gst-launch: Update for GstContext changes
gst-launch: Update for GstContext changes

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