Add support to AV1 in play-from-disk

Resolves pion/rtp#190
Resolves pion/rtp#191

Author: Sean-Der

examples/play-from-disk/README.md

@@ -4,7 +4,7 @@ play-from-disk demonstrates how to send video and/or audio to your browser from
 For an example of playing H264 from disk see [play-from-disk-h264](https://github.com/pion/example-webrtc-applications/tree/master/play-from-disk-h264)
 
 ## Instructions
-### Create IVF named `output.ivf` that contains a VP8 track and/or `output.ogg` that contains a Opus track
+### Create IVF named `output.ivf` that contains a VP8/VP9/AV1 track and/or `output.ogg` that contains a Opus track
 ```
 ffmpeg -i $INPUT_FILE -g 30 -b:v 2M output.ivf
 ffmpeg -i $INPUT_FILE -c:a libopus -page_duration 20000 -vn output.ogg

examples/play-from-disk/main.go

@@ -61,8 +61,31 @@ func main() {
 	iceConnectedCtx, iceConnectedCtxCancel := context.WithCancel(context.Background())
 
 	if haveVideoFile {
+		file, openErr := os.Open(videoFileName)
+		if openErr != nil {
+			panic(openErr)
+		}
+
+		_, header, openErr := ivfreader.NewWith(file)
+		if openErr != nil {
+			panic(openErr)
+		}
+
+		// Determine video codec
+		var trackCodec string
+		switch header.FourCC {
+		case "AV01":
+			trackCodec = webrtc.MimeTypeAV1
+		case "VP90":
+			trackCodec = webrtc.MimeTypeVP9
+		case "VP80":
+			trackCodec = webrtc.MimeTypeVP8
+		default:
+			panic(fmt.Sprintf("Unable to handle FourCC %s", header.FourCC))
+		}
+
 		// Create a video track
-		videoTrack, videoTrackErr := webrtc.NewTrackLocalStaticSample(webrtc.RTPCodecCapability{MimeType: webrtc.MimeTypeVP8}, "video", "pion")
+		videoTrack, videoTrackErr := webrtc.NewTrackLocalStaticSample(webrtc.RTPCodecCapability{MimeType: trackCodec}, "video", "pion")
 		if videoTrackErr != nil {
 			panic(videoTrackErr)
 		}

examples/save-to-disk-av1/README.md

@@ -5,6 +5,8 @@ If you wish to save VP8 and Opus instead of AV1 see [save-to-disk](https://githu
 
 If you wish to save VP8/Opus inside the same file see [save-to-webm](https://github.com/pion/example-webrtc-applications/tree/master/save-to-webm)
 
+You can then send this video back to your browser using [play-from-disk](https://github.com/pion/example-webrtc-applications/tree/master/play-from-disk)
+
 ## Instructions
 ### Download save-to-disk-av1
 ```

examples/save-to-disk/README.md

@@ -3,6 +3,10 @@ save-to-disk is a simple application that shows how to record your webcam/microp
 
 If you wish to save VP8/Opus inside the same file see [save-to-webm](https://github.com/pion/example-webrtc-applications/tree/master/save-to-webm)
 
+If you wish to save AV1 instead see [save-to-disk-av1](https://github.com/pion/webrtc/tree/master/examples/save-to-disk-av1)
+
+You can then send this video back to your browser using [play-from-disk](https://github.com/pion/example-webrtc-applications/tree/master/play-from-disk)
+
 ## Instructions
 ### Download save-to-disk
 ```

mediaengine.go

@@ -182,6 +182,15 @@ func (m *MediaEngine) RegisterDefaultCodecs() error {
 			PayloadType:        118,
 		},
 
+		{
+			RTPCodecCapability: RTPCodecCapability{MimeTypeAV1, 90000, 0, "", videoRTCPFeedback},
+			PayloadType:        45,
+		},
+		{
+			RTPCodecCapability: RTPCodecCapability{"video/rtx", 90000, 0, "apt=45", nil},
+			PayloadType:        46,
+		},
+
 		{
 			RTPCodecCapability: RTPCodecCapability{"video/ulpfec", 90000, 0, "", nil},
 			PayloadType:        116,