Fix GIF hue shift issues

Code/Data/VidExtraData.cs

@@ -1,6 +1,5 @@
 using Flowframes.IO;
 using System;
-using System.Collections.Generic;
 using System.Linq;
 
 namespace Flowframes.Data
@@ -19,6 +18,8 @@ namespace Flowframes.Data
         private readonly string[] validColorSpaces = new string[] { "bt709", "bt470m", "bt470bg", "smpte170m", "smpte240m", "linear", "log100",
             "log316", "iec61966-2-4", "bt1361e", "iec61966-2-1", "bt2020-10", "bt2020-12", "smpte2084", "smpte428", "arib-std-b67" };
 
+        public VidExtraData () { }
+
         public VidExtraData(string ffprobeOutput)
         {
             string[] lines = ffprobeOutput.SplitIntoLines();

Code/Main/Export.cs

@@ -82,7 +82,8 @@ namespace Flowframes.Main
             Fraction maxFps = max.Contains("/") ? new Fraction(max) : new Fraction(max.GetFloat());
             bool fpsLimit = maxFps.GetFloat() > 0f && s.outFps.GetFloat() > maxFps.GetFloat();
 
-            VidExtraData extraData = await FfmpegCommands.GetVidExtraInfo(s.inPath);
+            bool gifInput = I.currentMediaFile.Format.Upper() == "GIF"; // If input is GIF, we don't need to check the color space etc
+            VidExtraData extraData = gifInput ? new VidExtraData() : await FfmpegCommands.GetVidExtraInfo(s.inPath);
             string extraArgsIn = await FfmpegEncode.GetFfmpegExportArgsIn(s.outFps, s.outItsScale);
             string extraArgsOut = await FfmpegEncode.GetFfmpegExportArgsOut(fpsLimit ? maxFps : new Fraction(), extraData, s.outSettings);
 

Code/Media/FfmpegExtract.cs

@@ -49,7 +49,8 @@ namespace Flowframes.Media
 
             if (Interpolate.currentMediaFile != null && Interpolate.currentMediaFile.VideoStreams.Any())
             {
-                pixFmt = Interpolate.currentMediaFile.VideoStreams.First().PixelFormat.Lower();
+                pixFmt = Interpolate.currentMediaFile.VideoStreams.First().PixelFormat;
+                pixFmt = SimplifyPixFmt(pixFmt);
             }
 
             bool inputHighBitDepth = pixFmt.Contains("p10") || pixFmt.Contains("p16");
@@ -65,7 +66,7 @@ namespace Flowframes.Media
             else if (extension == "jpg")
             {
                 // Fallback to YUV420P if not in list of supported formats
-                if (!new[] { "yuvj420p", "yuvj422p", "yuvj444p", "yuv420p", "yuv422p", "yuv444p" }.Contains(pixFmt))
+                if (!new[] { "yuv420p", "yuv422p", "yuv444p" }.Contains(pixFmt))
                 {
                     pixFmt = "yuv420p";
                 }
@@ -97,6 +98,14 @@ namespace Flowframes.Media
             return args;
         }
 
+        private static string SimplifyPixFmt (string pixFmt)
+        {
+            pixFmt = pixFmt.Lower();
+            pixFmt = pixFmt.Replace("yuvj", "yuv");
+            pixFmt = pixFmt.Replace("bgra", "rgba");
+            return pixFmt;
+        }
+
         public static async Task VideoToFrames(string inputFile, string framesDir, bool alpha, Fraction rate, bool deDupe, bool delSrc, Size size, string format)
         {
             Logger.Log("Extracting video frames from input video...");

Code/Os/VapourSynthUtils.cs

@@ -98,7 +98,8 @@ namespace Flowframes.Os
             if (s.Dedupe && !s.Realtime)
                 l.Add(GetRedupeLines(s));
 
-            l.Add($"clip = vs.core.resize.Bicubic(clip, format=vs.YUV444P16, matrix_s={(loadFrames ? "'470bg'" : "cMatrix")})"); // Convert RGB to YUV. Always use 470bg if input is frames
+            bool use470bg = loadFrames && Interpolate.currentMediaFile.Format.Upper() != "GIF";
+            l.Add($"clip = vs.core.resize.Bicubic(clip, format=vs.YUV444P16, matrix_s={(use470bg ? "'470bg'" : "cMatrix")})"); // Convert RGB to YUV. Always use 470bg if input is YUV frames
 
             if (!s.Dedupe) // Ignore trimming code when using deduping that that already handles trimming in the frame order file
             {