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Live Streaming for Android
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Daichi Furiya (Wasabeef)
September 16, 2016
Programming
5
490
Live Streaming for Android
Introduction to Live Streaming
Daichi Furiya (Wasabeef)
September 16, 2016
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Transcript
Live Streaming for Android wasabeef Shibuya.apk #10
About me Daichi Furiya Google Developer Expert AbemaTV, Inc. wasabeef
@wasabeef_jp
Streaming?
HLS MPEG-DASH Microsoft Smooth Streaming RTMP Streaming?
Streaming? HLS HLS Encryption, Ads, Meta Encode, BroadCast Transcode, HLS
RTMP
Video compression
Video compression 30fps 1sec 60KB × 30 = 1.8MB 1min
1.8MB × 60 = 108MB 1hour 108MB × 10 = 1.1GB 60KB 65KB 55KB 50KB
Video compression 60KB 5KB 2KB 7KB 30fps 1sec 60KB +
(4KB × 30) = 180KB 1min 60KB + (4KB × 1800) = 7.2MB 1hour 7.2MB × 10 = 72MB
Video compression Be impossible ;(
Key Frame Be possible :)
Video structure Video Audio Meta Butterfly…? Discovered
Format
Container format
.avi .mp4 .mkv .ogg .flv etc.. Container format Video H.264
H.265 Divx VP9 Audio AAC WMA Voribis PCM Caption SAMI, SMIL Hi-Caption CMML, DXFP Meta Date Author Title
Video codec
H.264/MPEG-4 AVC H.265/HEVC VP9 Video Codec
8K 300fps Half the size of AVC Android 5.+ H.265/HEVC
Audio codec
MP3 AAC Vorbis Audio Codec
HTTP Live Streaming
Apple Adaptive bitrate streaming MPEG2-TS H.264/AAC HLS
playlist.m3u8
#EXTM3U #EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=200000 gear1/prog_index.m3u8 #EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=311111 gear2/prog_index.m3u8 #EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=484444 gear3/prog_index.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=737777 gear4/prog_index.m3u8 playlist.m3u8
playlist.m3u8 gear1/prog_index.m3u8 BANDWIDTH: 200000 Header gear2/prog_index.m3u8 BANDWIDTH: 311111 gear3/prog_index.m3u8 BANDWIDTH:
484444 gear4/prog_index.m3u8 BANDWIDTH: 737777
#EXTM3U #EXT-X-TARGETDURATION:10 #EXT-X-MEDIA-SEQUENCE:0 #EXTINF:10, no desc fileSequence0.ts #EXTINF:10, no desc
fileSequence1.ts #EXTINF:10, no desc ~~~ 2-179.ts ~~~ fileSequence180.ts #EXT-X-ENDLIST playlist.m3u8
ts?
Transport Stream (ts) fileSequence0.ts Container (2sec 〜 10sec)
playlist.m3u8 FileSequence1.ts Length: 5sec FileSequence2.ts Length: 5sec FileSequence3.ts Length: 5sec
FileSequence4.ts Length: 5sec Header Footer
playlist.m3u8 FileSequence1.ts Length: 5sec FileSequence2.ts Length: 5sec ad.ts Length: 5sec
FileSequence3.ts Length: 5sec Header Footer
Dynamic Adaptive Streaming over HTTP
Microsoft, Netflix, Google, Ericsson, Samsung, Adobe Adaptive bitrate streaming MP4,
WebM, MPEG2-TS MPEG-DASH
<mdp> - Root manifest.mdp <period> - A start time and
duration. <AdaptationSet> - Audio/Video content <Representation> - Bitrate and Aspect
DRM
WideVine
Google Modular (Android 4.3+) Classic (Android 3+) MPEG-DASH SurfaceView WideVine
PlayReady
MicroSoft PlayReady HLS Android 3+ TextureView PlayReady
ExoPlayer
Google OSS HLS, MPEG-DASH, SmoothStreaming WideVine (4.3+) https://github.com/google/ExoPlayer ExoPlayer
Amazon OSS Bug fix https://github.com/amzn/exoplayer-amazon-port ExoPlayer Amazon Port
Conclusion
Thank you. twitter.com/wasabeef_jp wasabeef.jp github.com/wasabeef