Validating HTTP Live Streams

Transcription

1 Media #WWDC16 Validating HTTP Live Streams Session 510 Eryk Vershen Media Engineer 2016 Apple Inc. All rights reserved. Redistribution or public display not permitted without written permission from Apple.

2 Validate To establish the soundness, or accuracy of

3 HLS Validation Check HLS playlists and media segments Files are properly formatted Streams obey additional requirements Streams adhere to best practices

4 Stream Plays Well

5 Specifications

6 HLS Specification

7 HLS Specification IETF Internet Draft First published May 2009 Updated 2 3 times per year Covers playlist structure, playlist tags, and client/server responsibilities

8 HLS Authoring Specification apple.com

9 HLS Authoring Specification HLS Authoring Specification for Apple Devices HLSAuthoringSpec/ First published October 2015 (for tvos) Updated for WWDC 2016 (for ios and OS X also) Covers the characteristics of well-formed content apple.com

10 HLS Authoring Specification The requirements are based on HLS specification Device features Desired user experience Apple experience and analysis Feedback from third-parties

11 // HLS Authoring Specification // Some example requirements 1.1 All video MUST be encoded using AVC/H Key frames (IDRs) SHOULD be present every two seconds For VOD content, the measured peak bit rate MUST be within 10% of the BANDWIDTH attribute. 6.1 I-frame playlists (EXT-X-I-FRAME-STREAM-INF) MUST be provided to support scrubbing and scanning UI. 7.3 Video segments MUST start with an IDR frame All variants and renditions MUST have discontinuities at the same points in time. 9.5 You SHOULD deliver video and audio as separate streams.

12 Tools

13 apple.com

14 developer.apple.com/streaming/ apple.com

15 developer.apple.com/streaming/ apple.com

16 apple.com

17 HTTP Live Streaming Tools Media Stream Validator HLS Report Media File Segmenter Media Stream Segmenter Media Subtitle Segmenter Variant Playlist Creator ID3 Tag Generator

18 mediafilesegmenter Command line Output Data file mediafilesegmenter movie_variant.mov prog_index.m3u8 filesequence*.ts Has options related to file names, file locations, playlist structure, media format, encryption, and inserting metadata

19 mediastreamvalidator Command line mediastreamvalidator

20 mediastreamvalidator Command line mediastreamvalidator Output Trace messages Data file validation_data.json

21 mediastreamvalidator Command line mediastreamvalidator Output Trace messages Data file Options validation_data.json -O - validation-data-path path Location for JSON file -t - timeout duration Timeout in seconds

22 $ mediastreamvalidator

23 $ mediastreamvalidator mediastreamvalidator: Version 1.2(160525) [/VOD/bipbop_adv_example_v2/master.m3u8] Started root playlist download [v2/prog_index.m3u8] Started media playlist download [v1/iframe_index.m3u8] Started media playlist download [v4/iframe_index.m3u8] Started media playlist download [v5/prog_index.m3u8] Started media playlist download [v1/prog_index.m3u8] Started media playlist download [a3/prog_index.m3u8] Started media playlist download [v3/iframe_index.m3u8] Started media playlist download [v8/prog_index.m3u8] Started media playlist download [v4/prog_index.m3u8] Started media playlist download [a2/prog_index.m3u8] Started media playlist download [v6/iframe_index.m3u8] Started media playlist download [v2/iframe_index.m3u8] Started media playlist download [v7/prog_index.m3u8] Started media playlist download [v3/prog_index.m3u8] Started media playlist download [a1/prog_index.m3u8] Started media playlist download [v5/iframe_index.m3u8] Started media playlist download

24 $ mediastreamvalidator mediastreamvalidator: Version 1.2(160525) [/VOD/bipbop_adv_example_v2/master.m3u8] Started root playlist download [v2/prog_index.m3u8] Started media playlist download [v1/iframe_index.m3u8] Started media playlist download [v4/iframe_index.m3u8] Started media playlist download [v5/prog_index.m3u8] Started media playlist download [v1/prog_index.m3u8] Started media playlist download [a3/prog_index.m3u8] Started media playlist download [v3/iframe_index.m3u8] Started media playlist download [v8/prog_index.m3u8] Started media playlist download [v4/prog_index.m3u8] Started media playlist download [a2/prog_index.m3u8] Started media playlist download [v6/iframe_index.m3u8] Started media playlist download [v2/iframe_index.m3u8] Started media playlist download [v7/prog_index.m3u8] Started media playlist download [v3/prog_index.m3u8] Started media playlist download [a1/prog_index.m3u8] Started media playlist download [v5/iframe_index.m3u8] Started media playlist download

25 Processed 100 out of 100 segments Average segment duration: Total segment bitrates (all discontinuities): average: kb/s, max: kb/s Playlist max bitrate: kb/s Audio Group ID: aud3 Discontinuity: sequence: 0, parsed segment count: 100 of 100, duration: sec, average: kb/s, max: kb/s Track ID: 1 Video Codec: avc1 Video profile: High Video level: 4.2 Video resolution: 1920x1080 Video average IDR interval: , Standard deviation: Video frame rate: Track ID: 2 $

26 hlsreport Command line hlsreport.py validation_data.json

27 hlsreport Command line Output HTML file hlsreport.py validation_data.json validation_data.html

28 hlsreport Command line Output HTML file hlsreport.py validation_data.json Options validation_data.html -O -output filename HTML output file name -i -id Show dataid -V --verbose Verbose output

29 Submitting to an App Store Validate your streams before you submit In itunes Connect, include a test stream URL in the Review Notes field

30 Demo Well, kind of a demo

31 $ mediastreamvalidator \ - validation-data-path a-validation.json \

32 $ mediastreamvalidator \ - validation-data-path a-validation.json \ mediastreamvalidator: Version 1.2(160525) [/example1.m3u8] Started root playlist download $...

33 $ mediastreamvalidator \ - validation-data-path a-validation.json \ mediastreamvalidator: Version 1.2(160525) [/example1.m3u8] Started root playlist download... $ $ hlsreport.py a-validation.json

34 $ mediastreamvalidator \ - validation-data-path a-validation.json \ mediastreamvalidator: Version 1.2(160525) [/example1.m3u8] Started root playlist download... $ $ hlsreport.py a-validation.json $

35 $ mediastreamvalidator \ - validation-data-path a-validation.json \ mediastreamvalidator: Version 1.2(160525) [/example1.m3u8] Started root playlist download... $ $ hlsreport.py a-validation.json $ $ ls

36 $ mediastreamvalidator \ - validation-data-path a-validation.json \ mediastreamvalidator: Version 1.2(160525) [/example1.m3u8] Started root playlist download... $ $ hlsreport.py a-validation.json $ $ ls a-validation.html a-validation.json $

37 Example 1 A playlist with several common errors

38 HLS Validation Report Subtitle Stream type: VOD Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries value over the entire stream. Variant Overview Audio ID # Max Rate % Diff. Avg Rate % Diff Resolution IDR Int. Framerate Profile Level En aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00

39 HLS Validation Report Subtitle Stream type: VOD Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries value over the entire stream. Variant Overview Audio ID # Max Rate % Diff. Avg Rate % Diff Resolution IDR Int. Framerate Profile Level En aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00

40 HLS Validation Report Subtitle Stream type: VOD Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries value over the entire stream. Variant Overview VOD LIVE EVENT UNKNOWN MIXED Audio ID # Max Rate % Diff. Avg Rate % Diff Resolution IDR Int. Framerate Profile Level En aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00

41 Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries Subtitle value over the entire stream. Variant Overview Audio ID # Max Rate % Diff. Avg Rate % Diff Resolution IDR Int. Framerate Profile Level En aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00 Rendition Overview Group # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption

42 le1.m3u8 re expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries annotated with an asterisk ('* Subtitle % Diff. Avg Rate % Diff Resolution IDR Int. Framerate Profile Level Encryption % Proc. 40.8% % 480 x High 2.1 NONE 100% 29.1% % 640 x High 3.0 NONE 100% 24.6% % 768 x High 3.0 NONE 100% 20.4% % 960 x High 3.2 NONE 100% 18.7% % 1280 x High 3.2 NONE 83% 17.5% % 1920 x High 4.2 NONE 57% 16.9% % 1920 x High 4.2 NONE 45% 16.5% % 1920 x High 4.2 NONE 33% 0:10:00 Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption % Proc.

43 le1.m3u8 re expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries annotated with an asterisk ('* Subtitle % Diff. Avg Rate % Diff Resolution IDR Int. Framerate Profile Level Encryption % Proc. 40.8% % 480 x High 2.1 NONE 100% 29.1% % 640 x High 3.0 NONE 100% 24.6% % 768 x High 3.0 NONE 100% 20.4% % 960 x High 3.2 NONE 100% 18.7% % 1280 x High 3.2 NONE 83% 17.5% % 1920 x High 4.2 NONE 57% 16.9% % 1920 x High 4.2 NONE 45% 16.5% % 1920 x High 4.2 NONE 33% 0:10:00 Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption % Proc.

44 Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries Subtitle value over the entire stream. Variant Overview Audio ID # PL Max Rate Rate Max % Diff. Rate Avg % Diff. Rate PL % Avg DiffRateResolution Avg IDR % Diff Int. Framerate Resolution Profile IDR Int. Level Framer En aud % % % x % x 270 High % % % x % x 360 High % % % x % x 432 High % % % x % x 540 High % % % x % x 720 High % % % x % x 1080 High % % % x % x 1080 High % % % x % x 1080 High Average duration processed: 0:10:00 Rendition Overview Group # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption

45 Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries Subtitle value over the entire stream. Variant Overview Audio ID # PL Max Rate Rate Max % Diff. Rate Avg % Diff. Rate PL % Avg DiffRateResolution Avg IDR % Diff Int. Framerate Resolution Profile IDR Int. Level Framer En aud % % % x % x 270 High % % % x % x 360 High % % % x % x 432 High % % % x % x 540 High % % % x % x 720 High % % % x % x 1080 High % % % x % x 1080 High % % % x % x 1080 High Average duration processed: 0:10:00 Rendition Overview Group # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption

46 Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries Subtitle value over the entire stream. Variant Overview Audio ID # PL Max Rate Rate Max % Diff. Rate Avg % Diff. Rate PL % Avg DiffRateResolution Avg IDR % Diff Int. Framerate Resolution Profile IDR Int. Level Framer En aud % % % x % x 270 High % % % x % x 360 High % % % x % x 432 High % % % x % x 540 High % % % x % x 720 High % % % x % x 1080 High % % % x % x 1080 High % % % x % x 1080 High Average duration processed: 0:10:00 Rendition Overview Group # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption

47 Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries Subtitle value over the entire stream. Variant Overview Audio ID # PL Max Rate Rate Max % Diff. Rate Avg % Diff. Rate PL % Avg DiffRateResolution Avg IDR % Diff Int. Framerate Resolution Profile IDR Int. Level Framer En aud % % % x % x 270 High % % % x % x 360 High % % % x % x 432 High % % % x % x 540 High % % % x % x 720 High % % % x % x 1080 High % % % x % x 1080 High % % % x % x 1080 High Average duration processed: 0:10:00 Rendition Overview Group # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption

48 Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries Subtitle value over the entire stream. Variant Overview With --pl option Audio ID # PL Max Rate Rate Max % Diff. Rate Avg % Diff. Rate PL % Avg DiffRateResolution Avg IDR % Diff Int. Framerate Resolution Profile IDR Int. Level Framer En aud % % % x % x 270 High % % % x % x 360 High % % % x % x 432 High % % % x % x 540 High % % % x % x 720 High % % % x % x 1080 High % % % x % x 1080 High % % % x % x 1080 High Average duration processed: 0:10:00 Rendition Overview Group # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption

49 % % 640 x High 3.0 Subtitle % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00 Rendition Overview Group ID # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption aud Audio AAC-LC Stereo Y eng NONE Average duration processed: 0:10:00 Checked against HLS Authoring Specification for Apple TV Must Fix Issues 1. The server MUST deliver playlists using gzip content-encoding

50 % % 640 x High 3.0 Subtitle % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00 Rendition Overview Group ID # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption aud Audio AAC-LC Stereo Y eng NONE Average duration processed: 0:10:00 Checked against HLS Authoring Specification for Apple TV Must Fix Issues 1. The server MUST deliver playlists using gzip content-encoding

51 Average duration processed: 0:10:00 Checked against HLS Authoring Specification for Apple TV Subtitle Must Fix Issues 1. The server MUST deliver playlists using gzip content-encoding Master Playlist 2. Measured average bitrate compared to master playlist declared value exceeds error tolerance Master Playlist Stream Definition for All Variants 3. I-frame playlists ( EXT-X-I-FRAME-STREAM-INF ) MUST be provided to support scrubbing and scanning UI Master Playlist 4. Measured peak bitrate compared to master playlist declared value exceeds error tolerance Master Playlist Stream Definition for All Variants Should Fix Issues 5. Captions, to make content accessible to the deaf or hard of hearing, SHOULD be provided with your streams

52 Average duration processed: 0:10:00 Checked against HLS Authoring Specification for Apple TV Subtitle Must Fix Issues 1. The server MUST deliver playlists using gzip content-encoding Master Playlist 2. Measured average bitrate compared to master playlist declared value exceeds error tolerance Master Playlist Stream Definition for All Variants 3. I-frame playlists ( EXT-X-I-FRAME-STREAM-INF ) MUST be provided to support scrubbing and scanning UI Master Playlist 4. Measured peak bitrate compared to master playlist declared value exceeds error tolerance Master Playlist Stream Definition for All Variants Should Fix Issues 5. Captions, to make content accessible to the deaf or hard of hearing, SHOULD be provided with your streams

53 Master Playlist Stream Definition for All Variants Should Fix Issues 5. Captions, to make content accessible to the deaf or hard of hearing, SHOULD be provided with your streams Subtitle Master Playlist 6. Master playlists SHOULD be delivered using Transport Layer Security (TLS) Master Playlist 7. The default video variant for WiFi delivery SHOULD be the 2000 kb/s variant Variant #8 8. You SHOULD support stream failover by listing duplicate streams in the Master Playlist All Variants Report Information MediaStreamValidator version: 1.2(160525) Report generator version: 1.1(160525) Report generation date: 05/31/16 11:03:22

54 Master Playlist Stream Definition for All Variants Should Fix Issues 5. Captions, to make content accessible to the deaf or hard of hearing, SHOULD be provided with your streams Subtitle Master Playlist 6. Master playlists SHOULD be delivered using Transport Layer Security (TLS) Master Playlist 7. The default video variant for WiFi delivery SHOULD be the 2000 kb/s variant Variant #8 8. You SHOULD support stream failover by listing duplicate streams in the Master Playlist All Variants Report Information MediaStreamValidator version: 1.2(160525) Report generator version: 1.1(160525) Report generation date: 05/31/16 11:03:22

55 Master Playlist Stream Definition for All Variants Should Fix Issues 5. Captions, to make content accessible to the deaf or hard of hearing, SHOULD be provided with your streams Subtitle Master Playlist 6. Master playlists SHOULD be delivered using Transport Layer Security (TLS) Master Playlist 7. The default video variant for WiFi delivery SHOULD be the 2000 kb/s variant Variant #8 8. You SHOULD support stream failover by listing duplicate streams in the Master Playlist All Variants Report Information MediaStreamValidator version: 1.2(160525) Report generator version: 1.1(160525) Report generation date: 05/31/16 11:03:22

56 Master Playlist Stream Definition for All Variants Should Fix Issues 5. Captions, to make content accessible to the deaf or hard of hearing, SHOULD be provided with your streams Subtitle Master Playlist 6. Master playlists SHOULD be delivered using Transport Layer Security (TLS) Master Playlist 7. The default video variant for WiFi delivery SHOULD be the 2000 kb/s variant Variant #8 8. You SHOULD support stream failover by listing duplicate streams in the Master Playlist All Variants Report Information MediaStreamValidator version: 1.2(160525) Report generator version: 1.1(160525) Report generation date: 05/31/16 11:03:22

57 Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries value over the entire stream. Subtitle Variant Overview Audio ID # Max Rate % Diff. Avg Rate % Diff Resolution IDR Int. Framerate Profile Level En aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00 Rendition Overview Group ID # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption aud Audio AAC-LC Stereo Y eng NONE

58 Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries value over the entire stream. Subtitle Variant Overview Audio ID # Max Rate % Diff. Avg Rate % Diff Resolution IDR Int. Framerate Profile Level En aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00 Rendition Overview Group ID # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption aud Audio AAC-LC Stereo Y eng NONE

59 Example 2 After fixing the previous problems

60 HLS Validation Report Subtitle Stream type: VOD Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries value over the entire stream. Variant Overview Audio ID # Max Rate % Diff. Avg Rate % Diff Resolution IDR Int. Framerate Profile Level En aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00

61 HLS Validation Report Subtitle Stream type: VOD Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries value over the entire stream. Variant Overview Audio ID # Max Rate % Diff. Avg Rate % Diff Resolution IDR Int. Framerate Profile Level En aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00

62 HLS Validation Report Subtitle Stream type: VOD Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries value over the entire stream. Variant Overview Audio ID # Max Rate % Diff. Avg Rate % Diff Resolution IDR Int. Framerate Profile Level En aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00

63 Subtitle b/s, IDs for default startup variants are highlighted in dark grey, entries annotated with an asterisk ('*') do not have a ate % Diff Resolution IDR Int. Framerate Profile Level Encryption % Proc % 480 x High 2.1 NONE 100% % 640 x High 3.0 NONE 100% % 768 x High 3.0 NONE 100% % 960 x High 3.2 NONE 100% % 1280 x High 3.2 NONE 100% % 1920 x High 4.2 NONE 100% % 1920 x High 4.2 NONE 100% % 1920 x High 4.2 NONE 100%

64 Subtitle b/s, IDs for default startup variants are highlighted in dark grey, entries annotated with an asterisk ('*') do not have a ate % Diff Resolution IDR Int. Framerate Profile Level Encryption % Proc % 480 x High 2.1 NONE 100% % 640 x High 3.0 NONE 100% % 768 x High 3.0 NONE 100% % 960 x High 3.2 NONE 100% % 1280 x High 3.2 NONE 100% % 1920 x High 4.2 NONE 100% % 1920 x High 4.2 NONE 100% % 1920 x High 4.2 NONE 100%

65 % % 960 x High 3.2 Subtitle % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00 Rendition Overview Group ID # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption aud Audio AAC-LC Stereo Y eng NONE sub Subtitle eng NONE Average duration processed: 0:10:00 Checked against HLS Authoring Specification for Apple TV Must Fix Issues 1. I-frame playlists ( EXT-X-I-FRAME-STREAM-INF ) MUST be provided to support scrubbing and scanning UI Master Playlist

66 % % 960 x High 3.2 Subtitle % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00 Rendition Overview Group ID # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption aud Audio AAC-LC Stereo Y eng NONE sub Subtitle eng NONE Average duration processed: 0:10:00 Checked against HLS Authoring Specification for Apple TV Must Fix Issues 1. I-frame playlists ( EXT-X-I-FRAME-STREAM-INF ) MUST be provided to support scrubbing and scanning UI Master Playlist

67 % 960 x High 3.2 NONE 100% % 1280 x High 3.2 NONE 100% % 1920 x High 4.2 NONE 100% % 1920 x High 4.2 NONE 100% Subtitle % 1920 x High 4.2 NONE 100% ate Type Codec Channels Sample Rate Elem. Lang. Encryption % Proc. 60 Audio AAC-LC Stereo Y eng NONE 100% - Subtitle eng NONE N/A g Specification for Apple TV ME-STREAM-INF ) MUST be provided to support scrubbing and scanning UI

68 All Variants Group ID # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption Subtitle aud Audio AAC-LC Stereo Y eng NONE sub Subtitle eng NONE Average duration processed: 0:10:00 Checked against HLS Authoring Specification for Apple TV Must Fix Issues 1. I-frame playlists ( EXT-X-I-FRAME-STREAM-INF ) MUST be provided to support scrubbing and scanning UI Master Playlist Should Fix Issues 2. Master playlists SHOULD be delivered using Transport Layer Security (TLS) Master Playlist 3. You SHOULD support stream failover by listing duplicate streams in the Master Playlist

69 All Variants Group ID # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption Subtitle aud Audio AAC-LC Stereo Y eng NONE sub Subtitle eng NONE Average duration processed: 0:10:00 Checked against HLS Authoring Specification for Apple TV Must Fix Issues 1. I-frame playlists ( EXT-X-I-FRAME-STREAM-INF ) MUST be provided to support scrubbing and scanning UI Master Playlist Should Fix Issues 2. Master playlists SHOULD be delivered using Transport Layer Security (TLS) Master Playlist 3. You SHOULD support stream failover by listing duplicate streams in the Master Playlist

70 Example 3 Let s see what happens with I-frame playlists

71 HLS Validation Report Subtitle Stream type: VOD Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries value over the entire stream. Variant Overview Audio ID # Max Rate % Diff. Avg Rate % Diff Resolution IDR Int. Framerate Profile Level En aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00

72 1. Master playlists SHOULD be delivered using Transport Layer Security (TLS) Group ID # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption aud Audio AAC-LC Stereo Y eng NONE Subtitle sub Subtitle eng NONE Average duration processed: 0:10:00 I-Frame Variant Overview Video ID # Max Rate % Diff. Avg Rate % Diff Scaled Avg Mult. Resolution IDR Int. IDR Std D % % x 480 x % % x 640 x % % x 768 x % % x 960 x % % x 1280 x % % x 1920 x Average duration processed: 0:10:00 Checked against HLS Authoring Specification for Apple TV Should Fix Issues

73 1. Master playlists SHOULD be delivered using Transport Layer Security (TLS) Group ID # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption aud Audio AAC-LC Stereo Y eng NONE Subtitle sub Subtitle eng NONE Average duration processed: 0:10:00 I-Frame Variant Overview Video ID # Max Rate % Diff. Avg Rate % Diff Scaled Avg Mult. Resolution IDR Int. IDR Std D % % x 480 x % % x 640 x % % x 768 x % % x 960 x % % x 1280 x % % x 1920 x Average duration processed: 0:10:00 Checked against HLS Authoring Specification for Apple TV Should Fix Issues

74 1. Master playlists SHOULD be delivered using Transport Layer Security (TLS) Group ID # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption aud Audio AAC-LC Stereo Y eng NONE Subtitle sub Subtitle eng NONE Average duration processed: 0:10:00 I-Frame Variant Overview Video ID # Max Rate % Diff. Avg Rate % Diff Scaled Avg Mult. Resolution IDR Int. IDR Std D % % x 480 x % % x 640 x % % x 768 x % % x 960 x % % x 1280 x % % x 1920 x Average duration processed: 0:10:00 Checked against HLS Authoring Specification for Apple TV Should Fix Issues

75 rt Layer Security (TLS) ec Channels Sample Rate Elem. Lang. Encryption ID % Proc. LC Stereo Y eng NONE 1 100% Subtitle eng NONE 2 N/A Scaled Avg Mult. Resolution IDR Int. IDR Std Dev. Encryption ID % Proc x 480 x NONE % x 640 x NONE % x 768 x NONE % x 960 x NONE % x 1280 x NONE % x 1920 x NONE % r Apple TV

76 rt Layer Security (TLS) ec Channels Sample Rate Elem. Lang. Encryption ID % Proc. LC Stereo Y eng NONE 1 100% Subtitle eng NONE 2 N/A With --id option Scaled Avg Mult. Resolution IDR Int. IDR Std Dev. Encryption ID % Proc x 480 x NONE % x 640 x NONE % x 768 x NONE % x 960 x NONE % x 1280 x NONE % x 1920 x NONE % r Apple TV

77 { "independentsegments" : true, "playlistkind" : "master", "gzipencoded" : true, "dataid" : 0, "validatorversion" : "1.2(160525)", "validatortimestamp" : " T10:51:08-07:00", "url" : "sslhosts" : { }, "sslcontentdeliveredsecurely" : false, "variants" : [ ], "hasclosedcaptiongroups" : true, "dataversion" : 1 }

78 { "independentsegments" : true, "playlistkind" : "master", "gzipencoded" : true, "dataid" : 0, "validatorversion" : "1.2(160525)", "validatortimestamp" : " T10:51:08-07:00", "url" : "sslhosts" : { }, "sslcontentdeliveredsecurely" : false, "variants" : [ ], "hasclosedcaptiongroups" : true, "dataversion" : 1 }

79 "variants" : [ { },... { "playlisttype" : VOD", "processedsegmentscount" : 300, "url" : "hasdiscsequencetag" : false, "measuredmeanbitrate" : 39838, "parsedsegmentscount" : 300, "iframeonly" : true, "sslcontentdeliveredsecurely" : true,... "discontinuities" : [ ], "playlisttargetduration" : 6, "dataid" : 16 },... ],

80 "variants" : [ { },... { "playlisttype" : VOD", "processedsegmentscount" : 300, "url" : "hasdiscsequencetag" : false, "measuredmeanbitrate" : 39838, "parsedsegmentscount" : 300, "iframeonly" : true, "sslcontentdeliveredsecurely" : true,... "discontinuities" : [ ], "playlisttargetduration" : 6, "dataid" : 16 },... ],

81 Example 4 Let s add some alternate audio

82 aud % % 480 x High 2.1 HLS Validation Report Subtitle Stream type: VOD Note on tables: all bitrates are expressed in kb/s, IDs for default startup variants are highlighted in dark grey, entries value over the entire stream. Variant Overview Audio ID # Max Rate % Diff. Avg Rate % Diff Resolution IDR Int. Framerate Profile Level aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2

83 Subtitle % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00 Rendition Overview Group ID # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption aud Audio AAC-LC Stereo Y eng NONE aud Audio AC Y eng NONE aud Audio EC Y eng NONE sub Subtitle eng NONE Average duration processed: 0:10:00 I-Frame Variant Overview Video ID # Max Rate % Diff. Avg Rate % Diff Scaled Avg Mult. Resolution IDR Int. IDR Std D % % x 480 x

84 Subtitle % % 1920 x High % % 1920 x High % % 1920 x High 4.2 Average duration processed: 0:10:00 Rendition Overview Group ID # Max Rate Avg Rate Type Codec Channels Sample Rate Elem. Lang. Encryption aud Audio AAC-LC Stereo Y eng NONE aud Audio AC Y eng NONE aud Audio EC Y eng NONE sub Subtitle eng NONE Average duration processed: 0:10:00 I-Frame Variant Overview Video ID # Max Rate % Diff. Avg Rate % Diff Scaled Avg Mult. Resolution IDR Int. IDR Std D % % x 480 x

85 % % 1280 x High 3.2 Subtitle % % 1920 x High % % 1920 x High % % 1920 x High 4.2 aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High 4.2

86 % % 1280 x High 3.2 Subtitle % % 1920 x High % % 1920 x High % % 1920 x High 4.2 aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High % % 1920 x High % % 1920 x High 4.2 aud % % 480 x High % % 640 x High % % 768 x High % % 960 x High % % 1280 x High % % 1920 x High 4.2

87 Where to Find Examples

88 developer.apple.com/streaming/examples/ apple.com

89 Example Streams bipbop_4x3_variant.m3u8 bipbop_16x9_variant.m3u8

90 Summary Obey the HLS Authoring Specification Validate your streams! Include a test stream URL when you submit

91 More Information

92 Related Sessions What's New in HTTP Live Streaming Mission Wednesday 3:00PM

93 Labs HTTP Live Streaming Lab AVFoundation / HTTP Live Streaming Lab Graphics, Games, and Media Lab C Graphics, Games, and Media Lab D Wednesday 4:00PM Thursday 9:00AM

94