videoconvert, deinterlace: need to handle the new DMABuf caps feature
With the new DMABuf capsfeature some elements cannot negotiate them as expected so they need to be updated. The current identified are videoconvert and deinterlace, because they are use by playbin and right now, pipelines that negotiate DMABuf capsfeatures will fail to link (see attached image), whilst using playbin3, raw video is negotiated by default.
Perhaps another option would be to adopt autoconvert in playbins.
cc: @slomo, @ndufresne, @He_Junyan, @nirbheek