Last I tested, Lossless was frequently larger than blu-ray source. So, no, I don't see advantage of that middle man. Just use source, the whole point of using lossy encode is to speed up encoding. That certainly won't happen with a lossless source, it's just as big image dimension wise and probably even larger in bitrate. If anything it will slow things down.
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Geforce GTX 260
Windows 7, 64bit, Core i7
MPC-HC, Foobar2000
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