *mut GstRTPBasePayload, 
    payload_len: c_uint, 
    pad_len: u8, 
    csrc_count: u8
) -> *mut GstBuffer

This is supported on crate feature v1_16 only.