From 7f799ffea8e68c7f5c50493c2abeaf451ce1ee9e Mon Sep 17 00:00:00 2001
From: aler9 <46489434+aler9@users.noreply.github.com>
Date: Sat, 19 Feb 2022 15:11:37 +0100
Subject: [PATCH] add client-read-republish example (#91)

---
 README.md                                     |  1 +
 .../client-read-h264-convert-to-jpeg/main.go  |  1 +
 examples/client-read-h264/main.go             |  1 +
 examples/client-read-republish/main.go        | 67 +++++++++++++++++++
 examples/client-read/main.go                  |  4 +-
 5 files changed, 72 insertions(+), 2 deletions(-)
 create mode 100644 examples/client-read-republish/main.go

diff --git a/README.md b/README.md
index 429856e0..d7e07274 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,7 @@ Features:
 * [client-read-h264-convert-to-jpeg](examples/client-read-h264-convert-to-jpeg/main.go)
 * [client-read-h264-save-to-disk](examples/client-read-h264-save-to-disk/main.go)
 * [client-read-aac](examples/client-read-aac/main.go)
+* [client-read-republish](examples/client-read-republish/main.go)
 * [client-publish-h264](examples/client-publish-h264/main.go)
 * [client-publish-aac](examples/client-publish-aac/main.go)
 * [client-publish-opus](examples/client-publish-opus/main.go)
diff --git a/examples/client-read-h264-convert-to-jpeg/main.go b/examples/client-read-h264-convert-to-jpeg/main.go
index bd435a14..5aa7855e 100644
--- a/examples/client-read-h264-convert-to-jpeg/main.go
+++ b/examples/client-read-h264-convert-to-jpeg/main.go
@@ -19,6 +19,7 @@ import (
 // 2. check if there's a H264 track
 // 3. convert H264 into raw frames
 // 4. encode the frames into JPEG images and save them on disk
+
 // This example requires the ffmpeg libraries, that can be installed in this way:
 // apt install -y libavformat-dev libswscale-dev gcc pkg-config
 
diff --git a/examples/client-read-h264/main.go b/examples/client-read-h264/main.go
index 6bc05fc8..4939e615 100644
--- a/examples/client-read-h264/main.go
+++ b/examples/client-read-h264/main.go
@@ -13,6 +13,7 @@ import (
 // 1. connect to a RTSP server and read all tracks on a path
 // 2. check if there's an H264 track
 // 3. convert H264 into raw frames
+
 // This example requires the ffmpeg libraries, that can be installed in this way:
 // apt install -y libavformat-dev libswscale-dev gcc pkg-config
 
diff --git a/examples/client-read-republish/main.go b/examples/client-read-republish/main.go
new file mode 100644
index 00000000..abb52c0e
--- /dev/null
+++ b/examples/client-read-republish/main.go
@@ -0,0 +1,67 @@
+package main
+
+import (
+	"log"
+
+	"github.com/aler9/gortsplib"
+	"github.com/aler9/gortsplib/pkg/base"
+	"github.com/pion/rtp"
+)
+
+// This example shows how to
+// 1. connect to a RTSP server and read all tracks on a path
+// 2. re-publish all tracks on another path.
+
+func main() {
+	reader := gortsplib.Client{}
+
+	// parse source URL
+	sourceURL, err := base.ParseURL("rtsp://localhost:8554/mystream")
+	if err != nil {
+		panic(err)
+	}
+
+	// connect to the server
+	err = reader.Start(sourceURL.Scheme, sourceURL.Host)
+	if err != nil {
+		panic(err)
+	}
+	defer reader.Close()
+
+	// get available methods
+	_, err = reader.Options(sourceURL)
+	if err != nil {
+		panic(err)
+	}
+
+	// find published tracks
+	tracks, baseURL, _, err := reader.Describe(sourceURL)
+	if err != nil {
+		panic(err)
+	}
+
+	log.Printf("republishing %d tracks", len(tracks))
+
+	publisher := gortsplib.Client{}
+
+	// connect to the server and start publishing
+	err = publisher.StartPublishing("rtsp://localhost:8554/mystream2", tracks)
+	if err != nil {
+		panic(err)
+	}
+	defer publisher.Close()
+
+	// called when a RTP packet arrives
+	reader.OnPacketRTP = func(trackID int, pkt *rtp.Packet) {
+		publisher.WritePacketRTP(trackID, pkt)
+	}
+
+	// start reading tracks
+	err = reader.SetupAndPlay(tracks, baseURL)
+	if err != nil {
+		panic(err)
+	}
+
+	// wait until a fatal error
+	panic(reader.Wait())
+}
diff --git a/examples/client-read/main.go b/examples/client-read/main.go
index 22f5fda7..a852bdbe 100644
--- a/examples/client-read/main.go
+++ b/examples/client-read/main.go
@@ -8,8 +8,8 @@ import (
 	"github.com/pion/rtp"
 )
 
-// This example shows how to
-// 1. connect to a RTSP server and read all tracks on a path
+// This example shows how to connect to a RTSP server
+// and read all tracks on a path.
 
 func main() {
 	c := gortsplib.Client{