license: GPL
FieldDiff is a simple filter that calculates a field difference metric using the 5 point metric that TFM uses and then outputs it via the debug or display options. It operates on full frames (it differences the two fields in each frame). FieldDiff has a version that can be used in conditional filtering called "CFieldDiff" it returns the value to the script.
FieldDiff (clip, int "nt", bool "chroma", bool "display", bool "debug")CFieldDiff (clip, int "nt", bool "chroma", bool "debug")
This is a script where TFM's hints would normally be destroyed and never reach TDecimate:
mpeg2source(d2v="source.d2v") tfm(d2v="source.d2v") temporalsoften(3, 3, 5, 15, 2) #destroys the hints blur(0.25) #destroys the hints tdecimate(mode=1)
To fix this, and preserve the hints (they can greatly aid decimation, especially if using hybrid detection), use MergeHints as follows:
mpeg2source(d2v="source.d2v") tfm(d2v="source.d2v") savedHints = last temporalsoften(3, 3, 5, 15, 2) blur(0.25) MergeHints(hintClip=savedHints) tdecimate(mode=1)
nt -
Sets the noise threshold for the field differencing. Recommended values are between 0 (no noise rejection) and 5.
Default: 3 (int)
chroma -
Disables or enables chroma processing.
Default: true (bool)
display -
Draws the difference value on the top left of each frame.
Default: false (bool)
debug -
Outputs the difference value via OutputDebugString. Use "DebugView" to
view the output.
Default: false (bool)
$Date: 2005/07/10 16:11:01 $