if gst discover can't get durration, use dv formula on filesize.
if gst discover can't get durration, use dv formula on filesize.

yoe/veyepar,yoe/veyepar,xfxf/veyepar,yoe/veyepar,xfxf/veyepar,CarlFK/veyepar,CarlFK/veyepar,CarlFK/veyepar,yoe/veyepar,xfxf/veyepar,CarlFK/veyepar,yoe/veyepar,CarlFK/veyepar,xfxf/veyepar,xfxf/veyepar