diff --git a/revid/revid.go b/revid/revid.go
index 546d7ff9..b3380dd5 100644
--- a/revid/revid.go
+++ b/revid/revid.go
@@ -48,31 +48,33 @@ import (
 	"bitbucket.org/ausocean/utils/ring"
 )
 
-// Misc constants
+// Ring buffer sizes and read/write timeouts.
 const (
-	clipDuration            = 1 * time.Second
-	mp2tPacketSize          = 188                                    // MPEG-TS packet size
-	mp2tMaxPackets          = int(clipDuration * 2016 / time.Second) // # first multiple of 7 and 8 greater than 2000
-	ringBufferSize          = 10000
-	ringBufferElementSize   = 150000
-	writeTimeout            = 10 * time.Millisecond
-	readTimeout             = 10 * time.Millisecond
-	httpTimeout             = 5 * time.Second
-	bitrateTime             = 1 * time.Minute
-	mjpegParserInChanLen    = 100000
-	ffmpegPath              = "/usr/local/bin/ffmpeg"
-	rtmpConnectionTimout    = 10
-	outputChanSize          = 1000
-	cameraRetryPeriod       = 5 * time.Second
-	sendFailedDelay         = 5 * time.Millisecond
-	maxSendFailedErrorCount = 500
-	clipSizeThreshold       = 11
-	rtmpConnectionMaxTries  = 5
-	raspividNoOfTries       = 3
-	sendingWaitTime         = 5 * time.Millisecond
-	pkg                     = "revid:"
+	ringBufferSize        = 10000
+	ringBufferElementSize = 150000
+	writeTimeout          = 10 * time.Millisecond
+	readTimeout           = 10 * time.Millisecond
 )
 
+// RTMP connection properties.
+const (
+	rtmpConnectionMaxTries = 5
+	rtmpConnectionTimeout  = 10
+)
+
+// Duration of video for each clip sent out.
+const clipDuration = 1 * time.Second
+
+// Time duration between bitrate checks.
+const bitrateTime = 1 * time.Minute
+
+// After a send fail, this is the delay before another send.
+const sendFailedDelay = 5 * time.Millisecond
+
+const ffmpegPath = "/usr/local/bin/ffmpeg"
+
+const pkg = "revid:"
+
 type Logger interface {
 	SetLevel(int8)
 	Log(level int8, message string, params ...interface{})
@@ -211,7 +213,7 @@ func (r *Revid) reset(config Config) error {
 			}
 			r.destination[outNo] = s
 		case Rtmp:
-			s, err := newRtmpSender(config.RtmpUrl, rtmpConnectionTimout, rtmpConnectionMaxTries, r.config.Logger.Log)
+			s, err := newRtmpSender(config.RtmpUrl, rtmpConnectionTimeout, rtmpConnectionMaxTries, r.config.Logger.Log)
 			if err != nil {
 				return err
 			}