split ffmpeg install helpers

internal/service/ffmpeg_status.go

@@ -0,0 +1,57 @@
+package service
+
+import (
+	"bytes"
+	"os"
+	"os/exec"
+	"runtime"
+)
+
+// CheckFFmpegStatus 检查 ffmpeg/ffprobe 状态 (供 API 使用)
+func CheckFFmpegStatus(ffprobePath, ffmpegPath string) map[string]interface{} {
+	status := map[string]interface{}{
+		"ffprobe_installed": false,
+		"ffmpeg_installed":  false,
+		"auto_installable":  runtime.GOOS == "windows",
+	}
+
+	if ffprobePath != "" {
+		if _, err := os.Stat(ffprobePath); err == nil {
+			status["ffprobe_installed"] = true
+			status["ffprobe_path"] = ffprobePath
+
+			// 获取版本
+			cmd := exec.Command(ffprobePath, "-version")
+			out, err := cmd.Output()
+			if err == nil {
+				// 提取版本信息（第一行）
+				lines := bytes.Split(out, []byte("\n"))
+				if len(lines) > 0 {
+					version := string(bytes.TrimSpace(lines[0]))
+					status["ffprobe_version"] = version
+					status["ffprobe_security"] = EvaluateFFmpegSecurity(version)
+				}
+			}
+		}
+	}
+
+	if ffmpegPath != "" {
+		if _, err := os.Stat(ffmpegPath); err == nil {
+			status["ffmpeg_installed"] = true
+			status["ffmpeg_path"] = ffmpegPath
+
+			cmd := exec.Command(ffmpegPath, "-version")
+			out, err := cmd.Output()
+			if err == nil {
+				lines := bytes.Split(out, []byte("\n"))
+				if len(lines) > 0 {
+					version := string(bytes.TrimSpace(lines[0]))
+					status["ffmpeg_version"] = version
+					status["ffmpeg_security"] = EvaluateFFmpegSecurity(version)
+				}
+			}
+		}
+	}
+
+	return status
+}