cleanup: moving and renaming

gopro_8:7/compute_gopro_8:7.py

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+# RozK
+# Computes fisheye removal parameters for GoPro 11+, 8:7 ratio, without hypersmooth,
+# keeping the vertical FOV and widening the frame to preserve the diagonal FOV
+
+# https://community.gopro.com/s/article/HERO11-Black-Mini-Digital-Lenses-FOV-Information?language=fr
+
+import math
+
+frame_width = 8
+frame_height = 7
+
+input_vertical_fov = 108.0
+input_diagonal_fov = 156.0
+
+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 = 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))
+    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))

gopro_8:7/preset_gopro_8:7_1080.py

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+#PY  <- Needed to identify #
+
+# Custom preset for GoPro, 8:7 ratio, 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.addVideoFilter("shaderLoader", "shaderFile=/opt/rk/avidemux/unfish_gopro_8:7.glsl")
+adm.addVideoFilter("swscale", "width=1656", "height=1080", "algo=1", "sourceAR=0", "targetAR=0", "lockAR=False", "roundup=2")
+adm.setContainer("MP4", "muxerType=0", "optimize=1", "forceAspectRatio=False", "aspectRatio=1", "displayWidth=1280", "rotation=0", "clockfreq=0")

gopro_8:7/unfish_gopro_8:7.glsl

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+// RozK
+// Fisheye removal for GoPro 11+, 8:7 ratio, 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 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);
+}
+
+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);
+}