Speed up frame grain level measure by denoising a fraction of the frame

Author: porcino

Av1ador/Form1.cs

@@ -25,7 +25,7 @@ public partial class Form1 : Form
         [DllImport("user32.dll")]
         static extern bool GetCursorPos(ref Point point);
 
-        private readonly string title = "Av1ador 1.4.1";
+        private readonly string title = "Av1ador 1.4.2";
         private readonly Regex formatos = new Regex(".+(mkv|mp4|avi|webm|ivf|m2ts|wmv|mpg|mov|3gp|ts|mpeg|y4m|vob|m2v|m4v|flv|asf|png)$", RegexOptions.IgnoreCase);
         private Player mpv;
         private Video primer_video, segundo_video;
@@ -328,7 +328,7 @@ private void Get_res(string entry_res = "")
                     }
                 }
             }
-            if (uh / primer_video.Sar > int.Parse(resComboBox.Items[0].ToString().Replace("p", "")))
+            if (resComboBox.Items.Count == 0 || uh / primer_video.Sar > int.Parse(resComboBox.Items[0].ToString().Replace("p", "")))
             {
                 resComboBox.Items.Insert(0, uh / primer_video.Sar + "p");
                 resComboBox.Text = resComboBox.Items[0].ToString();

Av1ador/Video.cs

@@ -469,22 +469,25 @@ internal void Grain_detect(NumericUpDown gsupdown, Label status, int maxgs, Labe
                     Process ffmpeg = new Process();
                     Func.Setinicial(ffmpeg, 3);
                     int ss = (int)(Duration * i / (loop + 2));
-                    string cmd = " -loglevel panic -init_hw_device opencl:" + Encoder.OCL_Device + " -ss " + ss + " -i \"" + File + "\"  -an -sn -frames:v 1 -vf \"" + crop + "thumbnail=n=" + frames + ",scale=w=1920:h=1080:force_original_aspect_ratio=decrease:force_divisible_by=2";
+                    string cmd = " -loglevel panic -init_hw_device opencl:" + Encoder.OCL_Device + " -ss " + ss + " -i \"" + File + "\"  -an -sn -frames:v 1 -vf \"" + crop + "crop='min(386,iw):min(386,ih)':exact=1,thumbnail=n=" + frames;
                     if (Hdr == 1)
                         cmd += ",format=p010,hwupload,tonemap_opencl=tonemap=hable:r=tv:p=bt709:t=bt709:m=bt709:format=nv12,hwdownload,format=nv12";
                     else if (Hdr == 2 && Encoder.Libplacebo)
                     {
                         cmd = cmd.Replace("opencl:" + Encoder.OCL_Device, "vulkan:" + Encoder.Vkn_Device);
                         cmd += ",format=yuv420p10le,hwupload,libplacebo=tonemapping=reinhard:range=tv:color_primaries=bt709:color_trc=bt709:colorspace=bt709:format=yuv420p,hwdownload,format=yuv420p";
                     }
-                    cmd += "\" -lossless 1 -compression_level 1 -y \"" + name + "_th.webp\"";
+                    cmd += "\" -y \"" + name + "_ss.png\"";
                     ffmpeg.StartInfo.Arguments = cmd;
                     ffmpeg.Start();
                     ffmpeg.WaitForExit(-1);
-                    ffmpeg.StartInfo.Arguments = " -loglevel panic -init_hw_device opencl:" + Encoder.OCL_Device + " -i \"" + name + "_th.webp\" -frames:v 1 -vf pad=(iw+16):(ih+16):8:8,format=pix_fmts=yuv420p,hwupload,nlmeans_opencl=s=1.8:p=7:r=9,hwdownload,format=pix_fmts=yuv420p,crop=(iw-16):(ih-16):8:8 -lossless 1 -compression_level 1 -y \"" + name + "_th_dns.webp\"";
+                    ffmpeg.StartInfo.Arguments = " -loglevel panic -i \"" + name + "_ss.png\" -vf crop='min(270,iw):min(270,ih)' -lossless 1 -compression_level 1 -y \"" + name + "_th.webp\"";
                     ffmpeg.Start();
                     ffmpeg.WaitForExit(-1);
-                    ffmpeg.StartInfo.Arguments = " -loglevel panic -init_hw_device opencl:" + Encoder.OCL_Device + " -i \"" + name + "_th.webp\" -frames:v 1 -vf pad=(iw+12):(ih+12):6:6,format=pix_fmts=yuv420p,hwupload,nlmeans_opencl=s=4:p=5:r=15,hwdownload,format=pix_fmts=yuv420p,crop=(iw-10):(ih-12):6:6 -lossless 1 -compression_level 1 -y \"" + name + "_th_dnb.webp\"";
+                    ffmpeg.StartInfo.Arguments = " -loglevel panic -init_hw_device opencl:" + Encoder.OCL_Device + " -i \"" + name + "_ss.png\" -frames:v 1 -vf format=pix_fmts=yuv420p,hwupload,nlmeans_opencl=s=1.8:p=7:r=9,hwdownload,format=pix_fmts=yuv420p,crop='min(270,iw):min(270,ih)':exact=1 -lossless 1 -compression_level 1 -y \"" + name + "_th_dns.webp\"";
+                    ffmpeg.Start();
+                    ffmpeg.WaitForExit(-1);
+                    ffmpeg.StartInfo.Arguments = " -loglevel panic -init_hw_device opencl:" + Encoder.OCL_Device + " -i \"" + name + "_ss.png\" -frames:v 1 -vf format=pix_fmts=yuv420p,hwupload,nlmeans_opencl=s=4:p=5:r=15,hwdownload,format=pix_fmts=yuv420p,crop='min(270,iw):min(270,ih)':exact=1 -lossless 1 -compression_level 1 -y \"" + name + "_th_dnb.webp\"";
                     ffmpeg.Start();
                     ffmpeg.WaitForExit(-1);
                     double s1 = new FileInfo(name + "_th.webp").Length;
@@ -537,6 +540,8 @@ public void Clear_tmp()
             string name = Path.GetFileNameWithoutExtension(File);
             try
             {
+                if (System.IO.File.Exists(name + "_ss.png"))
+                    System.IO.File.Delete(name + "_ss.png");
                 if (System.IO.File.Exists(name + "_th.webp"))
                     System.IO.File.Delete(name + "_th.webp");
                 if (System.IO.File.Exists(name + "_th_dns.webp"))