Add detection of container/video_codec/audio_codec compatibility for live file streaming or transcoding (#384)

* add forceMKV, forceHEVC config options
* drop audio stream instead of trying to transcode for ffmpeg unsupported/unknown audio codecs

pkg/manager/config/config.go

@@ -55,6 +55,10 @@ const AutostartVideo = "autostart_video"
 const ShowStudioAsText = "show_studio_as_text"
 const CSSEnabled = "cssEnabled"
 
+// Playback force codec,container
+const ForceMKV = "forceMKV"
+const ForceHEVC = "forceHEVC"
+
 // Logging options
 const LogFile = "logFile"
 const LogOut = "logOut"
@@ -291,6 +295,15 @@ func GetCSSEnabled() bool {
 	return viper.GetBool(CSSEnabled)
 }
 
+// force codec,container
+func GetForceMKV() bool {
+	return viper.GetBool(ForceMKV)
+}
+
+func GetForceHEVC() bool {
+	return viper.GetBool(ForceHEVC)
+}
+
 // GetLogFile returns the filename of the file to output logs to.
 // An empty string means that file logging will be disabled.
 func GetLogFile() string {