fisheye removel for 4:3 max superview

README.md

@@ -2,10 +2,12 @@
 
 Shaders for Avidemux with OpenGL support
 
-## gopro_8:7 - Fisheye removal for GoPro 11+, 8:7 ratio, 60fps, HyperSmooth off
+## GoPro fisheye removal
 
 ![Sample image](https://blog.rozk.net/wp-content/uploads/2025/07/compare.png)
 
+### gopro_8:7 - Fisheye removal for GoPro 11+, 8:7 ratio, 60fps, HyperSmooth off
+
 - unfish_gopro_8:7.glsl  
 Shader for fisheye removal
 
@@ -21,24 +23,41 @@ Preset for mp4, FullHD, constant bitrate
 - preset_gopro_8:7_HD_720p.py  
 Preset for mp4, HD, constant bitrate
 
-- preset_gopro_8:7_QHD_540p.py  
-Preset for mp4, QHD, constant bitrate
-
 - compute_gopro_8:7.py  
 Script to compute output FOV and frame widening
 
+### gopro_4:3_maxlens - Fisheye removal for GoPro 11+, 4:3 ratio, Max SuperView, 60fps, HyperSmooth off
+
+- unfish_gopro_4:3_maxlens.glsl  
+Shader for fisheye removal
+
+- preset_gopro_4:3_maxlens_4K_youtube.py  
+Preset for mp4, 4K, high bitrate
+
+- preset_gopro_4:3_maxlens_4K_2160p.py  
+Preset for mp4, 4K, constant bitrate
+
+- preset_gopro_4:3_maxlens_FullHD_1080p.py  
+Preset for mp4, FullHD, constant bitrate
+
+- preset_gopro_4:3_maxlens_HD_720p.py  
+Preset for mp4, HD, constant bitrate
+
+- compute_gopro_4:3_maxlens.py  
+Script to compute output FOV and frame widening
+
 ### Installation for BSD/GNU-Linux systems:
 
 - Copy the presets to ~/.avidemux6/custom/
 - Copy the shader to /opt/rk/avidemux/ (or edit the preset to set the path)  
 
-Or just run the script install_gopro_8:7.sh
+Or just run the scripts install_gopro_8:7.sh and/or install_gopro_4:3_maxlens.sh
 
-_For commercial OS's, figure out the paths yourself, then edit the presets to fix the path to the .glsl file_
+_For commercial OS's, figure out the paths yourself, then edit the presets to fix the path to the .glsl files_
 
 ### Usage:
 
 - Load and edit video(s)
-- Select "Custom/preset_gopro_8:7_..." in the menu
+- Select "Custom/preset_gopro..." in the menu
 - Add filters
 - Save the video

gopro_4:3_maxlens/compute_gopro_4:3_maxlens.py

@@ -0,0 +1,36 @@
+# RozK
+# Computes fisheye removal parameters for GoPro 11+, 4:3 ratio, Max SuperView,
+# keeping the vertical FOV and widening the frame to preserve the diagonal FOV
+
+# https://www.bobatkins.com/photography/technical/field_of_view.html
+# https://community.gopro.com/s/article/HERO11-Black-Mini-Digital-Lenses-FOV-Information?language=fr
+
+import math
+
+frame_width = 4
+frame_height = 3
+input_ratio = frame_width / frame_height
+
+input_vertical_fov = 108.0
+input_diagonal_fov = 169.0
+
+input_vertical_length = math.radians(input_vertical_fov * 0.5)
+input_diagonal_length = math.radians(input_diagonal_fov * 0.5)
+
+output_horizontal_length = math.sqrt((input_diagonal_length ** 2) / (input_vertical_length ** 2))
+output_diagonal_length = math.hypot(output_horizontal_length, input_vertical_length)
+output_diagonal_fov = math.degrees(math.atan(output_diagonal_length)) * 2.0
+
+output_ratio = 1.0 / (output_horizontal_length / input_vertical_length)
+
+print("Output FOV   = %f" % output_diagonal_fov)
+print("Output Ratio = %f" % output_ratio)
+print("= Resolutions =====================")
+
+def width_rounded_8(height):
+    width = int(round(height * input_ratio))
+    return ((width + 4) // 8) * 8
+
+print("HD             = %i x 720" % width_rounded_8(720))
+print("Full HD        = %i x 1080" % width_rounded_8(1080))
+print("4K             = %i x 2160" % width_rounded_8(2160))

gopro_4:3_maxlens/preset_gopro_4:3_maxlens_4K_2160p.py

@@ -0,0 +1,116 @@
+#PY  <- Needed to identify #
+# RozK
+# Custom preset for GoPro, 4:3 ratio, Max SuperView, without hypersmooth, output widened scaled to 4K (2160p)
+
+adm = Avidemux()
+adm.videoCodec(
+    "x264",
+    "useAdvancedConfiguration=False",
+    "general.params=CBR=32768",
+    "general.threads=0",
+    "general.preset=slow",
+    "general.tuning=film",
+    "general.profile=high",
+    "general.fast_decode=False",
+    "general.zero_latency=False",
+    "general.fast_first_pass=True",
+    "general.blueray_compatibility=False",
+    "general.fake_interlaced=False",
+    "level=-1",
+    "vui.sar_height=1",
+    "vui.sar_width=1",
+    "vui.overscan=0",
+    "vui.vidformat=5",
+    "vui.fullrange=False",
+    "vui.colorprim=2",
+    "vui.transfer=2",
+    "vui.colmatrix=2",
+    "vui.chroma_loc=0",
+    "MaxRefFrames=3",
+    "MinIdr=25",
+    "MaxIdr=250",
+    "i_scenecut_threshold=40",
+    "intra_refresh=False",
+    "MaxBFrame=3",
+    "i_bframe_adaptive=1",
+    "i_bframe_bias=0",
+    "i_bframe_pyramid=2",
+    "b_deblocking_filter=True",
+    "i_deblocking_filter_alphac0=0",
+    "i_deblocking_filter_beta=0",
+    "cabac=True",
+    "interlaced=False",
+    "constrained_intra=False",
+    "tff=True",
+    "fake_interlaced=False",
+    "analyze.b_8x8=True",
+    "analyze.b_i4x4=True",
+    "analyze.b_i8x8=True",
+    "analyze.b_p8x8=True",
+    "analyze.b_p16x16=False",
+    "analyze.b_b16x16=False",
+    "analyze.weighted_pred=2",
+    "analyze.weighted_bipred=True",
+    "analyze.direct_mv_pred=1",
+    "analyze.chroma_offset=0",
+    "analyze.me_method=1",
+    "analyze.me_range=16",
+    "analyze.mv_range=-1",
+    "analyze.mv_range_thread=-1",
+    "analyze.subpel_refine=7",
+    "analyze.chroma_me=True",
+    "analyze.mixed_references=True",
+    "analyze.trellis=1",
+    "analyze.psy_rd=1.000000",
+    "analyze.psy_trellis=0.000000",
+    "analyze.fast_pskip=True",
+    "analyze.dct_decimate=True",
+    "analyze.noise_reduction=0",
+    "analyze.psy=True",
+    "analyze.intra_luma=11",
+    "analyze.inter_luma=21",
+    "ratecontrol.rc_method=0",
+    "ratecontrol.qp_constant=0",
+    "ratecontrol.qp_min=10",
+    "ratecontrol.qp_max=51",
+    "ratecontrol.qp_step=4",
+    "ratecontrol.bitrate=0",
+    "ratecontrol.rate_tolerance=1.000000",
+    "ratecontrol.vbv_max_bitrate=0",
+    "ratecontrol.vbv_buffer_size=0",
+    "ratecontrol.vbv_buffer_init=1",
+    "ratecontrol.ip_factor=1.400000",
+    "ratecontrol.pb_factor=1.300000",
+    "ratecontrol.aq_mode=1",
+    "ratecontrol.aq_strength=1.000000",
+    "ratecontrol.mb_tree=True",
+    "ratecontrol.lookahead=40")
+adm.clearVideoFilters()
+adm.addVideoFilter(
+    "shaderLoader",
+    "shaderFile=/opt/rk/avidemux/unfish_gopro_4:3_maxlens.glsl")
+adm.addVideoFilter(
+    "swscale",
+    "width=2880",
+    "height=2160",
+    "algo=1",
+    "sourceAR=0",
+    "targetAR=0",
+    "lockAR=False",
+    "roundup=2")
+adm.addVideoFilter(
+    "MplayerDenoise3DHQ",
+    "mode=4",
+    "luma_spatial=4.000000",
+    "chroma_spatial=3.000000",
+    "luma_temporal=6.000000",
+    "chroma_temporal=4.500000")
+adm.setContainer(
+    "MP4",
+    "muxerType=0",
+    "optimize=1",
+    "forceAspectRatio=False",
+    "aspectRatio=1",
+    "displayWidth=1280",
+    "rotation=0",
+    "clockfreq=0")

gopro_4:3_maxlens/preset_gopro_4:3_maxlens_4K_youtube.py

@@ -0,0 +1,116 @@
+#PY  <- Needed to identify #
+# RozK
+# Custom preset for GoPro, 4:3 ratio, Max SuperView, without hypersmooth, output widened scaled to 4K (2160p), high bitrate
+
+adm = Avidemux()
+adm.videoCodec(
+    "x264",
+    "useAdvancedConfiguration=False",
+    "general.params=CBR=65536",
+    "general.threads=0",
+    "general.preset=slow",
+    "general.tuning=film",
+    "general.profile=high",
+    "general.fast_decode=False",
+    "general.zero_latency=False",
+    "general.fast_first_pass=True",
+    "general.blueray_compatibility=False",
+    "general.fake_interlaced=False",
+    "level=-1",
+    "vui.sar_height=1",
+    "vui.sar_width=1",
+    "vui.overscan=0",
+    "vui.vidformat=5",
+    "vui.fullrange=False",
+    "vui.colorprim=2",
+    "vui.transfer=2",
+    "vui.colmatrix=2",
+    "vui.chroma_loc=0",
+    "MaxRefFrames=3",
+    "MinIdr=25",
+    "MaxIdr=250",
+    "i_scenecut_threshold=40",
+    "intra_refresh=False",
+    "MaxBFrame=3",
+    "i_bframe_adaptive=1",
+    "i_bframe_bias=0",
+    "i_bframe_pyramid=2",
+    "b_deblocking_filter=True",
+    "i_deblocking_filter_alphac0=0",
+    "i_deblocking_filter_beta=0",
+    "cabac=True",
+    "interlaced=False",
+    "constrained_intra=False",
+    "tff=True",
+    "fake_interlaced=False",
+    "analyze.b_8x8=True",
+    "analyze.b_i4x4=True",
+    "analyze.b_i8x8=True",
+    "analyze.b_p8x8=True",
+    "analyze.b_p16x16=False",
+    "analyze.b_b16x16=False",
+    "analyze.weighted_pred=2",
+    "analyze.weighted_bipred=True",
+    "analyze.direct_mv_pred=1",
+    "analyze.chroma_offset=0",
+    "analyze.me_method=1",
+    "analyze.me_range=16",
+    "analyze.mv_range=-1",
+    "analyze.mv_range_thread=-1",
+    "analyze.subpel_refine=7",
+    "analyze.chroma_me=True",
+    "analyze.mixed_references=True",
+    "analyze.trellis=1",
+    "analyze.psy_rd=1.000000",
+    "analyze.psy_trellis=0.000000",
+    "analyze.fast_pskip=True",
+    "analyze.dct_decimate=True",
+    "analyze.noise_reduction=0",
+    "analyze.psy=True",
+    "analyze.intra_luma=11",
+    "analyze.inter_luma=21",
+    "ratecontrol.rc_method=0",
+    "ratecontrol.qp_constant=0",
+    "ratecontrol.qp_min=10",
+    "ratecontrol.qp_max=51",
+    "ratecontrol.qp_step=4",
+    "ratecontrol.bitrate=0",
+    "ratecontrol.rate_tolerance=1.000000",
+    "ratecontrol.vbv_max_bitrate=0",
+    "ratecontrol.vbv_buffer_size=0",
+    "ratecontrol.vbv_buffer_init=1",
+    "ratecontrol.ip_factor=1.400000",
+    "ratecontrol.pb_factor=1.300000",
+    "ratecontrol.aq_mode=1",
+    "ratecontrol.aq_strength=1.000000",
+    "ratecontrol.mb_tree=True",
+    "ratecontrol.lookahead=40")
+adm.clearVideoFilters()
+adm.addVideoFilter(
+    "shaderLoader",
+    "shaderFile=/opt/rk/avidemux/unfish_gopro_4:3_maxlens.glsl")
+adm.addVideoFilter(
+    "swscale",
+    "width=2880",
+    "height=2160",
+    "algo=1",
+    "sourceAR=0",
+    "targetAR=0",
+    "lockAR=False",
+    "roundup=2")
+adm.addVideoFilter(
+    "MplayerDenoise3DHQ",
+    "mode=4",
+    "luma_spatial=4.000000",
+    "chroma_spatial=3.000000",
+    "luma_temporal=6.000000",
+    "chroma_temporal=4.500000")
+adm.setContainer(
+    "MP4",
+    "muxerType=0",
+    "optimize=1",
+    "forceAspectRatio=False",
+    "aspectRatio=1",
+    "displayWidth=1280",
+    "rotation=0",
+    "clockfreq=0")

gopro_4:3_maxlens/preset_gopro_4:3_maxlens_FullHD_1080p.py

@@ -0,0 +1,116 @@
+#PY  <- Needed to identify #
+# RozK
+# Custom preset for GoPro, 4:3 ratio, Max SuperView, without hypersmooth, output widened scaled to Full HD (1080p)
+
+adm = Avidemux()
+adm.videoCodec(
+    "x264",
+    "useAdvancedConfiguration=False",
+    "general.params=CBR=16384",
+    "general.threads=0",
+    "general.preset=slow",
+    "general.tuning=film",
+    "general.profile=high",
+    "general.fast_decode=False",
+    "general.zero_latency=False",
+    "general.fast_first_pass=True",
+    "general.blueray_compatibility=False",
+    "general.fake_interlaced=False",
+    "level=-1",
+    "vui.sar_height=1",
+    "vui.sar_width=1",
+    "vui.overscan=0",
+    "vui.vidformat=5",
+    "vui.fullrange=False",
+    "vui.colorprim=2",
+    "vui.transfer=2",
+    "vui.colmatrix=2",
+    "vui.chroma_loc=0",
+    "MaxRefFrames=3",
+    "MinIdr=25",
+    "MaxIdr=250",
+    "i_scenecut_threshold=40",
+    "intra_refresh=False",
+    "MaxBFrame=3",
+    "i_bframe_adaptive=1",
+    "i_bframe_bias=0",
+    "i_bframe_pyramid=2",
+    "b_deblocking_filter=True",
+    "i_deblocking_filter_alphac0=0",
+    "i_deblocking_filter_beta=0",
+    "cabac=True",
+    "interlaced=False",
+    "constrained_intra=False",
+    "tff=True",
+    "fake_interlaced=False",
+    "analyze.b_8x8=True",
+    "analyze.b_i4x4=True",
+    "analyze.b_i8x8=True",
+    "analyze.b_p8x8=True",
+    "analyze.b_p16x16=False",
+    "analyze.b_b16x16=False",
+    "analyze.weighted_pred=2",
+    "analyze.weighted_bipred=True",
+    "analyze.direct_mv_pred=1",
+    "analyze.chroma_offset=0",
+    "analyze.me_method=1",
+    "analyze.me_range=16",
+    "analyze.mv_range=-1",
+    "analyze.mv_range_thread=-1",
+    "analyze.subpel_refine=7",
+    "analyze.chroma_me=True",
+    "analyze.mixed_references=True",
+    "analyze.trellis=1",
+    "analyze.psy_rd=1.000000",
+    "analyze.psy_trellis=0.000000",
+    "analyze.fast_pskip=True",
+    "analyze.dct_decimate=True",
+    "analyze.noise_reduction=0",
+    "analyze.psy=True",
+    "analyze.intra_luma=11",
+    "analyze.inter_luma=21",
+    "ratecontrol.rc_method=0",
+    "ratecontrol.qp_constant=0",
+    "ratecontrol.qp_min=10",
+    "ratecontrol.qp_max=51",
+    "ratecontrol.qp_step=4",
+    "ratecontrol.bitrate=0",
+    "ratecontrol.rate_tolerance=1.000000",
+    "ratecontrol.vbv_max_bitrate=0",
+    "ratecontrol.vbv_buffer_size=0",
+    "ratecontrol.vbv_buffer_init=1",
+    "ratecontrol.ip_factor=1.400000",
+    "ratecontrol.pb_factor=1.300000",
+    "ratecontrol.aq_mode=1",
+    "ratecontrol.aq_strength=1.000000",
+    "ratecontrol.mb_tree=True",
+    "ratecontrol.lookahead=40")
+adm.clearVideoFilters()
+adm.addVideoFilter(
+    "shaderLoader",
+    "shaderFile=/opt/rk/avidemux/unfish_gopro_4:3_maxlens.glsl")
+adm.addVideoFilter(
+    "swscale",
+    "width=1440",
+    "height=1080",
+    "algo=1",
+    "sourceAR=0",
+    "targetAR=0",
+    "lockAR=False",
+    "roundup=2")
+adm.addVideoFilter(
+    "MplayerDenoise3DHQ",
+    "mode=4",
+    "luma_spatial=4.000000",
+    "chroma_spatial=3.000000",
+    "luma_temporal=6.000000",
+    "chroma_temporal=4.500000")
+adm.setContainer(
+    "MP4",
+    "muxerType=0",
+    "optimize=1",
+    "forceAspectRatio=False",
+    "aspectRatio=1",
+    "displayWidth=1280",
+    "rotation=0",
+    "clockfreq=0")

gopro_4:3_maxlens/preset_gopro_4:3_maxlens_HD_720p.py

@@ -1,12 +1,12 @@
 #PY  <- Needed to identify #
 # RozK
-# Custom preset for GoPro, 8:7 ratio, without hypersmooth, output widened scaled to QHD (540p)
+# Custom preset for GoPro, 4:3 ratio, Max SuperView, without hypersmooth, output widened scaled to HD (720p)
 
 adm = Avidemux()
 adm.videoCodec(
     "x264",
     "useAdvancedConfiguration=False",
-    "general.params=CBR=8192",
+    "general.params=CBR=12288",
     "general.threads=0",
     "general.preset=slow",
     "general.tuning=film",
@@ -88,11 +88,11 @@ adm.videoCodec(
 adm.clearVideoFilters()
 adm.addVideoFilter(
     "shaderLoader",
-    "shaderFile=/opt/rk/avidemux/unfish_gopro_8:7.glsl")
+    "shaderFile=/opt/rk/avidemux/unfish_gopro_4:3_maxlens.glsl")
 adm.addVideoFilter(
     "swscale",
-    "width=616",
+    "width=960",
-    "height=540",
+    "height=720",
     "algo=1",
     "sourceAR=0",
     "targetAR=0",

gopro_4:3_maxlens/unfish_gopro_4:3_maxlens.glsl

@@ -0,0 +1,38 @@
+// RozK
+// Fisheye removal for GoPro 11+, 4:3 ratio, Max SuperView, without hypersmooth
+// Adapted from https://github.com/duducosmos/defisheye
+// itself based on http://www.fmwconcepts.com/imagemagick/defisheye/index.php
+
+#extension GL_ARB_texture_rectangle: enable
+
+uniform sampler2DRect myTextureY;
+uniform sampler2DRect myTextureU;
+uniform sampler2DRect myTextureV;
+uniform vec2 myResolution;
+uniform float pts;
+
+const vec2 half_pixel = vec2(0.5, 0.5);
+
+const vec2 input_scale = vec2(0.602294, 1.0);
+const float input_fov = 169.0;
+const float output_fov = 122.604854;
+
+vec2 unfish(vec2 coord) {
+    float diameter = sqrt(dot(myResolution, myResolution));
+    vec2 center = myResolution * 0.5;
+    vec2 input_position = (coord - center) * input_scale;
+    float input_distance = length(input_position);
+    float input_len = diameter / radians(input_fov);
+    float output_len = diameter / (2.0 * tan(radians(output_fov) * 0.5));
+    float unfish_ratio = input_len * atan(input_distance / output_len) / input_distance;
+    return center + input_position * unfish_ratio;
+}
+
+void main() {
+    vec2 y_coord = unfish(gl_TexCoord[0].xy + half_pixel);
+    vec2 uv_coord = y_coord * 0.5;
+    vec4 y = texture2DRect(myTextureY, y_coord);
+    vec4 u = texture2DRect(myTextureU, uv_coord);
+    vec4 v = texture2DRect(myTextureV, uv_coord);
+    gl_FragColor = vec4(y.r, u.r, v.r, 1.0);
+}

gopro_8:7/compute_gopro_8:7.py

@@ -31,7 +31,6 @@ def width_rounded_8(height):
     width = int(round(height * input_ratio))
     return ((width + 4) // 8) * 8
 
-print("QHD            = %i x 540" % width_rounded_8(540))
 print("HD             = %i x 720" % width_rounded_8(720))
 print("Full HD        = %i x 1080" % width_rounded_8(1080))
 print("4K             = %i x 2160" % width_rounded_8(2160))

install_gopro_4:3_maxlens.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+# RozK
+rm -f ~/.avidemux6/custom/preset_gopro_4:3_maxlens*
+cp gopro_4:3_maxlens/preset_gopro_4:3_maxlens* ~/.avidemux6/custom/
+sudo mkdir -p /opt/rk/avidemux
+sudo cp gopro_4:3_maxlens/unfish_gopro_4:3_maxlens.glsl /opt/rk/avidemux

install_gopro_8:7.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 # RozK
-rm -f ~/.avidemux6/custom/preset_gopro_*
+rm -f ~/.avidemux6/custom/preset_gopro_8:7*
-cp gopro_8:7/preset_gopro_* ~/.avidemux6/custom/
+cp gopro_8:7/preset_gopro_8:7* ~/.avidemux6/custom/
 sudo mkdir -p /opt/rk/avidemux
 sudo cp gopro_8:7/unfish_gopro_8:7.glsl /opt/rk/avidemux