Add apple encoder and fix extra_hw_frames bug (#4986)

* Fixes format in full hw encoding to nv12 for cuda, vaapi and qsv now
* Remove extra_hw_frames
* Add apple transcoder support
* Up the duration to discover decoding errors
* yuv420p is not supported on intel
---------
Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

pkg/ffmpeg/ffmpeg_test.go

@@ -0,0 +1,75 @@
+// Package ffmpeg provides a wrapper around the ffmpeg and ffprobe executables.
+package ffmpeg
+
+import "testing"
+
+func TestFFMpegVersion_GreaterThan(t *testing.T) {
+	tests := []struct {
+		name  string
+		this  FFMpegVersion
+		other FFMpegVersion
+		want  bool
+	}{
+		{
+			"major greater, minor equal, patch equal",
+			FFMpegVersion{2, 0, 0},
+			FFMpegVersion{1, 0, 0},
+			true,
+		},
+		{
+			"major greater, minor less, patch less",
+			FFMpegVersion{2, 1, 1},
+			FFMpegVersion{1, 0, 0},
+			true,
+		},
+		{
+			"major equal, minor greater, patch equal",
+			FFMpegVersion{1, 1, 0},
+			FFMpegVersion{1, 0, 0},
+			true,
+		},
+		{
+			"major equal, minor equal, patch greater",
+			FFMpegVersion{1, 0, 1},
+			FFMpegVersion{1, 0, 0},
+			true,
+		},
+		{
+			"major equal, minor equal, patch equal",
+			FFMpegVersion{1, 0, 0},
+			FFMpegVersion{1, 0, 0},
+			true,
+		},
+		{
+			"major less, minor equal, patch equal",
+			FFMpegVersion{1, 0, 0},
+			FFMpegVersion{2, 0, 0},
+			false,
+		},
+		{
+			"major equal, minor less, patch equal",
+			FFMpegVersion{1, 0, 0},
+			FFMpegVersion{1, 1, 0},
+			false,
+		},
+		{
+			"major equal, minor equal, patch less",
+			FFMpegVersion{1, 0, 0},
+			FFMpegVersion{1, 0, 1},
+			false,
+		},
+		{
+			"major less, minor less, patch less",
+			FFMpegVersion{1, 0, 0},
+			FFMpegVersion{2, 1, 1},
+			false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := tt.this.Gteq(tt.other); got != tt.want {
+				t.Errorf("FFMpegVersion.GreaterThan() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}