filmdint[=options]
Inverse telecine filter, similar to the pullup filter above. It
is designed to handle any pulldown pattern, including mixed soft
and hard telecine and limited support for movies that are slowed
down or sped up from their original framerate for TV. Only the
luma plane is used to find the frame breaks. If a field has no
match, it is deinterlaced with simple linear approximation. If
the source is MPEG-2, this must be the first filter to allow ac-
cess to the field-flags set by the MPEG-2 decoder. Depending on
the source MPEG, you may be fine ignoring this advice, as long
as you do not see lots of "Bottom-first field" warnings. With
no options it does normal inverse telecine, and should be used
together with mencoder -fps 30000/1001 -ofps 24000/1001. When
this filter is used with mplayer, it will result in an uneven
framerate during playback, but it is still generally better than
using pp=lb or no deinterlacing at all. Multiple options can be
specified separated by /.
crop=<w>:<h>:<x>:<y>
Just like the crop filter, but faster, and works on
mixed hard and soft telecined content as well as when y
is not a multiple of 4. If x or y would require crop-
ping fractional pixels from the chroma planes, the crop
area is extended. This usually means that x and y must
be even.
io=<ifps>:<ofps>
For each ifps input frames the filter will output ofps
frames. The ratio of ifps/ofps should match the
-fps/-ofps ratio. This could be used to filter movies
that are broadcast on TV at a frame rate different from
their original framerate.
luma_only=<n>
If n is nonzero, the chroma plane is copied unchanged.
This is useful for YV12 sampled TV, which discards one
of the chroma fields.
mmx2=<n>
On x86, if n=1, use MMX2 optimized functions, if n=2,
use 3DNow! optimized functions, otherwise, use plain C.
If this option is not specified, MMX2 and 3DNow! are au-
to-detected, use this option to override auto-detection.
fast=<n>
The larger n will speed up the filter at the expense of
accuracy. The default value is n=3. If n is odd, a
frame immediately following a frame marked with the RE-
PEAT_FIRST_FIELD MPEG flag is assumed to be progressive,
thus filter will not spend any time on soft-telecined
MPEG-2 content. This is the only effect of this flag if
MMX2 or 3DNow! is available. Without MMX2 and 3DNow, if
n=0 or 1, the same calculations will be used as with n=2
or 3. If n=2 or 3, the number of luma levels used to
find the frame breaks is reduced from 256 to 128, which
results in a faster filter without losing much accuracy.
If n=4 or 5, a faster, but much less accurate metric
will be used to find the frame breaks, which is more
likely to misdetect high vertical detail as interlaced
content.
verbose=<n>
If n is nonzero, print the detailed metrics for each
frame. Useful for debugging.
dint_thres=<n>
Deinterlace threshold. Used during de-interlacing of
unmatched frames. Larger value means less deinterlac-
ing, use n=256 to completely turn off deinterlacing.
Default is n=8.
comb_thres=<n>
Threshold for comparing a top and bottom fields. De-
faults to 128.
diff_thres=<n>
Threshold to detect temporal change of a field. Default
is 128.
sad_thres=<n>
Sum of Absolute Difference threshold, default is 64.
