roz/avidemux_shaders
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keep original format and scale pixels instead

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This commit is contained in:
Roz K
2025-07-29 05:09:28 +02:00
parent 179ebc96d9
commit 39702c78ab
6 changed files with 14 additions and 11 deletions
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5
gopro_8:7/compute_gopro_8:7.py
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@ -9,6 +9,7 @@ import math
frame_width = 8
frame_height = 7
input_ratio = frame_width / frame_height
input_vertical_fov = 108.0
input_diagonal_fov = 156.0
@ -20,14 +21,14 @@ output_horizontal_length = math.sqrt((input_diagonal_length ** 2) / (input_verti
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 = output_horizontal_length / input_vertical_length
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 * output_ratio))
width = int(round(height * input_ratio))
return ((width + 4) // 8) * 8
print("QHD = %i x 540" % width_rounded_8(540))

2
gopro_8:7/preset_gopro_8:7_4K_2160p.py
View File

@ -91,7 +91,7 @@ adm.addVideoFilter(
"shaderFile=/opt/rk/avidemux/unfish_gopro_8:7.glsl")
adm.addVideoFilter(
"swscale",
"width=3312",
"width=2472",
"height=2160",
"algo=1",
"sourceAR=0",

2
gopro_8:7/preset_gopro_8:7_FullHD_1080p.py
View File

@ -91,7 +91,7 @@ adm.addVideoFilter(
"shaderFile=/opt/rk/avidemux/unfish_gopro_8:7.glsl")
adm.addVideoFilter(
"swscale",
"width=1656",
"width=1232",
"height=1080",
"algo=1",
"sourceAR=0",

2
gopro_8:7/preset_gopro_8:7_HD_720p.py
View File

@ -91,7 +91,7 @@ adm.addVideoFilter(
"shaderFile=/opt/rk/avidemux/unfish_gopro_8:7.glsl")
adm.addVideoFilter(
"swscale",
"width=1104",
"width=824",
"height=720",
"algo=1",
"sourceAR=0",

2
gopro_8:7/preset_gopro_8:7_QHD_540p.py
View File

@ -91,7 +91,7 @@ adm.addVideoFilter(
"shaderFile=/opt/rk/avidemux/unfish_gopro_8:7.glsl")
adm.addVideoFilter(
"swscale",
"width=832",
"width=616",
"height=540",
"algo=1",
"sourceAR=0",

12
gopro_8:7/unfish_gopro_8:7.glsl
View File

@ -13,17 +13,19 @@ uniform float pts;
const vec2 half_pixel = vec2(0.5, 0.5);
const vec2 input_scale = vec2(0.652485, 1.0);
const float input_fov = 156.0;
const float output_fov = 119.789529;
vec2 unfish(vec2 coord) {
float diameter = sqrt(dot(myResolution, myResolution));
vec2 center = myResolution * 0.5;
vec2 position = coord - center;
float input_distance = length(position);
float input_foc = diameter / radians(input_fov);
float output_foc = diameter / (2.0 * tan(radians(output_fov) * 0.5));
return center + position * (input_foc * atan(input_distance / output_foc) / input_distance);
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() {