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fisheye removel for 4:3 max superview

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Roz K
2025-07-31 04:43:45 +02:00
parent 142cf30662
commit 00343ce52d
9 changed files with 572 additions and 6 deletions
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30
README.md
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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
@ -24,18 +26,38 @@ Preset for mp4, HD, 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

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gopro_4:3_maxlens/compute_gopro_4:3_maxlens.py Normal file
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# 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))

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gopro_4:3_maxlens/preset_gopro_4:3_maxlens_4K_2160p.py Normal file
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#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")

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gopro_4:3_maxlens/preset_gopro_4:3_maxlens_4K_youtube.py Normal file
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#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")

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gopro_4:3_maxlens/preset_gopro_4:3_maxlens_FullHD_1080p.py Normal file
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#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")

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gopro_4:3_maxlens/preset_gopro_4:3_maxlens_HD_720p.py Normal file
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#PY <- Needed to identify #
# RozK
# 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=12288",
"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=960",
"height=720",
"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")

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gopro_4:3_maxlens/unfish_gopro_4:3_maxlens.glsl Normal file
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// 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);
}

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install_gopro_4:3_maxlens.sh Executable file
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#!/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

4
install_gopro_8:7.sh
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@ -1,6 +1,6 @@
#!/bin/sh
# RozK
rm -f ~/.avidemux6/custom/preset_gopro_*
cp gopro_8:7/preset_gopro_* ~/.avidemux6/custom/
rm -f ~/.avidemux6/custom/preset_gopro_8:7*
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