Merge pull request #48 from vivienbcr/AES-Encryption

Add HLS AES encryption

README.md

@@ -221,5 +221,39 @@ func main() {
 }
 ```
 
+Example with AES encryption :
+
+More information about [HLS encryption with FFMPEG](https://hlsbook.net/how-to-encrypt-hls-video-with-ffmpeg/)
+
+```bash
+# Generate key
+openssl rand 16 > enc.key
+```
+
+Create key file info :
+
+```enc.keyinfo
+Key URI
+Path to key file
+```
+
+```golang
+func main() {
+
+	trans := new(transcoder.Transcoder)
+
+	err := trans.Initialize(inputPath, outputPath)
+
+	trans.MediaFile().SetVideoCodec("libx264")
+
+	trans.MediaFile().SetHlsSegmentDuration(4)
+
+	trans.MediaFile().SetEncryptionKey(keyinfoPath)
+
+	progress := trans.Output()
+
+	err = <-done
+}
+
 ----
 > Building...

models/media.go

@@ -72,6 +72,7 @@ type Mediafile struct {
 	audioFilter           string
 	skipVideo             bool
 	skipAudio             bool
+	encryptionKey         string
 	movflags              string
 	bframe                int
 	pixFmt                string
@@ -596,6 +597,14 @@ func (m *Mediafile) Metadata() Metadata {
 	return m.metadata
 }
 
+func (m *Mediafile) SetEncryptionKey(v string) {
+	m.encryptionKey = v
+}
+
+func (m *Mediafile) EncryptionKey() string {
+	return m.encryptionKey
+}
+
 /** OPTS **/
 func (m *Mediafile) ToStrCommand() []string {
 	var strCommand []string
@@ -656,6 +665,7 @@ func (m *Mediafile) ToStrCommand() []string {
 		"VideoFilter",
 		"HttpMethod",
 		"HttpKeepAlive",
+		"EncryptionKey",
 		"OutputPath",
 		"Bframe",
 		"MovFlags",
@@ -1087,6 +1097,10 @@ func (m *Mediafile) ObtainStreamIds() []string {
 	return nil
 }
 
+func (m *Mediafile) ObtainEncryptionKey() []string {
+	return []string{"-hls_key_info_file", m.encryptionKey}
+}
+
 func (m *Mediafile) ObtainBframe() []string {
 	if m.bframe != 0 {
 		return []string{"-bf", fmt.Sprintf("%d", m.bframe)}