新手，用了aWarpSharp(16,2,0.5,2) 之后人物轮廓线条变细了，大概是原来的三分之二到二分之一。看见网上高手们说nnedi可以，但是俺还不会用，请指教！或者aWarpSharp的哪种参数可以很好的保留线条粗细呢？
nnedi说明：
INFO:
NNEDI is an intra-field only deinterlacer. It takes in a frame, throws away one field, and
then interpolates the missing pixels using only information from the kept field. It has same
rate and double rate modes, and works with YUY2 and YV12 input. NNEDI can also be used to
enlarge images by powers of 2.
Syntax =>
nnedi(int field, bool dh, bool Y, bool U, bool V, int threads, int opt, string name)
PARAMETERS:
field -
Controls the mode of operation (double vs same rate) and which field is kept.
Possible settings:
-2 = double rate (alternates each frame), uses avisynth's internal parity value to start
-1 = same rate, uses avisynth's internal parity value
0 = same rate, keep bottom field
1 = same rate, keep top field
2 = double rate (alternates each frame), starts with bottom
3 = double rate (alternates each frame), starts with top
Default: -1 (int)
dh -
Doubles the height of the input. Each line of the input is copied to every other line
of the output and the missing lines are interpolated. If field=0, the input is
copied to the odd lines of the output. If field=1, the input is copied to the even
lines of the output. field must be set to either 0 or 1 when using dh=true.
Default: false (int)
Y, U, V -
These control whether or not the specified plane is processed. Set to true to
process or false to ignore.
Default: Y = true (bool)
U = true (bool)
V = true (bool)
threads -
Controls how many threads will be used for processing. If set to 0, threads will
be set equal to the number of detected processors.
Default: 0 (int)
opt -
Sets which cpu optimizations to use. Possible settings:
0 = auto detect
1 = use c routines
2 = use sse routines
Default: 0 (int)
