Fixed GetHash file lock, AE safety buffers in config, increased to 90 for ncnn

Code/IO/IOUtils.cs

@@ -558,23 +558,29 @@ namespace Flowframes.IO
             }
             try
             {
+				var stream = File.OpenRead(path);
+
 				if (hashType == Hash.MD5)
 				{
 					MD5 md5 = MD5.Create();
-					var hash = md5.ComputeHash(File.OpenRead(path));
+					var hash = md5.ComputeHash(stream);
 					hashStr = BitConverter.ToString(hash).Replace("-", "").ToLowerInvariant();
 				}
+
 				if (hashType == Hash.CRC32)
 				{
 					var crc = new Crc32Algorithm();
-					var crc32bytes = crc.ComputeHash(File.OpenRead(path));
+					var crc32bytes = crc.ComputeHash(stream);
 					hashStr = BitConverter.ToUInt32(crc32bytes, 0).ToString();
 				}
+
 				if (hashType == Hash.xxHash)
 				{
-					ulong xxh64 = xxHash64.ComputeHash(File.OpenRead(path), 8192, (ulong)GetFilesize(path));
+					ulong xxh64 = xxHash64.ComputeHash(stream, 8192, (ulong)GetFilesize(path));
 					hashStr = xxh64.ToString();
 				}
+
+				stream.Close();
 			}
 			catch (Exception e)
             {

Code/IO/ModelDownloader.cs

@@ -41,6 +41,7 @@ namespace Flowframes.IO
         static async Task DownloadTo (string url, string saveDir, int retries = 3)
         {
             string savePath = Path.Combine(saveDir, Path.GetFileName(url));
+            IOUtils.TryDeleteIfExists(savePath);
             Logger.Log($"Downloading '{url}' to '{savePath}'", true);
             Stopwatch sw = new Stopwatch();
             sw.Restart();
@@ -68,6 +69,7 @@ namespace Flowframes.IO
                 if (Interpolate.canceled)
                 {
                     client.CancelAsync();
+                    client.Dispose();
                     return;
                 }
                 if (sw.ElapsedMilliseconds > 6000)
@@ -106,7 +108,7 @@ namespace Flowframes.IO
 
                 foreach (KeyValuePair<string, string> modelFile in fileList)
                     await DownloadTo(GetMdlFileUrl(ai, model, modelFile.Key), mdlDir);
-
+ 
                 Logger.Log($"Downloaded \"{model}\" model files.", false, true);
             }
             catch (Exception e)
@@ -174,7 +176,7 @@ namespace Flowframes.IO
                 string md5 = IOUtils.GetHash(Path.Combine(mdlDir, file.Key), IOUtils.Hash.MD5);
                 if (md5.Trim() != file.Value.Trim())
                 {
-                    Logger.Log($"Files for model {model} not valid: Local MD5 ({md5.Trim()}) does not equal validation MD5 ({file.Value.Trim()}).", true);
+                    Logger.Log($"Files for model {model} not valid: MD5 of {file.Key} ({md5.Trim()}) does not equal validation MD5 ({file.Value.Trim()}).", true);
                     return false;
                 }
             }

Code/Main/AutoEncode.cs

@@ -27,7 +27,8 @@ namespace Flowframes.Main
         public static void UpdateChunkAndBufferSizes ()
         {
             chunkSize = GetChunkSize(IOUtils.GetAmountOfFiles(Interpolate.current.framesFolder, false, "*.png") * Interpolate.current.interpFactor);
-            safetyBufferFrames = Interpolate.current.ai.aiName.ToUpper().Contains("NCNN") ? 60 : 30;    // Use bigger safety buffer for NCNN
+            bool isNcnn = Interpolate.current.ai.aiName.ToUpper().Contains("NCNN");
+            safetyBufferFrames = isNcnn ? Config.GetInt("autoEncSafeBufferNcnn", 90) : Config.GetInt("autoEncSafeBufferCuda", 30);    // Use bigger safety buffer for NCNN
         }
 
         public static async Task MainLoop(string interpFramesPath)

Code/Main/Interpolate.cs

@@ -43,17 +43,14 @@ namespace Flowframes
             currentInputFrameCount = await Utils.GetInputFrameCountAsync(current.inPath);
             Program.mainForm.SetStatus("Starting...");
             Program.mainForm.SetWorking(true);
-            await Task.Delay(10);
             if (!current.inputIsFrames)        // Input is video - extract frames first
                 await ExtractFrames(current.inPath, current.framesFolder);
             else
                 await FFmpegCommands.ImportImages(current.inPath, current.framesFolder, await Utils.GetOutputResolution(current.inPath, true));
             if (canceled) return;
             sw.Restart();
-            await Task.Delay(10);
             await PostProcessFrames();
             if (canceled) return;
-            Program.mainForm.SetStatus("Running AI...");
             await RunAi(current.interpFolder, current.ai);
             if (canceled) return;
             Program.mainForm.SetProgress(100);
@@ -135,6 +132,7 @@ namespace Flowframes
 
         public static async Task RunAi(string outpath, AI ai, bool stepByStep = false)
         {
+            Program.mainForm.SetStatus("Downloading models...");
             await ModelDownloader.DownloadModelFiles(Path.GetFileNameWithoutExtension(ai.pkg.fileName), current.model);
             if (canceled) return;
 
@@ -156,6 +154,7 @@ namespace Flowframes
                 tasks.Add(AutoEncode.MainLoop(outpath));
             }
 
+            Program.mainForm.SetStatus("Running AI...");
             await Task.WhenAll(tasks);
         }
 

Code/Main/InterpolateUtils.cs

@@ -354,7 +354,7 @@ namespace Flowframes.Main
             }
         }
 
-        public static int RoundDiv2(int n)     // Round to a number that's divisible by 2 (for h264)
+        public static int RoundDiv2(int n)     // Round to a number that's divisible by 2 (for h264 etc)
         {
             int a = (n / 2) * 2;    // Smaller multiple
             int b = a + 2;   // Larger multiple