buffer: add clip flag
buffer: add clip flag

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