roz/avidemux_shaders
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focal length and remove cropping

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This commit is contained in:
Roz K
2025-10-01 00:11:30 +02:00
parent 8c60a46945
commit d346c69f69
3 changed files with 11 additions and 30 deletions
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9
gopro_8:7/preset_gopro_8:7.py
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@ -101,16 +101,9 @@ adm.videoCodec(
"ratecontrol.lookahead=40")
adm.addVideoFilter(
"shaderLoader", "shaderFile=/opt/rk/avidemux/unfish_gopro_8:7.glsl")
adm.addVideoFilter(
"crop",
"top=80",
"bottom=0",
"left=0",
"right=0",
"ar_select=0")
adm.addVideoFilter(
"swscale",
"width=2880",
"width=2832",
"height=2160",
"algo=2",
"sourceAR=0",

6
gopro_8:7/unfish_gopro_8:7.glsl
View File

@ -37,9 +37,9 @@ uniform float pts;
// parameters
const vec2 sensor_size = vec2(5.949440, 5.205760);
const vec2 rectilinear_scale = vec2(1.138819, 1.0);
const float equidistant_focal_length = 2.970000;
const float rectilinear_focal_length = 2.167601;
const vec2 rectilinear_scale = vec2(1.147370, 1.0);
const float equidistant_focal_length = 2.920000;
const float rectilinear_focal_length = 2.102263;
// constants

26
gopro_8:7/unfish_gopro_8:7.py
View File

@ -41,7 +41,7 @@ print("gopro size : horizontal = %7.3f, vertical = %7.3f, diagonal = %7.3f (mm)
# https://thinglabs.io/gopro-focal-length-guide
gopro_focal_length = 2.97 # mm
gopro_focal_length = 2.92
gopro_radius_horizontal = gopro_size_horizontal * 0.5
gopro_radius_vertical = gopro_size_vertical * 0.5
@ -93,32 +93,20 @@ output_size_vertical = gopro_size_vertical
output_scale_horizontal = output_size_horizontal / gopro_size_horizontal
print("""// parameters
const vec2 sensor_size = vec2(%.6f, %.6f);
const vec2 sensor_size = vec2(%.6f, %.6f);
const vec2 rectilinear_scale = vec2(%.6f, 1.0);
const float equidistant_focal_length = %.6f;
const float rectilinear_focal_length = %.6f;
const vec2 rectilinear_scale = vec2(%.6F, 1.0);""" % (
const float rectilinear_focal_length = %.6f;""" % (
gopro_size_horizontal, gopro_size_vertical,
output_scale_horizontal,
gopro_focal_length,
rectilinear_focal_length_vertical,
output_scale_horizontal)
rectilinear_focal_length_vertical)
)
print("\n--- filters parameters ---\n")
output_ratio_horizontal = 4.0
output_ratio_vertical = 3.0
output_crop_ratio = output_ratio_vertical / (output_ratio_horizontal / output_scale_horizontal)
output_crop_horizontal = gopro_texture_horizontal
output_crop_vertical = output_crop_horizontal * output_crop_ratio
print("crop : width = %d, height = %d" % (
output_crop_horizontal,
round(output_crop_vertical)))
def print_output_array(array_vertical):
array_horizontal = (array_vertical / output_ratio_vertical) * output_ratio_horizontal
array_horizontal = (array_vertical / gopro_array_vertical) * gopro_array_horizontal * output_scale_horizontal
print("resize: width = %d, height = %d" % (
round(array_horizontal / 4.0) * 4,
array_vertical))