mvsfunc-r8
New Main function VFRSplice()
Preview: Set default dither to "random" to avoid banding
Depth, ToRGB, ToYUV, BM3D: When sample conversion is required but 'depth' is not set, use 16-bit for integer and 32-bit for float
LimitFilter: fixed error when thr>0&brighten_thr<=0 or thr<=0&brighten_thr>0
LimitFilter: fixed brighten_thr is not used when elast<=1
Frame properties related fixes