The unconventional devices for the video streaming in Android

THE UNCONVENTIONAL DEVICES FOR THE VIDEO STREAMING

IN ANDROID

a.martellucci[at]reply.it

@martellux

+AlessandroMartellucci

m.bonifazi[at]reply.it

@mbonifazi

+MatteoBonifazi

Who We Are

•  Reply is today a leading IT Services Company, which operates in Italy,

Germany, UK, Benelux, USA and Brazil.

•  Open Reply is the company of Reply Group focused on open source

software, multichannel web solutions and mobile applications.

•  Based in Rome, our team is based a young team of over 40 engineers

100% focused on mobile development (iOS, Android & Windows Phone).

•  We are specialised in broadcasting, banking and Android OS

Customisation.

Open Reply

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 interface

frameworks/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