buffer: improve docs
buffer: improve docs

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