Made it so that you can play files through FFplay.

internal/ffmpeg/utilities.go

@@ -4,8 +4,22 @@ import (
 	"errors"
 	"fyne.io/fyne/v2/lang"
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/application/setting"
+	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/ffmpeg/encoder"
 )
 
+type File struct {
+	Path string
+	Name string
+	Ext  string
+}
+
+type ConvertSetting struct {
+	VideoFileInput       File
+	VideoFileOut         File
+	OverwriteOutputFiles bool
+	Encoder              encoder.EncoderContract
+}
+
 type UtilitiesContract interface {
 	UtilityCheck() bool