CameraReformat emulates a nuke reformat node using a scanline renderer. Its purpose is to extract an equivalent focal length for reformatted plates on VFX shows when multiple cameras and pixel aspects are at play but rendering needs to be standardised to a working resolution.

CameraReformat.nk

set cut_paste_input [stack 0]
version 13.0 v1
BackdropNode {
 inputs 0
 name BackdropNode1
 tile_color 0x444444ff
 label "resize type need to match for both\nCameraReformat and VFXReformat nodes\n(eg width, height, fit, fill)\n\nResize type none & distort are not yet implemented\n\n<l style=\"background-color:Green;\">If you see green and yellow in output image - all is golden</l>\n\n<l style=\"background-color:Red;\">If you see red in the output image - something ain't right.</lp>"
 note_font_size 15
 note_font_color 0xffffffff
 selected true
 xpos -965
 ypos -486
 appearance Border
 border_width 5
 bdwidth 610
 bdheight 299
}
BackdropNode {
 inputs 0
 name BackdropNode2
 tile_color 0xff5f00ff
 label "CameraReformat v007"
 note_font_size 50
 note_font_color 0xffffffff
 selected true
 xpos -1308
 ypos -1005
 appearance Border
 border_width 5
 bdwidth 1076
 bdheight 906
}
CheckerBoard2 {
 inputs 0
 format "4448 3096 0 0 4448 3096 2 arri_LF_opengate_ana2.0"
 name native_resolution_checkerboard3
 selected true
 xpos -810
 ypos -825
}
Text2 {
 font_size_toolbar 100
 font_width_toolbar 100
 font_height_toolbar 100
 message "the dude\nabides"
 old_message {{116 104 101 32 100 117 100 101 10 97 98 105 100 101 115}
   }
 box {0 0 4448 3096}
 xjustify center
 yjustify center
 transforms {{0 2}
   }
 cursor_position 15
 font {{ Comic Sans MS : Regular : Supplemental/Comic Sans MS.ttf : 0 }}
 global_font_scale 8
 center {2224 1548}
 cursor_initialised true
 autofit_bbox false
 initial_cursor_position {{0 3096}
   }
 group_animations {{0} imported: 0 selected: items: "root transform/"}
 animation_layers {{1 11 2224 1548 0 0 1 1 0 0 0 0}
   }
 name Text2
 selected true
 xpos -810
 ypos -681
}
Dot {
 name dot2
 tile_color 0xffffffff
 label "native plate"
 note_font_size 25
 note_font_color 0xff00ff
 selected true
 xpos -776
 ypos -606
}
set N404c1800 [stack 0]
Transform {
 scale 0.55
 center {{width/2} {height/2}}
 name Transform1
 label "translate: \[value translate]\nscale: \[value scale]"
 selected true
 xpos -590
 ypos -618
}
Reformat {
 format "4132 2322 0 0 4132 2322 1 uhd7"
 resize height
 pbb true
 name VFXReformat1
 label "resize: \[value resize]"
 selected true
 xpos -590
 ypos -301
}
set N404c1000 [stack 0]
push $cut_paste_input
Camera2 {
 focal 24
 haperture 36.7
 vaperture 25.54
 name natve_res_tracked_camera
 selected true
 xpos -1130
 ypos -366
}
push $N404c1000
push $N404c1800
Group {
 inputs 3
 name CameraReformat2
 tile_color 0x1fff00ff
 label "resize: \[value resize]"
 selected true
 xpos -810
 ypos -258
 addUserKnob {20 User}
 addUserKnob {26 spacer_1 l "" +STARTLINE T " "}
 addUserKnob {26 title_2d_reformat l "Native to VFX Transforms"}
 addUserKnob {26 spacer_2 l "" +STARTLINE T " "}
 addUserKnob {12 translate t "filmback pan\nnot yet implemented" +DISABLED}
 translate {{parent.Transform1.translate} {parent.Transform1.translate}}
 addUserKnob {12 translate2 -STARTLINE +INVISIBLE}
 translate2 {{translate} {translate}}
 addUserKnob {14 scale R 0 100}
 scale {{parent.Transform1.scale}}
 addUserKnob {14 scale2 -STARTLINE +INVISIBLE R 0 100}
 scale2 {{"resize==5?scale:\nresize==4?output_image_aspect>input_image_aspect?output_image_aspect/input_image_aspect*scale:scale:\nresize==3?output_image_aspect<input_image_aspect?output_image_aspect/input_image_aspect*scale:scale:\nresize==2?scale:\nresize==1?output_image_aspect/input_image_aspect*scale:\ninput_image_aspect/output_image_aspect*scale"}}
 addUserKnob {30 center l "scale center"}
 center {{parent.Transform1.center/Transform1.width} {parent.Transform1.center/parent.Transform1.height}}
 addUserKnob {30 center2 -STARTLINE +INVISIBLE}
 center2 {{center} {center}}
 addUserKnob {4 resize l "resize native to vfx" t "resize types none & distort not implemented" M {none width height fit fill distort "" "" "" "" "" "" "" ""}}
 resize height
 addUserKnob {4 transform_order l "transform order" t "transform order\nnot yet implemented" +DISABLED M {"translate, scale, resize" "translate, resize, scale" "scale, translate, resize" "scale, resize, translate" "resize, translate, scale" "resize, scale, translate" ""}}
 addUserKnob {26 spacer_3 l "" +STARTLINE T " \n "}
 addUserKnob {26 title_cam_output l "Camera Output Options"}
 addUserKnob {26 spacer_4 l "" +STARTLINE T " "}
 addUserKnob {4 scale_type l "scale type" M {"scaled focal length, original filmback width" "scaled focal length (pixel aspect), new filmback" "scaled focal length (image aspect), new filmback" "original focal length, new filmback" "" "" "" "" "" "" "" "" "" "" "" ""}}
 scale_type "scaled focal length (pixel aspect), new filmback"
 addUserKnob {4 filmback_math l "filmback math" t "filmback math\nunimplmeneted\nfit to horizonatal aperture assumed for input and output cameras" +DISABLED M {"horizontal aperture" "vertical aperture" "" ""}}
 addUserKnob {4 output M {"scanline renderer - vfx resolution" "scanline renderer - native resolution" "vfx camera" "" "" "" "" "" "" "" "" "" ""}}
 addUserKnob {26 spacer_5 l "" +STARTLINE T " \n "}
 addUserKnob {26 div_scale l "VFX Camera"}
 addUserKnob {26 spacer_6 l "" +STARTLINE T " "}
 addUserKnob {7 output_focal_scaled l "VFX focal"}
 output_focal_scaled {{"scale_type==3?output_focal_scaled3:\nscale_type==2?output_focal_scaled2:\nscale_type==1?output_focal_scaled1:\noutput_focal_scaled0"}}
 addUserKnob {12 output_filmback_scaled l "VFX filmback"}
 output_filmback_scaled {{"scale_type==3?output_filmback_scaled3:\nscale_type==2?output_filmback_scaled2:\nscale_type==1?output_filmback_scaled1:\noutput_filmback_scaled0"} {"scale_type==3?output_filmback_scaled3:\nscale_type==2?output_filmback_scaled2:\nscale_type==1?output_filmback_scaled1:\noutput_filmback_scaled0"}}
 addUserKnob {20 group l "scaled focal length, original filmback" +INVISIBLE n 1}
 addUserKnob {7 output_focal_scaled0 l "VFX focal"}
 output_focal_scaled0 {{input_focal*(input_image_aspect/output_image_aspect)*scale2}}
 addUserKnob {12 output_filmback_scaled0 l "VFX filmback"}
 output_filmback_scaled0 {{input_filmback.0} {input_filmback.0/output_image_aspect}}
 addUserKnob {7 output_filmback_aspect0 -STARTLINE}
 output_filmback_aspect0 {{output_filmback_scaled0.0/output_filmback_scaled0.1}}
 addUserKnob {20 endGroup n -1}
 addUserKnob {20 group_1 l "scaled focal length (input pixel aspect / output pixel aspect), new filmback" +INVISIBLE n 1}
 addUserKnob {7 output_focal_scaled1 l "VFX focal"}
 output_focal_scaled1 {{output_focal}}
 addUserKnob {12 output_filmback_scaled1 l "VFX filmback"}
 output_filmback_scaled1 {{output_filmback.0*1/scale2} {output_filmback.1*1/scale2}}
 addUserKnob {7 output_filmback_aspect1 -STARTLINE}
 output_filmback_aspect1 {{output_filmback_scaled1.0/output_filmback_scaled1.1}}
 addUserKnob {20 endGroup_1 l endGroup n -1}
 addUserKnob {20 group_2 l "scaled focal length (input image aspect / output image aspect), new filmback" +INVISIBLE n 1}
 addUserKnob {7 output_focal_scaled2 l "VFX focal"}
 output_focal_scaled2 {{input_focal*(input_image_aspect/output_image_aspect)}}
 addUserKnob {12 output_filmback_scaled2 l "VFX filmback"}
 output_filmback_scaled2 {{input_filmback.0/scale2} {output_filmback_scaled2.0/output_image_aspect}}
 addUserKnob {7 output_filmback_aspect2 -STARTLINE}
 output_filmback_aspect2 {{output_filmback_scaled2.0/output_filmback_scaled2.1}}
 addUserKnob {20 endGroup_2 l endGroup n -1}
 addUserKnob {20 group_3 l "original focal length, new filmback" +INVISIBLE n 1}
 addUserKnob {7 output_focal_scaled3 l "VFX focal"}
 output_focal_scaled3 {{input_focal}}
 addUserKnob {12 output_filmback_scaled3 l "VFX filmback"}
 output_filmback_scaled3 {{input_filmback.0/((input_image_aspect/output_image_aspect)*scale2)} {output_filmback_scaled3.0/output_image_aspect}}
 addUserKnob {7 output_filmback_aspect3 -STARTLINE}
 output_filmback_aspect3 {{output_filmback_scaled3.0/output_filmback_scaled3.1}}
 addUserKnob {20 endGroup_3 l endGroup n -1}
 addUserKnob {26 ""}
 addUserKnob {26 info l "" +STARTLINE T "CameraReformat\n\nConvert camera information from native plates to VFX plate pulls.\n\nv007 @darkness"}
 addUserKnob {20 input_calc l "Input Calculations"}
 addUserKnob {12 input_res l "image resolution"}
 input_res {{native_res.width} {native_res.height}}
 addUserKnob {7 input_pixel_aspect l "pixel aspect" -STARTLINE}
 input_pixel_aspect {{native_res.pixel_aspect}}
 addUserKnob {7 input_image_hypot l "image spherical hypot"}
 input_image_hypot {{"hypot(input_res.0*input_pixel_aspect, input_res.1)"}}
 addUserKnob {7 input_image_aspect l "image aspect"}
 input_image_aspect {{input_res.0*input_pixel_aspect/input_res.1}}
 addUserKnob {12 input_filmback l filmback}
 input_filmback {{input2.haperture} {input2.vaperture}}
 addUserKnob {7 input_filmback_aspect l "filmback aspect"}
 input_filmback_aspect {{input_filmback.0/input_filmback.1}}
 addUserKnob {7 input_focal l focal}
 input_focal {{input2.focal}}
 addUserKnob {20 output_calc l "Output Calculations"}
 addUserKnob {12 output_res l "image resolution" R 4 300}
 output_res {{vfx_format.width} {vfx_format.height}}
 addUserKnob {7 output_pixel_aspect l "pixel aspect" -STARTLINE}
 output_pixel_aspect {{vfx_format.pixel_aspect}}
 addUserKnob {7 output_image_hypot l "image spherical hypot"}
 output_image_hypot {{hypot(output_res.0*output_pixel_aspect,output_res.1)}}
 addUserKnob {7 output_image_aspect l "image aspect"}
 output_image_aspect {{output_res.0*output_pixel_aspect/output_res.1}}
 addUserKnob {12 output_filmback l filmback}
 output_filmback {{input_filmback.0*output_image_aspect/input_filmback_aspect} {input_filmback.1}}
 addUserKnob {7 output_filmback_aspect l "filmback aspect"}
 output_filmback_aspect {{output_filmback.0/(output_filmback.1/output_pixel_aspect)}}
 addUserKnob {7 output_focal l focal}
 output_focal {{input_focal*input_pixel_aspect/output_pixel_aspect}}
}
 BackdropNode {
  inputs 0
  name BackdropNode1
  tile_color 0x222222ff
  label "transform order - not implemented"
  note_font_size 42
  xpos 2939
  ypos -1817
  bdwidth 2124
  bdheight 1232
 }
 BackdropNode {
  inputs 0
  name BackdropNode2
  tile_color 0x8e0008ff
  label "native camera"
  note_font_size 42
  xpos -898
  ypos -2309
  bdwidth 373
  bdheight 239
 }
 BackdropNode {
  inputs 0
  name BackdropNode3
  tile_color 0x8e0008ff
  label "vfx camera"
  note_font_size 42
  xpos -894
  ypos -561
  bdwidth 373
  bdheight 239
 }
 Input {
  inputs 0
  name native_camera
  xpos -749
  ypos -2172
  number 2
 }
 Dot {
  name Dot10
  tile_color 0xffffffff
  note_font_size 50
  note_font_color 0xff00ff
  xpos -715
  ypos -1062
 }
set N61519c00 [stack 0]
 Dot {
  name Dot9
  tile_color 0xffffffff
  note_font_size 50
  note_font_color 0xff00ff
  xpos -715
  ypos -774
 }
set N6177c800 [stack 0]
 Camera2 {
  focal {{parent.output_focal_scaled}}
  haperture {{parent.output_filmback_scaled.0}}
  vaperture {{parent.output_filmback_scaled.1}}
  name VFXCamera3
  label "resize width\nscale focal"
  xpos -739
  ypos -462
 }
 Dot {
  name Dot1
  tile_color 0xffffffff
  note_font_size 50
  note_font_color 0xff00ff
  xpos -715
  ypos -78
 }
set N616f3c00 [stack 0]
 Dot {
  name Dot11
  tile_color 0xffffffff
  note_font_size 50
  note_font_color 0xff00ff
  xpos -715
  ypos 186
 }
set N616f3800 [stack 0]
 Dot {
  name Dot2
  tile_color 0xffffffff
  note_font_size 50
  note_font_color 0xff00ff
  xpos -715
  ypos 1242
 }
push $N61519c00
 Dot {
  name Dot7
  tile_color 0xffffffff
  note_font_size 50
  note_font_color 0xff00ff
  xpos 1314
  ypos -1062
 }
 Dot {
  name Dot20
  tile_color 0xffffffff
  note_font_size 50
  note_font_color 0xff00ff
  xpos 1314
  ypos 306
 }
push $N616f3800
push $N616f3c00
 Input {
  inputs 0
  name vfx_format
  xpos 840
  ypos -2172
  number 1
 }
 Crop {
  box {0 0 {width} {height}}
  name Crop2
  xpos 840
  ypos -2111
 }
 Multiply {
  channels {rgba.red -rgba.green rgba.blue none}
  value 0
  name Multiply2
  xpos 840
  ypos -2027
 }
 Grade {
  add {0 0.02 0 0}
  add_panelDropped true
  name Grade1
  xpos 840
  ypos -1952
 }
 Dot {
  name Dot12
  tile_color 0xffffffff
  note_font_size 50
  note_font_color 0xff00ff
  xpos 874
  ypos -1687
 }
set N616f2c00 [stack 0]
 Dot {
  name Dot8
  tile_color 0xffffffff
  note_font_size 50
  note_font_color 0xff00ff
  xpos 874
  ypos -78
 }
set N616f2800 [stack 0]
 Project3D2 {
  inputs 2
  name Project3D2
  xpos 290
  ypos -81
 }
push $N6177c800
 Input {
  inputs 0
  name native_format
  xpos -40
  ypos -2172
 }
 Dot {
  name Dot4
  tile_color 0xffffffff
  note_font_size 50
  note_font_color 0xff00ff
  xpos -6
  ypos -1327
 }
set N616f1800 [stack 0]
 Multiply {
  channels {-rgba.red rgba.green rgba.blue none}
  value 0
  name Multiply3
  xpos -40
  ypos -954
 }
 Project3D2 {
  inputs 2
  name Project3D1
  xpos -40
  ypos -777
 }
 MergeMat {
  inputs 2
  channels {-rgba.red rgba.green -rgba.blue -rgba.alpha}
  operation plus
  name MergeMat1
  xpos -40
  ypos -253
 }
set N616f0c00 [stack 0]
 Card2 {
  lens_in_focal {{input2.focal}}
  lens_in_haperture {{input2.haperture}}
  translate {0 0 -1}
  uniform_scale {{parent.input_image_hypot/parent.output_image_hypot}}
  control_points {3 3 3 6 

1 {-0.5 -0.5 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {0 0 0} 
1 {0 -0.5 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {0.5 0 0} 
1 {0.5 -0.5 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {1 0 0} 
1 {-0.5 0 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {0 0.5 0} 
1 {0 0 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {0.5 0.5 0} 
1 {0.5 0 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {1 0.5 0} 
1 {-0.5 0.5 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {0 1 0} 
1 {0 0.5 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {0.5 1 0} 
1 {0.5 0.5 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {1 1 0} }
  name Card1
  xpos -40
  ypos 39
 }
 TransformGeo {
  inputs 2
  selectable false
  name TransformGeo1
  xpos -40
  ypos 183
 }
set N616f0400 [stack 0]
 Dot {
  name Dot21
  tile_color 0xffffffff
  note_font_size 50
  note_font_color 0xff00ff
  xpos 1644
  ypos 186
 }
push $N616f1800
 Dot {
  name native_res
  tile_color 0xffffffff
  label "native res"
  note_font_size 25
  note_font_color 0xff00ff
  xpos 2524
  ypos -1327
 }
 Dot {
  name Dot5
  tile_color 0xffffffff
  note_font_size 50
  note_font_color 0xff00ff
  xpos 2524
  ypos 306
 }
 Multiply {
  value 0
  name Multiply4
  xpos 1940
  ypos 299
 }
 Crop {
  box {0 0 {width} {height}}
  name Crop3
  xpos 1830
  ypos 303
 }
 ScanlineRender {
  inputs 3
  conservative_shader_sampling false
  motion_vectors_type distance
  name ScanlineRender2
  xpos 1610
  ypos 303
 }
 Dot {
  name Dot6
  tile_color 0xffffffff
  note_font_size 50
  note_font_color 0xff00ff
  xpos 1644
  ypos 1242
 }
push $N616f3800
push $N616f0400
push $N616f2800
 Dot {
  name Dot3
  tile_color 0xffffffff
  note_font_size 50
  note_font_color 0xff00ff
  xpos 874
  ypos 306
 }
 Multiply {
  value 0
  name Multiply1
  xpos 290
  ypos 299
 }
 Crop {
  box {0 0 {width} {height}}
  name Crop1
  xpos 180
  ypos 303
 }
 ScanlineRender {
  inputs 3
  conservative_shader_sampling false
  overscan {0 0}
  motion_vectors_type distance
  name ScanlineRender1
  xpos -40
  ypos 303
 }
 Switch {
  inputs 3
  which {{parent.output}}
  name Switch4
  xpos -40
  ypos 1239
 }
 Output {
  name Output1
  xpos -40
  ypos 1623
 }
push $N616f2c00
 Dot {
  name vfx_res
  tile_color 0xffffffff
  label "vfx res"
  note_font_size 25
  note_font_color 0xff00ff
  xpos 3184
  ypos -1687
 }
set N61690c00 [stack 0]
 Position {
  translate {{-parent.translate} {-parent.translate}}
  name invertTranslate
  xpos 4800
  ypos -1330
 }
 set C61690800 [stack 0]
 Transform {
  scale {{1/parent.scale}}
  center {{width*parent.center} {height*parent.center}}
  invert_matrix true
  name invertScale5
  tile_color 0xaaff55ff
  xpos 4800
  ypos -1258
 }
 set C61690400 [stack 0]
 Reformat {
  type "to box"
  box_width {{native_res.width}}
  box_height {{native_res.height}}
  box_fixed true
  box_pixel_aspect {{native_res.pixel_aspect}}
  resize height
  name invertResize
  xpos 4800
  ypos -1186
 }
 Dot {
  name Dot18
  tile_color 0xffffffff
  label "resize, scale, translate"
  note_font_size 20
  note_font_color 0xff00ff
  xpos 4834
  ypos -1087
 }
push $N61690c00
clone $C61690400 {
  xpos 4470
  ypos -1330
  selected false
 }
clone $C61690800 {
  xpos 4470
  ypos -1258
  selected false
 }
 Reformat {
  type "to box"
  box_width {{native_res.width}}
  box_height {{native_res.height}}
  box_fixed true
  box_pixel_aspect {{native_res.pixel_aspect}}
  resize {{parent.resize}}
  name invertResize1
  xpos 4470
  ypos -1186
 }
 set C6162e800 [stack 0]
 Dot {
  name Dot16
  tile_color 0xffffffff
  label "resize, translate, scale"
  note_font_size 20
  note_font_color 0xff00ff
  xpos 4504
  ypos -1087
 }
push $N61690c00
clone $C61690800 {
  xpos 4140
  ypos -1330
  selected false
 }
clone $C6162e800 {
  xpos 4140
  ypos -1258
  selected false
 }
clone $C61690400 {
  xpos 4140
  ypos -1186
  selected false
 }
 Dot {
  name Dot14
  tile_color 0xffffffff
  label "scale, resize, translate"
  note_font_size 20
  note_font_color 0xff00ff
  xpos 4174
  ypos -1087
 }
push $N61690c00
clone $C6162e800 {
  xpos 3810
  ypos -1330
  selected false
 }
clone $C61690800 {
  xpos 3810
  ypos -1258
  selected false
 }
clone $C61690400 {
  xpos 3810
  ypos -1186
  selected false
 }
 Dot {
  name Dot13
  tile_color 0xffffffff
  label "scale, translate, resize"
  note_font_size 20
  note_font_color 0xff00ff
  xpos 3844
  ypos -1087
 }
push $N61690c00
clone $C61690400 {
  xpos 3480
  ypos -1330
  selected false
 }
clone $C6162e800 {
  xpos 3480
  ypos -1258
  selected false
 }
clone $C61690800 {
  xpos 3480
  ypos -1186
  selected false
 }
 Dot {
  name Dot17
  tile_color 0xffffffff
  label "translate, resize, scale"
  note_font_size 20
  note_font_color 0xff00ff
  xpos 3514
  ypos -1087
 }
push $N61690c00
clone $C6162e800 {
  xpos 3150
  ypos -1330
  selected false
 }
clone $C61690400 {
  xpos 3150
  ypos -1258
  selected false
 }
clone $C61690800 {
  xpos 3150
  ypos -1186
  selected false
 }
 Dot {
  name Dot15
  tile_color 0xffffffff
  label "translate, scale, resize"
  note_font_size 20
  note_font_color 0xff00ff
  xpos 3184
  ypos -1087
 }
 Switch {
  inputs 6
  which {{parent.transform_order}}
  name Switch11
  xpos 3150
  ypos -778
 }
 Dot {
  name Dot19
  tile_color 0xffffffff
  label "vfx to native"
  note_font_size 20
  note_font_color 0xff00ff
  xpos 3184
  ypos -703
 }
push $N616f0c00
 Viewer {
  frame_range 1-100
  colour_sample_bbox {0.3484995067 -0.2250726074 0.5721200109 -0.07696031034}
  name Viewer1
  selected true
  xpos -40
  ypos -930
 }
end_group
Viewer {
 inputs 2
 frame_range 1-100
 name Viewer1
 selected true
 xpos -810
 ypos 43
}