Added 4x/8x support for RIFE-NCNN, added CFR/VFR option

Code/App.config

@@ -17,6 +17,10 @@
         <assemblyIdentity name="System.Security.Principal.Windows" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
         <bindingRedirect oldVersion="0.0.0.0-4.0.1.0" newVersion="4.0.1.0" />
       </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.6.0" newVersion="4.0.6.0" />
+      </dependentAssembly>
     </assemblyBinding>
   </runtime>
 </configuration>

Code/AudioVideo/FFmpegCommands.cs

@@ -71,7 +71,10 @@ namespace Flowframes
             string enc = useH265 ? "libx265" : "libx264";
             string loopStr = (looptimes > 0) ? $"-stream_loop {looptimes}" : "";
             string presetStr = $"-preset {Config.Get("ffEncPreset")}";
-            string args = $" {loopStr} -vsync 1 -f concat -safe 0 -i {framesFile.Wrap()} -r {fps.ToString().Replace(",", ".")} -c:v {enc} -crf {crf} {presetStr} {videoEncArgs} -threads {Config.GetInt("ffEncThreads")} -c:a copy {outPath.Wrap()}";
+            //Logger.Log("#1");
+            string vsyncStr = Config.GetInt("vfrMode") == 0 ? "-vsync 1" : "-vsync 2";
+            //Logger.Log("#2");
+            string args = $" {loopStr} {vsyncStr} -f concat -safe 0 -i {framesFile.Wrap()} -r {fps.ToString().Replace(",", ".")} -c:v {enc} -crf {crf} {presetStr} {videoEncArgs} -threads {Config.GetInt("ffEncThreads")} -c:a copy {outPath.Wrap()}";
             await AvProcess.RunFfmpeg(args, AvProcess.LogMode.OnlyLastLine);
         }
 

Code/Flowframes.csproj

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="packages\OpenCvSharp4.runtime.win.4.5.0.20201013\build\net\OpenCvSharp4.runtime.win.props" Condition="Exists('packages\OpenCvSharp4.runtime.win.4.5.0.20201013\build\net\OpenCvSharp4.runtime.win.props')" />
   <Import Project="packages\Costura.Fody.4.1.0\build\Costura.Fody.props" Condition="Exists('packages\Costura.Fody.4.1.0\build\Costura.Fody.props')" />
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
@@ -94,19 +95,40 @@
     <Reference Include="NvAPIWrapper, Version=0.8.0.98, Culture=neutral, PublicKeyToken=310fd07b25df79b3, processorArchitecture=MSIL">
       <HintPath>packages\NvAPIWrapper.Net.0.8.0.98\lib\net45\NvAPIWrapper.dll</HintPath>
     </Reference>
+    <Reference Include="OpenCvSharp, Version=1.0.0.0, Culture=neutral, PublicKeyToken=6adad1e807fea099, processorArchitecture=MSIL">
+      <HintPath>packages\OpenCvSharp4.4.5.0.20201013\lib\net461\OpenCvSharp.dll</HintPath>
+    </Reference>
+    <Reference Include="OpenCvSharp.Blob, Version=1.0.0.0, Culture=neutral, PublicKeyToken=6adad1e807fea099, processorArchitecture=MSIL">
+      <HintPath>packages\OpenCvSharp4.4.5.0.20201013\lib\net461\OpenCvSharp.Blob.dll</HintPath>
+    </Reference>
+    <Reference Include="OpenCvSharp.Extensions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=6adad1e807fea099, processorArchitecture=MSIL">
+      <HintPath>packages\OpenCvSharp4.4.5.0.20201013\lib\net461\OpenCvSharp.Extensions.dll</HintPath>
+    </Reference>
     <Reference Include="PagedControl, Version=2.2.0.0, Culture=neutral, processorArchitecture=MSIL">
       <HintPath>packages\PagedControl.2.2.0\lib\net35\PagedControl.dll</HintPath>
     </Reference>
     <Reference Include="PresentationCore" />
     <Reference Include="PresentationFramework" />
     <Reference Include="System" />
+    <Reference Include="System.Buffers, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Buffers.4.5.1\lib\net461\System.Buffers.dll</HintPath>
+    </Reference>
     <Reference Include="System.Core" />
     <Reference Include="System.Design" />
     <Reference Include="System.Drawing.Common, Version=4.0.0.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
       <HintPath>packages\System.Drawing.Common.5.0.0\lib\net461\System.Drawing.Common.dll</HintPath>
     </Reference>
     <Reference Include="System.Management" />
+    <Reference Include="System.Memory, Version=4.0.1.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>packages\System.Memory.4.5.4\lib\net461\System.Memory.dll</HintPath>
+    </Reference>
     <Reference Include="System.Numerics" />
+    <Reference Include="System.Numerics.Vectors, Version=4.1.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>packages\System.Numerics.Vectors.4.5.0\lib\net46\System.Numerics.Vectors.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=4.0.6.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>packages\System.Runtime.CompilerServices.Unsafe.4.7.1\lib\net461\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
+    </Reference>
     <Reference Include="System.Security.Claims, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <HintPath>packages\System.Security.Claims.4.3.0\lib\net46\System.Security.Claims.dll</HintPath>
       <Private>True</Private>
@@ -311,6 +333,7 @@
     <Error Condition="!Exists('packages\Costura.Fody.4.1.0\build\Costura.Fody.props')" Text="$([System.String]::Format('$(ErrorText)', 'packages\Costura.Fody.4.1.0\build\Costura.Fody.props'))" />
     <Error Condition="!Exists('packages\7z.NET.1.0.3\build\7z.NET.targets')" Text="$([System.String]::Format('$(ErrorText)', 'packages\7z.NET.1.0.3\build\7z.NET.targets'))" />
     <Error Condition="!Exists('packages\Fody.6.3.0\build\Fody.targets')" Text="$([System.String]::Format('$(ErrorText)', 'packages\Fody.6.3.0\build\Fody.targets'))" />
+    <Error Condition="!Exists('packages\OpenCvSharp4.runtime.win.4.5.0.20201013\build\net\OpenCvSharp4.runtime.win.props')" Text="$([System.String]::Format('$(ErrorText)', 'packages\OpenCvSharp4.runtime.win.4.5.0.20201013\build\net\OpenCvSharp4.runtime.win.props'))" />
   </Target>
   <Import Project="packages\7z.NET.1.0.3\build\7z.NET.targets" Condition="Exists('packages\7z.NET.1.0.3\build\7z.NET.targets')" />
   <Import Project="packages\Fody.6.3.0\build\Fody.targets" Condition="Exists('packages\Fody.6.3.0\build\Fody.targets')" />

Code/Form1.Designer.cs

@@ -1107,12 +1107,13 @@
             // tilesizeNotAvailLabel
             // 
             this.tilesizeNotAvailLabel.ForeColor = System.Drawing.Color.Silver;
-            this.tilesizeNotAvailLabel.Location = new System.Drawing.Point(278, 131);
+            this.tilesizeNotAvailLabel.Location = new System.Drawing.Point(278, 127);
             this.tilesizeNotAvailLabel.Margin = new System.Windows.Forms.Padding(8, 0, 3, 0);
             this.tilesizeNotAvailLabel.Name = "tilesizeNotAvailLabel";
-            this.tilesizeNotAvailLabel.Size = new System.Drawing.Size(203, 24);
+            this.tilesizeNotAvailLabel.Size = new System.Drawing.Size(203, 25);
             this.tilesizeNotAvailLabel.TabIndex = 37;
             this.tilesizeNotAvailLabel.Text = "Not available for the selected AI.";
+            this.tilesizeNotAvailLabel.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
             this.tilesizeNotAvailLabel.Visible = false;
             // 
             // label1

Code/Form1.cs

@@ -239,8 +239,8 @@ namespace Flowframes
         {
             if (initialized && GetAi().aiName == Networks.rifeNcnn.aiName && interpFactorCombox.SelectedIndex != 0)
             {
-                MessageBox.Show("RIFE-NCNN currently only supports x2 interpolation.");
+                //MessageBox.Show("RIFE-NCNN currently only supports x2 interpolation.");
-                interpFactorCombox.SelectedIndex = 0; // TODO: Add RIFE 4x/8x workaround & improve CAIN workaround
+                //interpFactorCombox.SelectedIndex = 0; // TODO: Add RIFE 4x/8x workaround & improve CAIN workaround
             }
             UpdateOutputFPS();
         }

Code/Forms/SettingsForm.Designer.cs

@@ -130,6 +130,8 @@
             this.cmdDebugMode = new System.Windows.Forms.ComboBox();
             this.titleLabel = new System.Windows.Forms.Label();
             this.toolTip1 = new System.Windows.Forms.ToolTip(this.components);
+            this.label48 = new System.Windows.Forms.Label();
+            this.vfrMode = new System.Windows.Forms.ComboBox();
             this.settingsTabList.SuspendLayout();
             this.generalTab.SuspendLayout();
             this.tabListPage2.SuspendLayout();
@@ -204,12 +206,14 @@
             // tempDirBrowseBtn
             // 
             this.tempDirBrowseBtn.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(64)))), ((int)(((byte)(64)))), ((int)(((byte)(64)))));
+            this.tempDirBrowseBtn.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
             this.tempDirBrowseBtn.ForeColor = System.Drawing.Color.White;
             this.tempDirBrowseBtn.Location = new System.Drawing.Point(709, 66);
             this.tempDirBrowseBtn.Name = "tempDirBrowseBtn";
             this.tempDirBrowseBtn.Size = new System.Drawing.Size(50, 23);
             this.tempDirBrowseBtn.TabIndex = 70;
             this.tempDirBrowseBtn.Text = "Browse";
+            this.tempDirBrowseBtn.UseVisualStyleBackColor = false;
             this.tempDirBrowseBtn.Click += new System.EventHandler(this.tempDirBrowseBtn_Click);
             // 
             // tempDirCustom
@@ -1146,6 +1150,8 @@
             // debugTab
             // 
             this.debugTab.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(48)))), ((int)(((byte)(48)))), ((int)(((byte)(48)))));
+            this.debugTab.Controls.Add(this.vfrMode);
+            this.debugTab.Controls.Add(this.label48);
             this.debugTab.Controls.Add(this.ffEncPreset);
             this.debugTab.Controls.Add(this.label47);
             this.debugTab.Controls.Add(this.label46);
@@ -1222,7 +1228,7 @@
             // 
             this.label41.AutoSize = true;
             this.label41.ForeColor = System.Drawing.Color.Silver;
-            this.label41.Location = new System.Drawing.Point(308, 250);
+            this.label41.Location = new System.Drawing.Point(308, 280);
             this.label41.Margin = new System.Windows.Forms.Padding(10, 10, 10, 7);
             this.label41.Name = "label41";
             this.label41.Size = new System.Drawing.Size(423, 13);
@@ -1233,7 +1239,7 @@
             // ffprobeCountFrames
             // 
             this.ffprobeCountFrames.AutoSize = true;
-            this.ffprobeCountFrames.Location = new System.Drawing.Point(280, 250);
+            this.ffprobeCountFrames.Location = new System.Drawing.Point(280, 280);
             this.ffprobeCountFrames.Name = "ffprobeCountFrames";
             this.ffprobeCountFrames.Size = new System.Drawing.Size(15, 14);
             this.ffprobeCountFrames.TabIndex = 73;
@@ -1242,7 +1248,7 @@
             // label40
             // 
             this.label40.AutoSize = true;
-            this.label40.Location = new System.Drawing.Point(10, 250);
+            this.label40.Location = new System.Drawing.Point(10, 280);
             this.label40.Margin = new System.Windows.Forms.Padding(10, 10, 10, 7);
             this.label40.Name = "label40";
             this.label40.Size = new System.Drawing.Size(162, 13);
@@ -1277,7 +1283,7 @@
             this.ffEncThreads.Location = new System.Drawing.Point(280, 190);
             this.ffEncThreads.MinimumSize = new System.Drawing.Size(4, 21);
             this.ffEncThreads.Name = "ffEncThreads";
-            this.ffEncThreads.Size = new System.Drawing.Size(250, 21);
+            this.ffEncThreads.Size = new System.Drawing.Size(250, 20);
             this.ffEncThreads.TabIndex = 70;
             // 
             // label37
@@ -1367,6 +1373,31 @@
             this.titleLabel.TabIndex = 1;
             this.titleLabel.Text = "Settings";
             // 
+            // label48
+            // 
+            this.label48.AutoSize = true;
+            this.label48.Location = new System.Drawing.Point(10, 250);
+            this.label48.Margin = new System.Windows.Forms.Padding(10, 10, 10, 7);
+            this.label48.Name = "label48";
+            this.label48.Size = new System.Drawing.Size(88, 13);
+            this.label48.TabIndex = 79;
+            this.label48.Text = "Timestamp Mode";
+            // 
+            // vfrMode
+            // 
+            this.vfrMode.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(64)))), ((int)(((byte)(64)))), ((int)(((byte)(64)))));
+            this.vfrMode.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+            this.vfrMode.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
+            this.vfrMode.ForeColor = System.Drawing.Color.White;
+            this.vfrMode.FormattingEnabled = true;
+            this.vfrMode.Items.AddRange(new object[] {
+            "CFR (Reduplicate Or Drop Frames)",
+            "VFR (Extend Or Drop Frames)"});
+            this.vfrMode.Location = new System.Drawing.Point(280, 247);
+            this.vfrMode.Name = "vfrMode";
+            this.vfrMode.Size = new System.Drawing.Size(250, 21);
+            this.vfrMode.TabIndex = 80;
+            // 
             // SettingsForm
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
@@ -1504,5 +1535,7 @@
         private System.Windows.Forms.Label label47;
         private System.Windows.Forms.Label label46;
         private System.Windows.Forms.Label label45;
+        private System.Windows.Forms.ComboBox vfrMode;
+        private System.Windows.Forms.Label label48;
     }
 }

Code/Forms/SettingsForm.cs

@@ -77,6 +77,7 @@ namespace Flowframes.Forms
             ConfigParser.SaveGuiElement(ffEncThreads);
             ConfigParser.SaveGuiElement(ffEncPreset);
             ConfigParser.SaveGuiElement(ffprobeCountFrames);
+            ConfigParser.SaveGuiElement(vfrMode);
         }
 
         void LoadSettings()
@@ -116,6 +117,7 @@ namespace Flowframes.Forms
             ConfigParser.LoadGuiElement(ffEncThreads);
             ConfigParser.LoadGuiElement(ffEncPreset);
             ConfigParser.LoadGuiElement(ffprobeCountFrames);
+            ConfigParser.LoadGuiElement(vfrMode);
         }
 
         private void dedupThresh_Leave(object sender, EventArgs e)

Code/IO/Config.cs

@@ -49,8 +49,10 @@ namespace Flowframes.IO
                 for (int i = 0; i < cachedLines.Length; i++)
                 {
                     string[] keyValuePair = cachedLines[i].Split('|');
-                    if (keyValuePair[0] == key)
+                    if (keyValuePair[0] == key && !string.IsNullOrWhiteSpace(keyValuePair[1]))
+                    {
                         return keyValuePair[1];
+                    }
                 }
                 return WriteDefaultValIfExists(key);
             }
@@ -103,6 +105,7 @@ namespace Flowframes.IO
             // Debug / Other / Experimental
             if (key == "ffprobeCountFrames") return WriteDefault("ffprobeCountFrames", "False");
             if (key == "ffEncPreset") return WriteDefault("ffEncPreset", "medium");
+            if (key == "ffEncPreset") return WriteDefault("ffEncPreset", "medium");
             // Tile Sizes
             if (key == "tilesize_RIFE_NCNN") return WriteDefault("tilesize_RIFE_NCNN", "2048");
             if (key == "tilesize_DAIN_NCNN") return WriteDefault("tilesize_DAIN_NCNN", "512");

Code/Main/Interpolate.cs

@@ -133,6 +133,8 @@ namespace Flowframes
             if (Config.GetInt("dedupMode") == 1)
                 await MagickDedupe.Run(framesPath);
 
+            if (canceled) return;
+
             if (Config.GetInt("timingMode") == 1 && Config.GetInt("dedupMode") != 0)
                 await VfrDedupe.CreateTimecodeFile(framesPath, Config.GetBool("enableLoop"), interpFactor, firstFrameFix);
 
@@ -161,7 +163,7 @@ namespace Flowframes
                 await AiProcess.RunRifeCuda(framesPath, interpFactor);
 
             if (ai.aiName == Networks.rifeNcnn.aiName)
-                await AiProcess.RunRifeNcnn(framesPath, outpath, interpFactor, tilesize);
+                await AiProcess.RunRifeNcnnMulti(framesPath, outpath, tilesize, interpFactor);
         }
 
         public static async void GetProgressByFrameAmount(string outdir, int target)

Code/OS/AiProcess.cs

@@ -19,6 +19,7 @@ namespace Flowframes
 
         public static Process currentAiProcess;
         public static Stopwatch processTime = new Stopwatch();
+        public static Stopwatch processTimeMulti = new Stopwatch();
 
         public static int lastStartupTimeMs = 1000;
 
@@ -39,7 +40,7 @@ namespace Flowframes
             string dainDir = Path.Combine(Paths.GetPkgPath(), Path.GetFileNameWithoutExtension(Packages.dainNcnn.fileName));
             Process dain = OSUtils.NewProcess(!OSUtils.ShowHiddenCmd());
             Init(dain, 1500);
-            dain.StartInfo.Arguments = $"{OSUtils.GetHiddenCmdArg()} cd /D {dainDir.Wrap()} & dain-ncnn-vulkan.exe {args} -f {InterpolateUtils.lastExt}";
+            dain.StartInfo.Arguments = $"{OSUtils.GetCmdArg()} cd /D {dainDir.Wrap()} & dain-ncnn-vulkan.exe {args} -f {InterpolateUtils.lastExt}";
             Logger.Log("Running DAIN...", false);
             Logger.Log("cmd.exe " + dain.StartInfo.Arguments, true);
             if (!OSUtils.ShowHiddenCmd())
@@ -64,6 +65,7 @@ namespace Flowframes
 
         public static async Task RunCainNcnnMulti (string framesPath, string outPath, int tilesize, int times)
         {
+            processTimeMulti.Restart();
             Logger.Log("Running CAIN...", false);
 
             string args = $" -v -i {framesPath.Wrap()} -o {outPath.Wrap()} -t {tilesize} -g {Config.Get("ncnnGpus")}";
@@ -98,7 +100,7 @@ namespace Flowframes
             if (Interpolate.canceled) return;
             Magick.MagickDedupe.ZeroPadDir(outPath, InterpolateUtils.lastExt, 8);
 
-            Logger.Log($"Done running CAIN - Interpolation took " + FormatUtils.Time(processTime.Elapsed));
+            Logger.Log($"Done running CAIN - Interpolation took " + FormatUtils.Time(processTimeMulti.Elapsed));
             processTime.Stop();
         }
 
@@ -108,7 +110,7 @@ namespace Flowframes
             string cainExe = "cain-ncnn-vulkan.exe";
             Process cain = OSUtils.NewProcess(!OSUtils.ShowHiddenCmd());
             Init(cain, 1500);
-            cain.StartInfo.Arguments = $"{OSUtils.GetHiddenCmdArg()} cd /D {cainDir.Wrap()} & {cainExe} {args} -f {InterpolateUtils.lastExt}";
+            cain.StartInfo.Arguments = $"{OSUtils.GetCmdArg()} cd /D {cainDir.Wrap()} & {cainExe} {args} -f {InterpolateUtils.lastExt}";
             Logger.Log("cmd.exe " + cain.StartInfo.Arguments, true);
             if (!OSUtils.ShowHiddenCmd())
             {
@@ -122,7 +124,6 @@ namespace Flowframes
                 cain.BeginErrorReadLine();
             }
             while (!cain.HasExited) await Task.Delay(1);
-
         }
 
         public static async Task RunRifeCuda(string framesPath, int interpFactor)
@@ -135,7 +136,7 @@ namespace Flowframes
             Process rifePy = OSUtils.NewProcess(!OSUtils.ShowHiddenCmd());
             Init(rifePy, 3000, "png");
             string args = $" --input {framesPath.Wrap()} --times {(int)Math.Log(interpFactor, 2)}";
-            rifePy.StartInfo.Arguments = $"{OSUtils.GetHiddenCmdArg()} cd /D {rifeDir.Wrap()} & " +
+            rifePy.StartInfo.Arguments = $"{OSUtils.GetCmdArg()} cd /D {PkgUtils.GetPkgFolder(Packages.rifeCuda).Wrap()} & " +
                 $"set CUDA_VISIBLE_DEVICES={Config.Get("torchGpus")} & {Python.GetPyCmd()} {script} {args} --imgformat {InterpolateUtils.lastExt}";
             Logger.Log($"Running RIFE ({script})...", false);
             Logger.Log("cmd.exe " + rifePy.StartInfo.Arguments, true);
@@ -150,8 +151,7 @@ namespace Flowframes
                 rifePy.BeginOutputReadLine();
                 rifePy.BeginErrorReadLine();
             }
-            while (!rifePy.HasExited)
+            while (!rifePy.HasExited) await Task.Delay(1);
-                await Task.Delay(1);
             Logger.Log($"Done running RIFE - Interpolation took " + FormatUtils.Time(processTime.Elapsed));
             processTime.Stop();
         }
@@ -159,11 +159,9 @@ namespace Flowframes
         public static async Task RunRifeNcnn (string framesPath, string outPath, int interpFactor, int tilesize)
         {
             string args = $" -v -i {framesPath.Wrap()} -o {outPath.Wrap()} -t {tilesize} -g {Config.Get("ncnnGpus")} -f {InterpolateUtils.lastExt} -j 4:{Config.Get("ncnnThreads")}:4";
-
-            string dir = Path.Combine(Paths.GetPkgPath(), Path.GetFileNameWithoutExtension(Packages.rifeNcnn.fileName));
             Process rifeNcnn = OSUtils.NewProcess(!OSUtils.ShowHiddenCmd());
             Init(rifeNcnn, 750);
-            rifeNcnn.StartInfo.Arguments = $"{OSUtils.GetHiddenCmdArg()} cd /D {dir.Wrap()} & rife-ncnn-vulkan.exe {args}";
+            rifeNcnn.StartInfo.Arguments = $"{OSUtils.GetCmdArg()} cd /D {PkgUtils.GetPkgFolder(Packages.rifeNcnn).Wrap()} & rife-ncnn-vulkan.exe {args}";
             Logger.Log("Running RIFE...", false);
             Logger.Log("cmd.exe " + rifeNcnn.StartInfo.Arguments, true);
             if (!OSUtils.ShowHiddenCmd())
@@ -177,8 +175,7 @@ namespace Flowframes
                 rifeNcnn.BeginOutputReadLine();
                 rifeNcnn.BeginErrorReadLine();
             }
-            while (!rifeNcnn.HasExited)
+            while (!rifeNcnn.HasExited) await Task.Delay(1);
-                await Task.Delay(1);
 
             if (Interpolate.canceled) return;
             Magick.MagickDedupe.ZeroPadDir(outPath, InterpolateUtils.lastExt, 8);
@@ -186,6 +183,67 @@ namespace Flowframes
             processTime.Stop();
         }
 
+        public static async Task RunRifeNcnnMulti(string framesPath, string outPath, int tilesize, int times)
+        {
+            processTimeMulti.Restart();
+            Logger.Log("Running RIFE...", false);
+
+            string args = $" -v -i {framesPath.Wrap()} -o {outPath.Wrap()} -t {tilesize} -g {Config.Get("ncnnGpus")} -f {InterpolateUtils.lastExt} -j 4:{Config.Get("ncnnThreads")}:4";
+            await RunRifePartial(args);
+
+            if (times == 4 || times == 8)    // #2
+            {
+                if (Interpolate.canceled) return;
+                Logger.Log("Re-Running RIFE for 4x interpolation...", false);
+                string run1ResultsPath = outPath + "-run1";
+                IOUtils.TryDeleteIfExists(run1ResultsPath);
+                Directory.Move(outPath, run1ResultsPath);
+                Directory.CreateDirectory(outPath);
+                args = $" -v -i {run1ResultsPath.Wrap()} -o {outPath.Wrap()} -t {tilesize} -g {Config.Get("ncnnGpus")} -f {InterpolateUtils.lastExt} -j 4:{Config.Get("ncnnThreads")}:4";
+                await RunRifePartial(args);
+                Directory.Delete(run1ResultsPath, true);
+            }
+
+            if (times == 8)    // #3
+            {
+                if (Interpolate.canceled) return;
+                Logger.Log("Re-Running RIFE for 8x interpolation...", false);
+                string run2ResultsPath = outPath + "-run2";
+                IOUtils.TryDeleteIfExists(run2ResultsPath);
+                Directory.Move(outPath, run2ResultsPath);
+                Directory.CreateDirectory(outPath);
+                args = $" -v -i {run2ResultsPath.Wrap()} -o {outPath.Wrap()} -t {tilesize} -g {Config.Get("ncnnGpus")} -f {InterpolateUtils.lastExt} -j 4:{Config.Get("ncnnThreads")}:4";
+                await RunRifePartial(args);
+                Directory.Delete(run2ResultsPath, true);
+            }
+
+            if (Interpolate.canceled) return;
+            Magick.MagickDedupe.ZeroPadDir(outPath, InterpolateUtils.lastExt, 8);
+
+            Logger.Log($"Done running RIFE - Interpolation took " + FormatUtils.Time(processTimeMulti.Elapsed));
+            processTime.Stop();
+        }
+
+        static async Task RunRifePartial(string args)
+        {
+            Process rifeNcnn = OSUtils.NewProcess(!OSUtils.ShowHiddenCmd());
+            Init(rifeNcnn, 1500);
+            rifeNcnn.StartInfo.Arguments = $"{OSUtils.GetCmdArg()} cd /D {PkgUtils.GetPkgFolder(Packages.rifeNcnn).Wrap()} & rife-ncnn-vulkan.exe {args} -f {InterpolateUtils.lastExt} -j 4:{Config.Get("ncnnThreads")}:4";
+            Logger.Log("cmd.exe " + rifeNcnn.StartInfo.Arguments, true);
+            if (!OSUtils.ShowHiddenCmd())
+            {
+                rifeNcnn.OutputDataReceived += (sender, outLine) => { LogOutput("[O] " + outLine.Data, "rife-ncnn-log.txt"); };
+                rifeNcnn.ErrorDataReceived += (sender, outLine) => { LogOutput("[E] " + outLine.Data, "rife-ncnn-log.txt"); };
+            }
+            rifeNcnn.Start();
+            if (!OSUtils.ShowHiddenCmd())
+            {
+                rifeNcnn.BeginOutputReadLine();
+                rifeNcnn.BeginErrorReadLine();
+            }
+            while (!rifeNcnn.HasExited) await Task.Delay(1);
+        }
+
         static void LogOutput (string line, string logFilename)
         {
             if (string.IsNullOrWhiteSpace(line))

Code/OS/OSUtils.cs

@@ -81,7 +81,7 @@ namespace Flowframes.OS
             }
         }
 
-        public static string GetHiddenCmdArg()
+        public static string GetCmdArg()
         {
             bool stayOpen = Config.GetInt("cmdDebugMode") == 2;
             if (stayOpen)

Code/packages.config

@@ -13,9 +13,16 @@
   <package id="Microsoft-WindowsAPICodePack-Core" version="1.1.4" targetFramework="net472" />
   <package id="Microsoft-WindowsAPICodePack-Shell" version="1.1.4" targetFramework="net472" />
   <package id="NvAPIWrapper.Net" version="0.8.0.98" targetFramework="net472" />
+  <package id="OpenCvSharp4" version="4.5.0.20201013" targetFramework="net472" />
+  <package id="OpenCvSharp4.runtime.win" version="4.5.0.20201013" targetFramework="net472" />
+  <package id="OpenCvSharp4.Windows" version="4.5.0.20201013" targetFramework="net472" />
   <package id="PagedControl" version="2.2.0" targetFramework="net472" />
+  <package id="System.Buffers" version="4.5.1" targetFramework="net472" />
   <package id="System.Drawing.Common" version="5.0.0" targetFramework="net472" />
   <package id="System.Management" version="5.0.0" targetFramework="net472" />
+  <package id="System.Memory" version="4.5.4" targetFramework="net472" />
+  <package id="System.Numerics.Vectors" version="4.5.0" targetFramework="net472" />
+  <package id="System.Runtime.CompilerServices.Unsafe" version="4.7.1" targetFramework="net472" />
   <package id="System.Security.Claims" version="4.3.0" targetFramework="net472" />
   <package id="System.Security.Principal.Windows" version="4.3.0" targetFramework="net472" />
   <package id="TabControl" version="2.1.2" targetFramework="net472" />