roz/avidemux_shaders
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v2.0, better quality, less perspective deformation #1

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roz merged 27 commits from v2.0 into main 2025-10-09 04:46:20 +02:00
Conversation 0 Commits 27 Files Changed 11 +1004 -511
11 changed files with 1004 additions and 511 deletions
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2
gopro_8:7/preset_gopro_8:7.py
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@ -103,7 +103,7 @@ adm.addVideoFilter(
"shaderLoader", "shaderFile=/opt/rk/avidemux/unfish_gopro_8:7.glsl") "shaderLoader", "shaderFile=/opt/rk/avidemux/unfish_gopro_8:7.glsl")
adm.addVideoFilter( adm.addVideoFilter(
"swscale", "swscale",
"width=2832", "width=2468",
"height=2160", "height=2160",
"algo=2", "algo=2",
"sourceAR=0", "sourceAR=0",

5
gopro_8:7/unfish_gopro_8:7.glsl
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@ -20,7 +20,7 @@
#define color_conversion #define color_conversion
#define texture_filtering #define texture_filtering
//#define rotate_180 #define rotate_180
//#define debug_borders //#define debug_borders
#undef highp // defined by Qt-OpenGl #undef highp // defined by Qt-OpenGl
@ -37,7 +37,6 @@ uniform float pts;
// parameters // parameters
const vec2 sensor_size = vec2(5.949440, 5.205760); const vec2 sensor_size = vec2(5.949440, 5.205760);
const vec2 rectilinear_scale = vec2(1.147370, 1.0);
const float equidistant_focal_length = 2.920000; const float equidistant_focal_length = 2.920000;
const float rectilinear_focal_length = 2.102263; const float rectilinear_focal_length = 2.102263;
@ -56,7 +55,7 @@ vec2 sensor_to_texture;
void initialize() { void initialize() {
texture_center = myResolution * 0.5; texture_center = myResolution * 0.5;
texture_to_sensor = (sensor_size / myResolution) * rectilinear_scale; texture_to_sensor = (sensor_size / myResolution);
#ifdef rotate_180 #ifdef rotate_180
texture_to_sensor *= -1.0; texture_to_sensor *= -1.0;
#endif #endif

11
gopro_8:7/unfish_gopro_8:7.py
View File

@ -87,26 +87,19 @@ print("linear fov : horizontal = %7.3f, vertical = %7.3f, diagonal = %7.3f (deg
print("\n--- shader parameters ---\n") print("\n--- shader parameters ---\n")
output_size_horizontal = 2.0 * rectilinear_radius(gopro_fov_horizontal * 0.5)
output_size_vertical = gopro_size_vertical
output_scale_horizontal = output_size_horizontal / gopro_size_horizontal
print("""// parameters\n print("""// parameters\n
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 equidistant_focal_length = %.6f;
const float rectilinear_focal_length = %.6f;""" % ( const float rectilinear_focal_length = %.6f;""" % (
gopro_size_horizontal, gopro_size_vertical, gopro_size_horizontal, gopro_size_vertical,
output_scale_horizontal,
gopro_focal_length, gopro_focal_length,
rectilinear_focal_length_vertical) rectilinear_focal_length_vertical)
) )
print("\n--- filters parameters ---\n") print("\n--- output size ---\n")
def print_output_array(array_vertical): def print_output_array(array_vertical):
array_horizontal = (array_vertical / gopro_array_vertical) * gopro_array_horizontal * output_scale_horizontal array_horizontal = (array_vertical / gopro_array_vertical) * gopro_array_horizontal
print("resize: width = %d, height = %d" % ( print("resize: width = %d, height = %d" % (
round(array_horizontal / 4.0) * 4, round(array_horizontal / 4.0) * 4,
array_vertical)) array_vertical))