Added the ability to get the FFmpeg version.

internal/ffmpeg/ffmpeg.go

@@ -7,6 +7,7 @@ import (
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/utils"
 	"io"
 	"os/exec"
+	"regexp"
 	"strings"
 )
 
@@ -17,6 +18,7 @@ type ProgressContract interface {
 
 type FFmpegContract interface {
 	GetPath() string
+	GetFFmpegVersion() (string, error)
 	GetEncoders(scanner func(scanner *bufio.Reader)) error
 	RunConvert(setting ConvertSetting, progress ProgressContract, beforeWait func(cmd *exec.Cmd), afterWait func(cmd *exec.Cmd)) error
 }
@@ -47,6 +49,17 @@ func (f *ffmpeg) GetPath() string {
 	return f.path
 }
 
+func (f *ffmpeg) GetFFmpegVersion() (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 *ffmpeg) RunConvert(setting ConvertSetting, progress ProgressContract, beforeWait func(cmd *exec.Cmd), afterWait func(cmd *exec.Cmd)) error {
 	overwriteOutputFiles := "-n"
 	if setting.OverwriteOutputFiles == true {