diff --git a/example/file/main.go b/example/file/main.go
new file mode 100644
index 0000000..d2ca5f3
--- /dev/null
+++ b/example/file/main.go
@@ -0,0 +1,43 @@
+package main
+
+import (
+	"net/http"
+
+	"github.com/Danile71/go-logger"
+	"github.com/Danile71/go-rtsp"
+	"github.com/gorilla/mux"
+	"github.com/mattn/go-mjpeg"
+)
+
+const uri = "./sample.mp4"
+
+func main() {
+	s := mjpeg.NewStream()
+
+	stream, err := rtsp.Open(uri)
+	if logger.OnError(err) {
+		return
+	}
+
+	go func() {
+		for {
+			pkt, err := stream.ReadPacket()
+			if logger.OnError(err) {
+				continue
+			}
+
+			if pkt.IsVideo() {
+				s.Update(pkt.Data())
+			}
+		}
+	}()
+
+	streamHandler := func(w http.ResponseWriter, r *http.Request) {
+		s.ServeHTTP(w, r)
+	}
+
+	router := mux.NewRouter()
+	router.HandleFunc("/stream", streamHandler)
+	http.Handle("/", router)
+	http.ListenAndServe(":8181", nil)
+}
diff --git a/example/file/sample.mp4 b/example/file/sample.mp4
new file mode 100644
index 0000000..24b738c
Binary files /dev/null and b/example/file/sample.mp4 differ
diff --git a/ffmpeg.go b/ffmpeg.go
index 3a5b230..669a789 100644
--- a/ffmpeg.go
+++ b/ffmpeg.go
@@ -6,6 +6,7 @@ package rtsp
 */
 import "C"
 
+// Init old version's ffmpeg
 func init() {
 	C.ffmpeginit()
 }
diff --git a/pkt.go b/pkt.go
index 6b70f26..06fbd51 100644
--- a/pkt.go
+++ b/pkt.go
@@ -7,26 +7,33 @@ type Packet struct {
 	streamIndex int
 	codecType   int
 	data        []byte
-	width       int
-	height      int
+
+	// only image
+	width  int
+	height int
 }
 
+// Height if image or 0 if audio
 func (pkt *Packet) Height() int {
 	return pkt.height
 }
 
+// Width if image or 0 if audio
 func (pkt *Packet) Width() int {
 	return pkt.width
 }
 
+// Data encoded jpeg if image or wav if audio
 func (pkt *Packet) Data() []byte {
 	return pkt.data
 }
 
+// IsAudio packet
 func (pkt *Packet) IsAudio() bool {
 	return pkt.codecType == C.AVMEDIA_TYPE_AUDIO
 }
 
+// IsVideo packet
 func (pkt *Packet) IsVideo() bool {
 	return pkt.codecType == C.AVMEDIA_TYPE_VIDEO
 }
diff --git a/rtsp.go b/rtsp.go
index f7e7ef5..18994fa 100644
--- a/rtsp.go
+++ b/rtsp.go
@@ -1,5 +1,6 @@
 package rtsp
 
+// Open rtsp stream of file
 func Open(url string) (*Stream, error) {
 	stream := New(url)
 	return stream, stream.Setup(Auto)
diff --git a/stream.go b/stream.go
index 0fbef01..aebfde9 100644
--- a/stream.go
+++ b/stream.go
@@ -6,6 +6,7 @@ package rtsp
 import "C"
 import (
 	"fmt"
+	"io"
 	"runtime"
 	"sync"
 	"unsafe"
@@ -138,7 +139,11 @@ func (stream *Stream) ReadPacket() (pkt *Packet, err error) {
 	defer C.av_packet_unref(&packet)
 
 	if cerr := C.av_read_frame(stream.formatCtx, &packet); int(cerr) != 0 {
-		err = fmt.Errorf("ffmpeg: av_read_frame failed: %d", cerr)
+		if cerr == C.AVERROR_EOF {
+			err = io.EOF
+		} else {
+			err = fmt.Errorf("ffmpeg: av_read_frame failed: %d", cerr)
+		}
 		return
 	}