feat: log level config

feat: ffmpeg args placeholder

config/config.go

@@ -24,7 +24,8 @@ type InputItem struct {
 }
 
 type LogConfig struct {
-	PlayState bool `json:"play_state"`
+	Level     string `json:"level"`
+	PlayState bool   `json:"play_state"`
 }
 
 type ServerConfig struct {
@@ -42,10 +43,10 @@ type Config struct {
 	Server     ServerConfig   `json:"server"`
 }
 
-var GlobalConfig Config
+var GlobalConfig *Config
 
 func init() {
-	GlobalConfig = Config{}
+	GlobalConfig = &Config{}
 	err := readConfig("config.json")
 	if len(GlobalConfig.Input) == 0 {
 		log.Fatal("No input video found")
@@ -91,9 +92,16 @@ func validateConfig() error {
 	if err := validateServerConfig(); err != nil {
 		return err
 	}
+	validateLogConfig()
 	return nil
 }
 
+func validateLogConfig() {
+	if GlobalConfig.Log.Level == "" {
+		GlobalConfig.Log.Level = "info"
+	}
+}
+
 func validateInputConfig() error {
 	if GlobalConfig.Input == nil {
 		return errors.New("video_path is nil")