THE UNCONVENTIONAL DEVICES FOR THE VIDEO STREAMING
IN ANDROID
a.martellucci[at]reply.it
@martellux
+AlessandroMartellucci
m.bonifazi[at]reply.it
@mbonifazi
+MatteoBonifazi
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Engage users through streaming app
*http://www.nielsen.com/us/en/insights/reports/2014/shifts-in-viewing-the-cross-platform-report-q2-2014.html
+53% +80%
+60%
-1% -1% -2%
18/34 35/49 50/64 Ages
Engage users through streaming app
q In US more than 2 milion people watched last World Cup by a mobile App.1
q 270% increase in online video watched by smartphone and tablet.2
q More than one bilion tap on Google Chromecast cast button.3
q YouTube viewer habits prove “the bigger the screen, the longer people watch.”4
1)WatchESPN app access 2)Nielsen Q3 ‘14 Total Audience report 3) Google’s Omid Kordestani interview 2015 4) Youtube usage internal analysis.
q Playing a video content on your handheld device.
q Streaming taiolered for the user with
q Easiest way to enjoy video and music on user TV with
Presentation Millestone
Android multimedia framework
Android support for playing several media types from media file stored inside the application
(raw resources, standalone files) or for OTT streaming.
*Camera, foto rendering and other media type are managed by it but they are out of scope for this talk.
Network Protocols
RTSP (RTP, SDP)
HTTP/HTTPS progressive streaming
HTTP/HTTPS live streaming
Dynamic adaptive streaming over HTTP (DASH)
Smooth Streaming
Core Media Formats
H.263 ->3GPP(.3gp),MPEG-4(.mp4)
H.264 AVC -> 3GPP(.3gp),MPEG-4(.mp4),MPEG-TS(.ts)
MPEG-4 SP -> 3GPP(.3gp)
VP8 -> WebM(.webm),Matroska(.mkv) Note. Any given mobile device may provide support for additional formats or file types not listed in the table.
Android multimedia framework documentation
50% Android multimedia framework questions are unaswered on Stackoverflow
//1. Find the view from the layout VideoView myVideoView = (VideoView)findViewById(R.id.myvideoview); //2. Setup video url myVideoView.setVideoURI(Uri.parse(SrcPath)); //3. Setup Video controller myVideoView.setMediaController(new MediaController(this)); //4. Start playing myVideoView.requestFocus(); myVideoView.start();
VideoView.java
Media Playback 1/2
//0. Get SurfaceView and its holder mPreview = (SurfaceView)findViewById(R.id.surfaceView); holder = mPreview.getHolder(); mp = new MediaPlayer(); //1. Create MediaPlayer object: //2. Add SurfaceHolder callback - Aware when SurfaceView is created holder.addCallback(new SurfaceHolder.Callback(){ .... @Override public void surfaceCreated(SurfaceHolder holder) { mp.setDisplay(holder); //3. Attach the surface to the player try { mp.setDataSource(filepath);
//4. Prepare the Mediaplayer in sync or async mode ( prepareAsync() ) mp.prepare(); } catch (Exception e) {// Catch the exception} mp.start(); //5. Start the player }... });
MediaPlayer.java
Media Playback 2/2
ExoPlayer ExoPlayer is a media player built on top of the MediaExtractor and MediaCodec APIs released in Android 4.1 (API level 16). ExoPlayer provides default TrackRenderer implementations for audio and video, which make use of the MediaCodec and AudioTrack classes in the Android framework. During playback, your app can listen for events generated by the ExoPlayer that indicates the overall state of the player (ExoPlayer.Listener).
player = ExoPlayer.Factory.newInstance(RENDERER_COUNT, minBuffer, maxBuffer); // 2. Construct renderers. DataSource dataSource = new UriDataSource(userAgent, bandwidthMeter); HlsChunkSource chunkSource = new HlsChunkSource(dataSource, url, manifest, bandwidthMeter, null,
HlsChunkSource.ADAPTIVE_MODE_SPLICE); HlsSampleSource sampleSource = new HlsSampleSource(chunkSource, true, 3); MediaCodecVideoTrackRenderer videoRenderer = new MediaCodecVideoTrackRenderer(sampleSource, MediaCodec.VIDEO_SCALING_MODE_SCALE_TO_FIT, 5000, player.getMainHandler(), player, 50); MediaCodecAudioTrackRenderer audioRenderer = new MediaCodecAudioTrackRenderer(sampleSource); player.prepare(videoRenderer, audioRenderer); // 3. Inject the renderers through prepare. player.setSurface(surfaceView.getHolder().getSurface()); // 4. Pass the surface to the video renderer. player.setPlayWhenReady(true); // 5. Start playback … … player.release(); // Release when everything is done!
ExoPlayer.java
ExoPlayer – HLS implementation
What next? q Built-in players
ü AwesomePlayer (default player selected)
ü NuPlayer (Apple HLS)
q Extra player factories can be registered
q DIY mediaplayer ü Demuxing: android.media.mediaExtractor
ü Decoding: android.media.MediaCodec
ü Video rendering: android.media.MediaCodec
ü Audio rendering: android.media.AudioTrack
ü Implement the interfaceframeworks/av/include/media/MediaPlayerInterface.h
Android TV
Android TV is Android!!!
Smartphone 5” 320 dp
TV Full HD 30” 320 dp
10 feet
16 inches
10 foot experience
Keep calm and lean back!!
Provides built-in tailored for 10 feet experience
<uses-feature android:name="android.software.leanback" android:required="true" /> <application android:allowBackup="false”
android:label="@string/app_name” android:theme="@style/Theme.Leanback" >
<activity android:name="MainActivity”
android:screenOrientation="landscape" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category
android:name="android.intent.category.LEANBACK_LAUNCHER" /> </intent-filter> </activity>
AndroidManifest.xml
Android Manifest features1/2
Android Manifest features 2/2
Supporting landscape orientation is mandatory
No touch screen is required
<uses-feature android:name="android.hardware.sensor.accelerometer” android:required="false" />
<uses-feature android:name="android.hardware.touchscreen” android:required="false"/>
<activity android:name=”AndroidTvActivity” android:screenOrientation="landscape" >
Limit your sensor! Your app doesn’t need to accelerate!!!
Leanback UI component – BroswerFragment
Leanback UI component – DetailFragment
Building Live TV Apps
TV Input Framework provides a unified method for receiving audio and video channel content from hardware sources and software sources.
Android 5.0 (API level 21) or higher
TV Provider manages all EPG info, meanwhile TV Input Manager handles streaming contents.
TV Input Manager
<service android:name=”droidcon.it.DroidconTvInputService" android:label="@string/sample_tv_input_label" android:permission="android.permission.BIND_TV_INPUT"> <intent-filter> <action android:name="android.media.tv.TvInputService" /> </intent-filter> <meta-data android:name="android.media.tv.input" android:resource="@xml/sample_tv_input" /> </service>
onTune() event is fired when user selects a channel, and notifies the system TV app for changes in the content and meta data.
TvInputService creates a TvInputService.Session that implements Handler.Callback to handle player state changes.
TV provider
<uses-permission android:name="com.android.providers.tv.permission.READ_EPG_DATA" /> <uses-permission android:name="com.android.providers.tv.permission.WRITE_EPG_DATA" />
Tv Channel
COLUMN_DESCRIPTION COLUMN_DISPLAY_NAME
COLUMN_DISPLAY_NUMBER COLUMN_INPUT_ID
COLUMN_SERVICE_TYPE COLUMN_TRANSPORT_STREAM_ID
COLUMN_TYPE
COLUMN_INTERNAL_PROVIDER_DATA COLUMN_NETWORK_AFFILIATION COLUMN_ORIGINAL_NETWORK_ID
COLUMN_SEARCHABLE COLUMN_SERVICE_ID
COLUMN_VERSION_NUMBER COLUMN_VIDEO_FORMAT
Tv Program
COLUMN_LONG_DESCRIPTION COLUMN_POSTER_ART_URI COLUMN_SEASON_NUMBER
COLUMN_SHORT_DESCRIPTION COLUMN_START_TIME_UTC_MILLIS
COLUMN_THUMBNAIL_URI COLUMN_TITLE
COLUMN_VERSION_NUMBER COLUMN_VIDEO_HEIGHT COLUMN_VIDEO_WIDTH
COLUMN_AUDIO_LANGUAGE COLUMN_BROADCAST_GENRE COLUMN_CANONICAL_GENRE
COLUMN_CHANNEL_ID COLUMN_CONTENT_RATING
COLUMN_END_TIME_UTC_MILLIS COLUMN_EPISODE_NUMBER
COLUMN_EPISODE_TITLE COLUMN_INTERNAL_PROVIDER_DATA
A basic database of TV content metadata such as channel and program information.
Manifest permission:
Chromecast a cast-ready device for multi-screen experience
source: www.google.it
Chromecast some numbers
• 10 million units sold • 1 billion times for Cast button • 300+ apps on Play Store • 6000 developers on 10000 apps
Chromecast components
• Google Cast technology
• Multi-Screen experiece • Google Cast SDK
• Sender Application • Android app • iOS app • Chrome app
• Receiver Application • Default Media Receiver • Styled Media Receiver • Custom Media Receiver
Android Client Application library dependencies
• Minimum SDK version supported by Google Cast is 9 (Gingerbread) • MediaRouter API of android-support-v7 • Google Play Services • AppCompat API of android-support-v7
Android Client Application typical sender application flow
• Sender app starts MediaRouter device discovery: MediaRouter.addCallback • MediaRouter informs sender app of the route the user selected: MediaRouter.Callback.onRouteSelected • Sender app retrieves CastDevice instance: CastDevice.getFromBundle • Sender app creates and uses GoogleApiClient: GoogleApiClient.Builder
• Sender app launches the receiver app: Cast.CastApi.launchApplication • Sender app creates a communication channel: Cast.CastApi.setMessageReceivedCallbacks • Sender sends a message to the receiver over the communication channel: Cast.CastApi.sendMessage
source: developers.google.com
Cast-Ready Device Discovery capabilities
Remote Playback Live Audio Live Video
MediaRouteSelector.Builder builder = new MediaRouteSelector.Builder(); builder.addControlCategory(MediaControlIntent.CATEGORY_REMOTE_PLAYBACK); builder.addControlCategory(MediaControlIntent.CATEGORY_LIVE_AUDIO); builder.addControlCategory(MediaControlIntent.CATEGORY_LIVE_VIDEO); MediaRouterSelector selector = builder.build();
MainAc'vity.java
Media Cast Button easy approach for discovering
source: developers.google.com source: developers.google.com
public boolean onCreateOptionsMenu(Menu menu) { MenuItem mediaRouteMenuItem = menu.findItem(R.id.media_route_menu_item); MediaRouteActionProvider mediaRouteActionProvider = (MediaRouteActionProvider) MenuItemCompat.getActionProvider(mediaRouteMenuItem); mediaRouteActionProvider.setRouteSelector(mMediaRouteSelector); }
MainAc'vity.java
RemoteMediaPlayer …finally
MediaInfo mediaInfo = new MediaInfo.Builder("http://your.server.com/video.mp4") .setContentType("video/mp4") .setStreamType(MediaInfo.STREAM_TYPE_BUFFERED) .setMetadata(mediaMetadata) .build();
… mRemoteMediaPlayer = new RemoteMediaPlayer(); mRemoteMediaPlayer.load(mApiClient, mediaInfo, true); …
MainAc'vity.java
Receiver Application powered by Chrome
What is?
HTML5 and Javascript application
What does? Display the media content on TV
Message handling
Which type?
Default Media Receiver
Styled Media Receiver Custom Media Receiver
source: unknow
Default Media Receiver simplest
• Off-the-shelf
• No UI customization
• No registration
Source: developers.google.com
Styled Media Receiver simple and customizable
• Similar to Default Media Player
• CSS UI customization
• Registration
Source: developers.google.com
Custom Media Receiver whatever you want
• Fully Web Applicaiton
• Debug(able) at 9222
• Registration
Source: developers.google.com
Custom Media Receiver basic example
<html> <head> <title>Example minimum receiver</title> <script src="//www.gstatic.com/cast/sdk/libs/receiver/2.0.0/cast_receiver.js"></script> </head> <body> <video id='media'/> <script> window.mediaElement = document.getElementById('media'); window.mediaManager = new cast.receiver.MediaManager(window.mediaElement); window.castReceiverManager = cast.receiver.CastReceiverManager.getInstance(); window.castReceiverManager.start(); </script> </body> </html>
Index.htm
Custom Media Receiver advanced features
• Video Codification/Decodification • H.264 High Profile Level 4.1, 4.2 and 5 • VP8
• Adaptive Bitrate Streaming
• HTTP Live Streaming (HLS) • Dynamic Adaptive Streaming over HTTP (MPEG-DASH) • Smooth Streaming
• Digital Rights Management • Play Ready DRM • Widevine DRM
• Media Player Library
Custom Media Receiver advanced example
Index.htm
<html> <head> <script src="//www.gstatic.com/cast/sdk/libs/mediaplayer/1.0.0/media_player.js" /> </head> <body> <script type="text/javascript"> window.defaultOnLoad = mediaManager.onLoad; mediaManager.onLoad = function (event) { if (window.player !== null) { player.unload(); window.player = null; }
Custom Media Receiver advanced example
if (event.data['media'] && event.data['media']['contentId']) { var url = event.data['media']['contentId']; window.host = new cast.player.api.Host({'mediaElement':mediaElement, 'url':url}); var ext = url.substring(url.lastIndexOf('.'), url.length); var startAt = event.data['media']['currentTime'] || 0; var autoplay = event.data['autoplay'] || true; var protocol = null; mediaElement.autoplay = autoplay; if (url.lastIndexOf('.m3u8') >= 0) { protocol = cast.player.api.CreateHlsStreamingProtocol(host); } else if (url.lastIndexOf('.mpd') >= 0) { protocol = cast.player.api.CreateDashStreamingProtocol(host); } else if (url.indexOf('.ism/') >= 0) { protocol = cast.player.api.CreateSmoothStreamingProtocol(host); }
Index.htm
Custom Media Receiver advanced example
host.onError = function(errorCode) { if (window.player) { window.player.unload(); window.player = null; } }; if (protocol !== null) { window.player = new cast.player.api.Player(host); window.player.load(protocol, startAt); } else { window.defaultOnLoad(event); } } } window.player = null; window.castReceiverManager = cast.receiver.CastReceiverManager.getInstance(); castReceiverManager.start();
Index.html
Resources
• Google Cast: https://developers.google.com/cast • Chromecast App: http://www.google.it/chrome/devices/chromecast/apps.html • Google Cast Downloads: https://developers.google.com/cast/docs/downloads • Github: https://github.com/googlecast
• Android TV: https://developer.android.com/tv • Android TV Apps: http://www.google.it/chrome/devices/chromecast/apps.html • Android TV codelab: g.co/dev/codelab-androidtv • Github Leanback: https://github.com/googlesamples/androidtv-Leanback.git
Enjoy the video thank you to all of you
Source: www.huffingtonpost.ca
+MatteoBonifazi +AlessandroMartellucci @mbonifazi @martellux