Add CBR, VBR, and CQP Bitrate Control Options and Dynamic UI Generation

Util/FFmpeg/VideoFFmpeg.cs

@@ -1,5 +1,6 @@
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
+using ADOFAIRenderer.Core;
 
 namespace ADOFAIRenderer.Util.FFmpeg
 {
@@ -55,14 +56,49 @@ namespace ADOFAIRenderer.Util.FFmpeg
             VideoCodec = codec;
         }
 
-        public void Start(string path, float bitrate)
+        public void Start(string path, RenderManager.BitrateControlMode mode, int bitrate, int maxBitrate, int qp)
         {
             if (File.Exists(path))
             {
                 File.Delete(path);
             }
-            var command = "-y -f rawvideo -vcodec rawvideo -pixel_format rgba -colorspace rgb -color_range 2 -video_size " + Width + "x" + Height + " -framerate " + FrameRate + " -threads 4 -loglevel quiet -i - " + Codec2String(VideoCodec) + " -pix_fmt yuv420p -fps_mode cfr " + " -r " + VideoFPS + $" -b:v {(int)bitrate}k" + " \"" + path + "\"";
+
+            string bitrateArgs = mode switch
+            {
+                RenderManager.BitrateControlMode.CBR => $"-b:v {bitrate}k -minrate {bitrate}k -maxrate {bitrate}k -bufsize {bitrate * 2}k",
+                RenderManager.BitrateControlMode.VBR => $"-b:v {bitrate}k -maxrate {maxBitrate}k -bufsize {maxBitrate * 2}k",
+                RenderManager.BitrateControlMode.CQP => GetCqpArgs(VideoCodec, qp),
+                _ => $"-b:v {bitrate}k"
+            };
+
+            var command = "-y -f rawvideo -vcodec rawvideo -pixel_format rgba -colorspace rgb -color_range 2 -video_size " + 
+                          Width + "x" + Height + " -framerate " + FrameRate + " -threads 4 -loglevel quiet -i - " + 
+                          Codec2String(VideoCodec) + " " + bitrateArgs + " -pix_fmt yuv420p -fps_mode cfr -r " + 
+                          VideoFPS + " \"" + path + "\"";
+                          
             Execute(command);
         }
+
+        private static string GetCqpArgs(Codec codec, int qp)
+        {
+            return codec switch
+            {
+                Codec.H264_NVIDIA => $"-rc constqp -qp {qp}",
+                Codec.HEVC_NVIDIA => $"-rc constqp -qp {qp}",
+                Codec.AV1_NVIDIA => $"-rc constqp -qp {qp}",
+                Codec.VP9_NVIDIA => $"-rc constqp -qp {qp}",
+
+                Codec.H264_QSV => $"-global_quality {qp}",
+                Codec.HEVC_QSV => $"-global_quality {qp}",
+                Codec.AV1_QSV => $"-global_quality {qp}",
+
+                Codec.H264_Default => $"-crf {qp}",
+                Codec.HEVC_Default => $"-crf {qp}",
+                Codec.AV1_Default => $"-crf {qp}",
+                Codec.VP9_Default => $"-crf {qp}",
+
+                _ => $"-qp {qp}"
+            };
+        }
     }
 }