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focal length, preset and license

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Roz K
2025-09-20 12:53:45 +02:00
parent acd59515aa
commit 676e63eae5
5 changed files with 828 additions and 103 deletions
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112
gopro_8:7/preset_gopro_8:7.py Normal file
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@ -0,0 +1,112 @@
#PY <- Needed to identify #
# RozK
# Custom preset for GoPro, 8:7 ratio, 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=True",
"general.fast_first_pass=False",
"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.addVideoFilter(
"shaderLoader", "shaderFile=/opt/rk/avidemux/unfish_gopro_8:7.glsl")
adm.addVideoFilter(
"swscale", "width=2792", "height=2160", "algo=2", "sourceAR=0", "targetAR=0", "lockAR=False", "roundup=0")
adm.audioClearTracks()
if adm.audioTotalTracksCount() <= 0:
raise("Cannot add audio track 0, total tracks: " + str(adm.audioTotalTracksCount()))
adm.audioAddTrack(0)
adm.audioCodec(0, "LavAAC", "bitrate=128")
adm.audioSetDrc2(0, 1, 1, 0.001, 0.2, 1, 2, -12)
adm.audioSetEq(0, 0, 0, 0, 0, 880, 5000)
adm.audioSetChannelGains(0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
adm.audioSetChannelDelays(0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
adm.audioSetChannelRemap(0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8)
adm.audioSetShift(0, 0, 0)
adm.audioSetNormalize2(0, 1, 10, -30)
adm.setContainer(
"MP4",
"muxerType=0",
"optimize=1",
"forceAspectRatio=False",
"aspectRatio=1",
"displayWidth=1280",
"rotation=0",
"clockfreq=0")

49
gopro_8:7/unfish_gopro_8:7.glsl
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@ -1,13 +1,26 @@
#version 130
// RozK
// Fisheye removal for GoPro 11+, 8:7 ratio, without hypersmooth
// Copyright (C) 2025 Jean-Baptiste Berlioz
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
#extension GL_ARB_texture_rectangle: enable
#undef highp // defined by Qt-OpenGl
#define rotate_180
//#define debug_borders
#undef highp // defined by Qt-OpenGl
precision highp float;
// uniforms
@ -19,9 +32,8 @@ uniform float pts;
// parameters
const vec2 sensor_size = vec2(5.949440, 5.205760);
const vec2 pixel_scale = vec2(0.871558, 1.0);
const float equidistant_focal_length = 2.920000;
const float rectilinear_focal_length = 2.102263;
const float equidistant_focal_length = 3.020000;
const float rectilinear_focal_length = 2.232346;
// constants
const int subsampling = 4;
@ -36,39 +48,34 @@ vec2 sensor_to_texture;
void initialize() {
texture_center = myResolution * 0.5;
texture_to_sensor = (sensor_size / myResolution) * pixel_scale;
texture_to_sensor = sensor_size / myResolution;
#ifdef rotate_180
texture_to_sensor *= -1.0;
#endif
sensor_to_texture = (myResolution / sensor_size);
sensor_to_texture = myResolution / sensor_size;
}
vec2 unfish_coord(const in vec2 coord) {
vec2 equidistant_to_rectilinear(const in vec2 coord) {
float rectilinear_radius = length(coord);
float rectilinear_angle = atan(rectilinear_radius / rectilinear_focal_length);
float equidistant_radius = rectilinear_angle * equidistant_focal_length;
return coord * (equidistant_radius / rectilinear_radius);
}
vec4 unfish_pixel(const in vec2 coord) {
vec2 unfished = unfish_coord((coord - texture_center) * texture_to_sensor);
vec2 y_coord = texture_center + unfished * sensor_to_texture;
// y_coord.y = coord.y;
vec4 sample_texture(const in vec2 coord) {
vec2 rectilinear = equidistant_to_rectilinear((coord - texture_center) * texture_to_sensor);
vec2 y_coord = texture_center + rectilinear * sensor_to_texture;
#ifdef debug_borders
if (y_coord.x < 0.0 || y_coord.y < 0.0 || y_coord.x > myResolution.x || y_coord.y > myResolution.y) {
return vec4(1.0);
}
#endif
vec2 uv_coord = y_coord * 0.5;
return vec4(
texture2DRect(myTextureY, y_coord).r,
texture2DRect(myTextureU, uv_coord).r,
texture2DRect(myTextureV, uv_coord).r,
1.0
);
texture2DRect(myTextureY, y_coord).x,
texture2DRect(myTextureU, uv_coord).x,
texture2DRect(myTextureV, uv_coord).x,
1.0);
}
void main() {
@ -80,7 +87,7 @@ void main() {
for (int y = 0; y < subsampling; y++) {
for (int x = 0; x < subsampling; x++) {
vec2 offset = subsampling_start + subsampling_step * vec2(x, y);
pixel += unfish_pixel(coord + offset);
pixel += sample_texture(coord + offset);
}
}

36
gopro_8:7/unfish_gopro_8:7.py
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@ -1,4 +1,18 @@
# RozK
# Fisheye removal for GoPro 11+, 8:7 ratio, without hypersmooth
# Copyright (C) 2025 Jean-Baptiste Berlioz
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
import math
@ -38,7 +52,7 @@ print("gopro size : horizontal = %7.3f, vertical = %7.3f, diagonal = %7.3f (mm)
# https://thinglabs.io/gopro-focal-radius-guide
gopro_focal_length = 2.92 # mm
gopro_focal_length = 3.02 # mm
gopro_radius_horizontal = gopro_size_horizontal * 0.5
gopro_radius_vertical = gopro_size_vertical * 0.5
@ -84,19 +98,23 @@ print("linear fov : horizontal = %7.3f, vertical = %7.3f, diagonal = %7.3f (deg
print("\n--- shader parameters ---\n")
rectilinear_angle_horizontal = rectilinear_angle(gopro_radius_horizontal, rectilinear_focal_length_horizontal)
preserved_radius_horizontal = rectilinear_radius(rectilinear_angle_horizontal, rectilinear_focal_length_vertical)
pixel_scale = gopro_radius_horizontal / preserved_radius_horizontal
print("""// parameters
const vec2 sensor_size = vec2(%.6f, %.6f);
const vec2 pixel_scale = vec2(%.6f, 1.0);
const float equidistant_focal_length = %.6f;
const float rectilinear_focal_length = %.6f;
""" % (
gopro_size_horizontal, gopro_size_vertical,
pixel_scale,
gopro_focal_length,
rectilinear_focal_length_vertical)
)
print("\n--- filter parameters 4K ---\n")
width_scale = rectilinear_focal_length_vertical / rectilinear_focal_length_horizontal
output_height = 2160
output_width = int(round((output_height / 7.0) * 8.0 * width_scale))
print("resize: width = %d, height = %d" % (
output_width,
output_height))