Add GetFFplayVersion method to retrieve FFplay version details

Extended `FFplayContract` with `GetVersion` to fetch FFplay version. Implemented version extraction in `utilities` and `ffplay` to support version retrieval functionality.

internal/ffmpeg/ffplay.go

@@ -5,11 +5,13 @@ import (
 	"fyne.io/fyne/v2/lang"
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/utils"
 	"os/exec"
+	"regexp"
 	"strings"
 )
 
 type FFplayContract interface {
 	GetPath() string
+	GetVersion() (string, error)
 	Play(file *File) error
 }
 
@@ -39,6 +41,17 @@ func (f *ffplay) GetPath() string {
 	return f.path
 }
 
+func (f *ffplay) GetVersion() (string, error) {
+	cmd := exec.Command(f.path, "-version")
+	utils.PrepareBackgroundCommand(cmd)
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		return "", err
+	}
+	text := regexp.MustCompile("\r?\n").Split(strings.TrimSpace(string(out)), -1)
+	return text[0], nil
+}
+
 func (f *ffplay) Play(file *File) error {
 	args := []string{file.Path}
 	cmd := exec.Command(f.GetPath(), args...)

internal/ffmpeg/utilities.go

@@ -34,6 +34,7 @@ type UtilitiesContract interface {
 	ChangeFFprobe(path string) error
 
 	GetFFplay() (FFplayContract, error)
+	GetFFplayVersion() string
 	GetFFplayPath() string
 	ChangeFFplay(path string) error
 }
@@ -182,6 +183,19 @@ func (u *utilities) GetFFplay() (FFplayContract, error) {
 	return u.ffplay, nil
 }
 
+func (u *utilities) GetFFplayVersion() string {
+	ffplayService, err := u.GetFFplay()
+	if err != nil {
+		return lang.L("errorFFplayVersion")
+	}
+
+	ffplayVersion, err := ffplayService.GetVersion()
+	if err != nil {
+		return lang.L("errorFFplayVersion")
+	}
+	return ffplayVersion
+}
+
 func (u *utilities) GetFFplayPath() string {
 	ffplayService, err := u.GetFFplay()
 	if err != nil {