diff --git a/revid/Revid.go b/revid/Revid.go
index b4255861..29ca2e9c 100644
--- a/revid/Revid.go
+++ b/revid/Revid.go
@@ -115,6 +115,7 @@ type revid struct {
 	sendClip       func(clip []byte) error
 	rtmpInst       rtmp.RTMPSession
 	mutex          sync.Mutex
+	sendMutex      sync.Mutex
 	currentBitrate int64
 }
 
@@ -124,6 +125,7 @@ type revid struct {
 func NewRevid(config Config) (r *revid, err error) {
 	r = new(revid)
 	r.mutex = sync.Mutex{}
+	r.sendMutex = sync.Mutex{}
 	r.ringBuffer = ringbuffer.NewRingBuffer(ringBufferSize, ringBufferElementSize)
 	err = r.changeState(config)
 	if err != nil {
@@ -280,6 +282,9 @@ func (r *revid) Stop() {
 	}
 
 	r.Log(Info, "Stopping revid!")
+	// wait for sending to finish
+	r.sendMutex.Lock()
+	defer r.sendMutex.Unlock()
 	r.rtmpInst.EndSession()
 	r.isRunning = false
 
@@ -463,8 +468,8 @@ func (r *revid) outputClips() {
 
 // senClipToFile writes the passed clip to a file
 func (r *revid) sendClipToFile(clip []byte) error {
-	r.mutex.Lock()
-	defer r.mutex.Unlock()
+	r.sendMutex.Lock()
+	defer r.sendMutex.Unlock()
 	_, err := r.outputFile.Write(clip)
 	if err != nil {
 		return err
@@ -474,8 +479,8 @@ func (r *revid) sendClipToFile(clip []byte) error {
 
 // sendClipToHTTP takes a clip and an output url and posts through http.
 func (r *revid) sendClipToHTTP(clip []byte) error {
-	r.mutex.Lock()
-	defer r.mutex.Unlock()
+	r.sendMutex.Lock()
+	defer r.sendMutex.Unlock()
 	timeout := time.Duration(httpTimeOut * time.Second)
 	client := http.Client{Timeout: timeout}
 	url := r.config.HttpAddress + strconv.Itoa(len(clip))
@@ -497,8 +502,8 @@ func (r *revid) sendClipToHTTP(clip []byte) error {
 // sendClipToFfmpegRtmp sends the clip over the current rtmp connection using
 // an ffmpeg process.
 func (r *revid) sendClipToFfmpegRtmp(clip []byte) (err error) {
-	r.mutex.Lock()
-	defer r.mutex.Unlock()
+	r.sendMutex.Lock()
+	defer r.sendMutex.Unlock()
 	_, err = r.ffmpegStdin.Write(clip)
 	return
 }
@@ -506,8 +511,8 @@ func (r *revid) sendClipToFfmpegRtmp(clip []byte) (err error) {
 // sendClipToLibRtmp send the clip over the current rtmp connection using the
 // c based librtmp library
 func (r *revid) sendClipToLibRtmp(clip []byte) (err error) {
-	r.mutex.Lock()
-	defer r.mutex.Unlock()
+	r.sendMutex.Lock()
+	defer r.sendMutex.Unlock()
 	err = r.rtmpInst.WriteFrame(clip, uint(len(clip)))
 	return
 }