baseparse: provide default conversion using bps if no fps available
baseparse: provide default conversion using bps if no fps available

Also store estimated duration as such, rather than pretending otherwise
(e.g. set by subclass).

Distrotech/gstreamer,Lachann/gstreamer,lubosz/gstreamer,justinjoy/gstreamer,collects/gstreamer,krichter722/gstreamer,krichter722/gstreamer,lovebug356/gstreamer,cfoch/gstreamer,jpxiong/gstreamer,cfoch/gstreamer,StreamUtils/gstreamer,Lachann/gstreamer,krichter722/gstreamer,Distrotech/gstreamer,mparis/gstreamer,magcius/gstreamer,centricular/gstreamer,surround-io/gstreamer,magcius/gstreamer,jpakkane/gstreamer,cablelabs/gstreamer,jpakkane/gstreamer,krieger-od/gstreamer,ahmedammar/platform_external_gst_gstreamer,cablelabs/gstreamer,drothlis/gstreamer,Distrotech/gstreamer,collects/gstreamer,cablelabs/gstreamer,mparis/gstreamer,shelsonjava/gstreamer,shelsonjava/gstreamer,krichter722/gstreamer,StreamUtils/gstreamer,cfoch/gstreamer,cfoch/gstreamer,surround-io/gstreamer,ensonic/gstreamer,StreamUtils/gstreamer,magcius/gstreamer,krieger-od/gstreamer,ylatuya/gstreamer,justinjoy/gstreamer,drothlis/gstreamer,mparis/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,shelsonjava/gstreamer,lovebug356/gstreamer,lubosz/gstreamer,collects/gstreamer,ahmedammar/platform_external_gst_gstreamer,justinjoy/gstreamer,ensonic/gstreamer,drothlis/gstreamer,collects/gstreamer,surround-io/gstreamer,centricular/gstreamer,shelsonjava/gstreamer,krichter722/gstreamer,lubosz/gstreamer,centricular/gstreamer,magcius/gstreamer,StreamUtils/gstreamer,drothlis/gstreamer,lubosz/gstreamer,drothlis/gstreamer,lovebug356/gstreamer,krieger-od/gstreamer,krieger-od/gstreamer,ylatuya/gstreamer,justinjoy/gstreamer,surround-io/gstreamer,Lachann/gstreamer,Lachann/gstreamer,ahmedammar/platform_external_gst_gstreamer,Distrotech/gstreamer,centricular/gstreamer,ylatuya/gstreamer,lubosz/gstreamer,jpxiong/gstreamer,jpakkane/gstreamer,ahmedammar/platform_external_gst_gstreamer,cablelabs/gstreamer,Lachann/gstreamer,ahmedammar/platform_external_gst_gstreamer,ylatuya/gstreamer,ensonic/gstreamer,shelsonjava/gstreamer,lovebug356/gstreamer,ensonic/gstreamer,krieger-od/gstreamer,jpakkane/gstreamer,Distrotech/gstreamer,jpxiong/gstreamer,mparis/gstreamer,jpxiong/gstreamer,mparis/gstreamer,magcius/gstreamer,jpakkane/gstreamer,centricular/gstreamer,ensonic/gstreamer,cfoch/gstreamer,ylatuya/gstreamer,collects/gstreamer,justinjoy/gstreamer,lovebug356/gstreamer,surround-io/gstreamer,cablelabs/gstreamer