Was concerned at the agreement at the beginning dealing with Somoto. Going with another Codec pack.
"SOMOTO provides a software pack (the "Filebulldog Pack" or "Pack") that enables partners (as defined below) to distribute it browser toolbar. The Filebulldog Pack is available after authorization is granted from SOMOTO that can be contacted at firstname.lastname@example.org ."
1. LAV Filters work better than ffdshow. Quality is same or better.
2. Deinterlacing is done by either the video decoder or video renderer. DirectVobSub is not able to forward interlacing flags to the renderer. So you have to enable deinterlacing in the decoder. LAV Video decoder offers YaDif option for that.