diff --git a/revid/config/config.go b/revid/config/config.go
index ed1bb700..c14c1f9b 100644
--- a/revid/config/config.go
+++ b/revid/config/config.go
@@ -132,9 +132,13 @@ type Config struct {
 	// InputV4l:
 	//		Read from webcam.
 	// InputFile:
+	//		Read h.264 bytestream from a file.
 	// 		Location must be specified in InputPath field.
 	// InputRTSP:
+	//		Read from a camera supporting RTSP communication.
 	//		CameraIP should also be defined.
+	// InputAudio:
+	//		Read from a ALSA audio source.
 	Input uint8
 
 	// InputCodec defines the input codec we wish to use, and therefore defines the