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feat: add startwithSAP/subsegmentstartswithSAP for audio tracks (#1346)
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Add startwithSAP/subsegmentstartswithSAP for aac, ac3, ec3 and ac4 audio tracks according to LIVE or VOD profile.

Replaces #1055
Partial solution for #364

---------

Co-authored-by: Xingzhao Yun <xyun@dolby.com>
Co-authored-by: Joey Parrish <joeyparrish@google.com>
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@cosmin @XingzhaoYun @joeyparrish
3 people committed Feb 23, 2024
1 parent 71c175d commit d23cce8
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Showing 60 changed files with 111 additions and 69 deletions.
2 changes: 1 addition & 1 deletion packager/app/test/testdata/acc-he/output.mpd
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.763175S">
<Period id="0">
<AdaptationSet id="0" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="0" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<Representation id="0" bandwidth="73677" codecs="mp4a.40.5" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<BaseURL>bear-640x360-aac_he-silent_right-audio.mp4</BaseURL>
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2 changes: 1 addition & 1 deletion packager/app/test/testdata/audio-video-with-accessibilities-and-roles/output.mpd
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.736067S">
<Period id="0">
<AdaptationSet id="0" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="0" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<Accessibility schemeIdUri="urn:tva:metadata:cs:AudioPurposeCS:2007" value="1"/>
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="description"/>
<Representation id="0" bandwidth="133334" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
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2 changes: 1 addition & 1 deletion ...pp/test/testdata/audio-video-with-codec-switching-and-forced-commandline_order/output.mpd
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.8028S">
<Period id="0">
<AdaptationSet id="0" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="0" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<Representation id="0" bandwidth="133334" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<BaseURL>bear-640x360-audio.mp4</BaseURL>
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2 changes: 1 addition & 1 deletion packager/app/test/testdata/audio-video-with-codec-switching-encryption-trick-play/output.mpd
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</SegmentBase>
</Representation>
</AdaptationSet>
<AdaptationSet id="3" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="3" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<ContentProtection value="cenc" schemeIdUri="urn:mpeg:dash:mp4protection:2011" cenc:default_KID="31323334-3536-3738-3930-313233343536"/>
<ContentProtection schemeIdUri="urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b">
<cenc:pssh>AAAANHBzc2gBAAAAEHfv7MCyTQKs4zweUuL7SwAAAAExMjM0NTY3ODkwMTIzNDU2AAAAAA==</cenc:pssh>
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2 changes: 1 addition & 1 deletion packager/app/test/testdata/audio-video-with-codec-switching/output.mpd
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</SegmentBase>
</Representation>
</AdaptationSet>
<AdaptationSet id="2" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="2" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<Representation id="3" bandwidth="133334" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<BaseURL>bear-640x360-audio.mp4</BaseURL>
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2 changes: 1 addition & 1 deletion packager/app/test/testdata/audio-video-with-language-override-with-subtag/output.mpd
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.736067S">
<Period id="0">
<AdaptationSet id="0" contentType="audio" lang="pt-BR" subsegmentAlignment="true">
<AdaptationSet id="0" contentType="audio" lang="pt-BR" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<Representation id="0" bandwidth="133334" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<BaseURL>bear-640x360-audio.mp4</BaseURL>
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2 changes: 1 addition & 1 deletion packager/app/test/testdata/audio-video-with-language-override/output.mpd
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.736067S">
<Period id="0">
<AdaptationSet id="0" contentType="audio" lang="pt" subsegmentAlignment="true">
<AdaptationSet id="0" contentType="audio" lang="pt" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="main"/>
<Representation id="0" bandwidth="133334" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
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2 changes: 1 addition & 1 deletion ...ger/app/test/testdata/audio-video-with-trick-play-and-forced-commandline-order/output.mpd
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.8028S">
<Period id="0">
<AdaptationSet id="0" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="0" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<Representation id="0" bandwidth="133334" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<BaseURL>bear-640x360-audio.mp4</BaseURL>
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2 changes: 1 addition & 1 deletion packager/app/test/testdata/audio-video-with-trick-play/output.mpd
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.736067S">
<Period id="0">
<AdaptationSet id="0" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="0" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<Representation id="0" bandwidth="133334" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<BaseURL>bear-640x360-audio.mp4</BaseURL>
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2 changes: 1 addition & 1 deletion packager/app/test/testdata/audio-video-with-two-trick-play/output.mpd
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.736067S">
<Period id="0">
<AdaptationSet id="0" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="0" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<Representation id="0" bandwidth="133334" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<BaseURL>bear-640x360-audio.mp4</BaseURL>
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2 changes: 1 addition & 1 deletion packager/app/test/testdata/audio-video/output.mpd
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.736067S">
<Period id="0">
<AdaptationSet id="0" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="0" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<Representation id="0" bandwidth="133334" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<BaseURL>bear-640x360-audio.mp4</BaseURL>
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2 changes: 1 addition & 1 deletion packager/app/test/testdata/avc-aac-ts/output.mpd
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-live:2011" minBufferTime="PT2S" type="dynamic" publishTime="some_time" availabilityStartTime="some_time" minimumUpdatePeriod="PT5S" timeShiftBufferDepth="PT1800S">
<Period id="0" start="PT0S">
<AdaptationSet id="0" contentType="audio" segmentAlignment="true">
<AdaptationSet id="0" contentType="audio" startWithSAP="1" segmentAlignment="true">
<Representation id="0" bandwidth="194319" codecs="mp4a.40.2" mimeType="audio/MP2T" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<SegmentTemplate timescale="90000" media="bear-640x360-audio-$Number$.ts" startNumber="1">
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2 changes: 1 addition & 1 deletion ...ager/app/test/testdata/avc-ts-live-playlist-dash-dynamic-with-segment-deletion/output.mpd
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-live:2011" minBufferTime="PT2S" type="dynamic" publishTime="some_time" availabilityStartTime="some_time" minimumUpdatePeriod="PT5S" timeShiftBufferDepth="PT0.5S">
<Period id="0" start="PT0S">
<AdaptationSet id="0" contentType="audio" segmentAlignment="true">
<AdaptationSet id="0" contentType="audio" startWithSAP="1" segmentAlignment="true">
<Representation id="0" bandwidth="133919" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<SegmentTemplate timescale="90000" initialization="bear-640x360-audio-init.mp4" media="bear-640x360-audio-$Number$.m4s" startNumber="4">
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2 changes: 1 addition & 1 deletion packager/app/test/testdata/bandwidth-override/output.mpd
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.736067S">
<Period id="0">
<AdaptationSet id="0" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="0" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<Representation id="0" bandwidth="11111" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<BaseURL>bear-640x360-audio.mp4</BaseURL>
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2 changes: 1 addition & 1 deletion packager/app/test/testdata/dash-label/output.mpd
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</SegmentBase>
</Representation>
</AdaptationSet>
<AdaptationSet id="1" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="1" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<Label>English</Label>
<Representation id="1" bandwidth="133334" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
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4 changes: 2 additions & 2 deletions packager/app/test/testdata/encryption-and-ad-cues-and-dash-trick-play/output.mpd
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" xmlns:cenc="urn:mpeg:cenc:2013" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.736067S">
<Period id="0" duration="PT2.002S">
<AdaptationSet id="0" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="0" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<ContentProtection value="cenc" schemeIdUri="urn:mpeg:dash:mp4protection:2011" cenc:default_KID="31323334-3536-3738-3930-313233343536"/>
<ContentProtection schemeIdUri="urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b">
<cenc:pssh>AAAANHBzc2gBAAAAEHfv7MCyTQKs4zweUuL7SwAAAAExMjM0NTY3ODkwMTIzNDU2AAAAAA==</cenc:pssh>
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</AdaptationSet>
</Period>
<Period id="1" duration="PT0.734067S">
<AdaptationSet id="0" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="0" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<ContentProtection value="cenc" schemeIdUri="urn:mpeg:dash:mp4protection:2011" cenc:default_KID="31323334-3536-3738-3930-313233343536"/>
<ContentProtection schemeIdUri="urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b">
<cenc:pssh>AAAANHBzc2gBAAAAEHfv7MCyTQKs4zweUuL7SwAAAAExMjM0NTY3ODkwMTIzNDU2AAAAAA==</cenc:pssh>
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4 changes: 2 additions & 2 deletions packager/app/test/testdata/encryption-and-ad-cues-split-content/output.mpd
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<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" xmlns:cenc="urn:mpeg:cenc:2013" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.736067S">
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<AdaptationSet id="0" contentType="audio" subsegmentAlignment="true">
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<ContentProtection value="cenc" schemeIdUri="urn:mpeg:dash:mp4protection:2011" cenc:default_KID="31323334-3536-3738-3930-313233343536"/>
<ContentProtection schemeIdUri="urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b">
<cenc:pssh>AAAANHBzc2gBAAAAEHfv7MCyTQKs4zweUuL7SwAAAAExMjM0NTY3ODkwMTIzNDU2AAAAAA==</cenc:pssh>
Expand All @@ -29,7 +29,7 @@
</AdaptationSet>
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<ContentProtection value="cenc" schemeIdUri="urn:mpeg:dash:mp4protection:2011" cenc:default_KID="31323334-3536-3738-3930-313233343536"/>
<ContentProtection schemeIdUri="urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b">
<cenc:pssh>AAAANHBzc2gBAAAAEHfv7MCyTQKs4zweUuL7SwAAAAExMjM0NTY3ODkwMTIzNDU2AAAAAA==</cenc:pssh>
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4 changes: 2 additions & 2 deletions packager/app/test/testdata/encryption-and-ad-cues/output.mpd
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Expand Up @@ -2,7 +2,7 @@
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<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" xmlns:cenc="urn:mpeg:cenc:2013" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.736067S">
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Expand All @@ -29,7 +29,7 @@
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2 changes: 1 addition & 1 deletion packager/app/test/testdata/encryption-and-no-clear-lead/output.mpd
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2 changes: 1 addition & 1 deletion packager/app/test/testdata/encryption-and-no-pssh-in-stream/output.mpd
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" xmlns:cenc="urn:mpeg:cenc:2013" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.736067S">
<Period id="0">
<AdaptationSet id="0" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="0" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<ContentProtection value="cenc" schemeIdUri="urn:mpeg:dash:mp4protection:2011" cenc:default_KID="31323334-3536-3738-3930-313233343536"/>
<ContentProtection schemeIdUri="urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b">
<cenc:pssh>AAAANHBzc2gBAAAAEHfv7MCyTQKs4zweUuL7SwAAAAExMjM0NTY3ODkwMTIzNDU2AAAAAA==</cenc:pssh>
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2 changes: 1 addition & 1 deletion packager/app/test/testdata/encryption-and-non-dash-if-iop/output.mpd
View file
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<!--Generated with https://github.com/shaka-project/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" xmlns:cenc="urn:mpeg:cenc:2013" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.736067S">
<Period id="0">
<AdaptationSet id="0" contentType="audio" subsegmentAlignment="true">
<AdaptationSet id="0" contentType="audio" subsegmentStartsWithSAP="1" subsegmentAlignment="true">
<Representation id="0" bandwidth="133663" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<ContentProtection value="cenc" schemeIdUri="urn:mpeg:dash:mp4protection:2011" cenc:default_KID="31323334-3536-3738-3930-313233343536"/>
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