Hi David,
Post your complete work flow if you can. I’ve used Flip4Mac with DVCProHD and I know others who’ve used HDCAM source to produce 720p WMVHD files without issue. A few have reported blockiness on dissolves with HDV source. I can’t help but think it’s how WMV export handles heavily compressed HDV.
Charles have you tested Flip4Mac with HDV source?
My own recommendation would be to get out of HDV on import/capture. Upconvert to DVCProHD on import to get away from the heavily compressed HDV GOP structure. I suspect dissolves (as well as keys) will survive much better.
David, I’d like to see an HDV clip wrapped in mov (export from FCP as Quicktime Movie Self contained). If you email me I’ll give you FTP info. Streamclip (I use it also) may get you through this deadline but I’d like to examine the HDV issue closely.