pad: clarify docs
pad: clarify docs

cablelabs/gstreamer,cfoch/gstreamer,lovebug356/gstreamer,collects/gstreamer,krieger-od/gstreamer,centricular/gstreamer,cfoch/gstreamer,lubosz/gstreamer,cfoch/gstreamer,jpxiong/gstreamer,surround-io/gstreamer,cablelabs/gstreamer,jpakkane/gstreamer,lubosz/gstreamer,cablelabs/gstreamer,centricular/gstreamer,cablelabs/gstreamer,collects/gstreamer,justinjoy/gstreamer,mparis/gstreamer,shelsonjava/gstreamer,justinjoy/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,jpakkane/gstreamer,krichter722/gstreamer,Lachann/gstreamer,jpakkane/gstreamer,shelsonjava/gstreamer,ensonic/gstreamer,shelsonjava/gstreamer,mparis/gstreamer,shelsonjava/gstreamer,Lachann/gstreamer,krieger-od/gstreamer,mparis/gstreamer,surround-io/gstreamer,krieger-od/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,cablelabs/gstreamer,justinjoy/gstreamer,Lachann/gstreamer,Lachann/gstreamer,krichter722/gstreamer,lubosz/gstreamer,ensonic/gstreamer,cfoch/gstreamer,jpakkane/gstreamer,jpxiong/gstreamer,ensonic/gstreamer,lovebug356/gstreamer,jpakkane/gstreamer,justinjoy/gstreamer,collects/gstreamer,Lachann/gstreamer,shelsonjava/gstreamer,StreamUtils/gstreamer,surround-io/gstreamer,surround-io/gstreamer,centricular/gstreamer,mparis/gstreamer,lubosz/gstreamer,jpxiong/gstreamer,lubosz/gstreamer,jpxiong/gstreamer,cfoch/gstreamer,collects/gstreamer,krieger-od/gstreamer,StreamUtils/gstreamer,mparis/gstreamer,lovebug356/gstreamer,ensonic/gstreamer,StreamUtils/gstreamer,lovebug356/gstreamer,krichter722/gstreamer,krichter722/gstreamer,krieger-od/gstreamer,justinjoy/gstreamer,surround-io/gstreamer,collects/gstreamer,jpxiong/gstreamer,ensonic/gstreamer,lovebug356/gstreamer