Java ExoPlayer直播流在Askey Android电视盒上冻结，音频继续

在播放我们自己的DASH+widevine保护的直播流时，视频在Askey Android电视盒（Android 9）上几秒钟后冻结，音频继续播放。我还看到仍在提取视频块。 到目前为止，我们使用的所有其他安卓设备都能成功播放相同的流

在尝试了几个ExoPlayer版本（v2.7.3、v2.9.x）之后，我在github上的ExoPlayer演示播放器（v2.10.5）中集成了播放代码。这里也出现了同样的问题：视频冻结，音频继续

由于其他直播流在Askey AndroidTV框上没有问题，因此结论可能是流的配置以某种方式触发了此问题。但是流配置对于工作/失败流是相同的，并且播放器日志没有显示任何关于为什么会发生这种情况的线索。除了经常出现的错误外，也可能是在玩家未激活时：

E libc    : Access denied finding property "persist.vaudio.debug.search"
W HwBinder:3034_1: type=1400 audit(0.0:285045): avc: denied { read } for name="u:object_r:default_prop:s0" dev="tmpfs" ino=13267 scontext=u:r:hal_audio_default:s0 tcontext=u:object_r:default_prop:s0 tclass=file permissive=0

下面是视频冻结播放的日志。冻结发生在timelineChanged的时间戳4.34之后

W/ActivityThread: handleWindowVisibility: no activity for token android.os.BinderProxy@87575b6
I/ExoPlayerImpl: Init d420716 [ExoPlayerLib/2.10.5] [Android TV Box, askey, 28]
D/EventLogger: state [0.01, 0.00, window=0, true, BUFFERING]
D/mali_winsys: EGLint new_window_surface(egl_winsys_display *, void *, EGLSurface, EGLConfig, egl_winsys_surface **, EGLBoolean) returns 0x3000
D/EventLogger: surfaceSizeChanged [0.09, 0.00, window=0, 1920, 1080]
D/EventLogger: timelineChanged [0.15, 3.99, window=0, periodCount=1, windowCount=1, reason=PREPARED
      period [?]
      window [29.99, true, true]
    ]
D/EventLogger: mediaPeriodCreated [0.15, 3.99, window=0, period=0]
    loading [0.15, 3.99, window=0, period=0, true]
    decoderEnabled [0.15, 3.99, window=0, period=0, video]
D/EventLogger: decoderEnabled [0.16, 3.99, window=0, period=0, audio]
D/EventLogger: tracksChanged [0.16, 3.99, window=0, period=0, 
D/EventLogger:   Renderer:0 [
        Group:0, adaptive_supported=YES [
D/EventLogger:       [X] Track:0, id=dzGAGgaf, mimeType=video/avc, bitrate=400000, codecs=avc1.42e00d, res=400x224, fps=25.0, supported=YES
          [X] Track:1, id=dzEANQyf, mimeType=video/avc, bitrate=800000, codecs=avc1.4d401e, res=640x360, fps=25.0, supported=YES
D/EventLogger:       [X] Track:2, id=dzHgyBCf, mimeType=video/avc, bitrate=1100000, codecs=avc1.4d401e, res=704x396, fps=25.0, supported=YES
          [X] Track:3, id=dzEAahif, mimeType=video/avc, bitrate=1600000, codecs=avc1.4d401f, res=1024x576, fps=25.0, supported=YES
        ]
      ]
      Renderer:1 [
        Group:0, adaptive_supported=N/A [
          [X] Track:0, id=dyHiAZ8., mimeType=audio/mp4a-latm, bitrate=128000, codecs=mp4a.40.2, channels=2, sample_rate=48000, language=nl, supported=YES
        ]
      ]
    ]
D/EventLogger: mediaPeriodReadingStarted [0.18, 3.99, window=0, period=0]
D/EventLogger: downstreamFormatChanged [0.26, 3.99, window=0, period=0, id=dzEAahif, mimeType=video/avc, bitrate=1600000, codecs=avc1.4d401f, res=1024x576, fps=25.0]
D/EventLogger: downstreamFormatChanged [0.27, 3.99, window=0, period=0, id=dyHiAZ8., mimeType=audio/mp4a-latm, bitrate=128000, codecs=mp4a.40.2, channels=2, sample_rate=48000, language=nl]
D/EventLogger: drmSessionAcquired [0.39, 3.99, window=0, period=0]
I/OMXClient: IOmx service obtained
W/libEGL: EGLNativeWindowType 0xd4205808 disconnect failed
D/SurfaceUtils: connecting to surface 0xd1c85008, reason connectToSurface
I/MediaCodec: [OMX.amlogic.avc.decoder.awesome.secure] setting surface generation to 6428686
D/SurfaceUtils: disconnecting from surface 0xd1c85008, reason connectToSurface(reconnect)
    connecting to surface 0xd1c85008, reason connectToSurface(reconnect)
I/AmAVUtils: AmAVUtils::getComponentRole isEncoder :0 mime:video/avc 
V/AVUtils: AVUtils::getComponentRole
E/ACodec: [OMX.amlogic.avc.decoder.awesome.secure] setPortMode on output to DynamicANWBuffer failed w/ err -2147483648
I/AmAVUtils: AmAVUtils::isAudioExtendFormat input = video/avc
I/ACodec: codec does not support config priority (err -1010)
D/SurfaceUtils: disconnecting from surface 0xd1c85008, reason setNativeWindowSizeFormatAndUsage
    connecting to surface 0xd1c85008, reason setNativeWindowSizeFormatAndUsage
D/SurfaceUtils: set up nativeWindow 0xd1c85008 for 1024x576, color 0x11, rotation 0, usage 0x406933
D/EventLogger: decoderInitialized [0.65, 3.99, window=0, period=0, video, OMX.amlogic.avc.decoder.awesome.secure]
D/EventLogger: decoderInputFormatChanged [0.65, 3.99, window=0, period=0, video, id=dzEAahif, mimeType=video/avc, bitrate=1600000, codecs=avc1.4d401f, res=1024x576, fps=25.0]
I/OMXClient: IOmx service obtained
I/AmAVUtils: AmAVUtils::getComponentRole isEncoder :0 mime:audio/mp4a-latm 
V/AVUtils: AVUtils::getComponentRole
I/AmAVUtils: AmAVUtils::isAudioExtendFormat input = audio/mp4a-latm
I/ACodec: codec does not support config priority (err -2147483648)
I/ACodec: codec does not support config operating rate (err -2147483648)
D/EventLogger: decoderInitialized [0.89, 3.99, window=0, period=0, audio, OMX.google.aac.decoder]
D/EventLogger: decoderInputFormatChanged [0.89, 3.99, window=0, period=0, audio, id=dyHiAZ8., mimeType=audio/mp4a-latm, bitrate=128000, codecs=mp4a.40.2, channels=2, sample_rate=48000, language=nl]
D/EventLogger: drmKeysLoaded [3.40, 3.99, window=0, period=0]
D/EventLogger: videoSizeChanged [3.50, 3.99, window=0, period=0, 1024, 576]
D/EventLogger: renderedFirstFrame [3.52, 3.99, window=0, period=0, Surface(name=null)/@0xcb34ae4]
D/EventLogger: audioSessionId [3.53, 3.99, window=0, period=0, 465]
D/EventLogger: state [3.55, 3.99, window=0, period=0, true, READY]
D/AudioTrack: correcting timestamp time for pause, currentTimeNanos: 2143457176437 < limitNs: 2143461518478 < mStartNs: 2143503518478
D/AudioTrack: correcting timestamp time for pause, currentTimeNanos: 2143457176437 < limitNs: 2143461518478 < mStartNs: 2143503518478
D/AudioTrack: correcting timestamp time for pause, currentTimeNanos: 2143457176437 < limitNs: 2143461518478 < mStartNs: 2143503518478
D/EventLogger: timelineChanged [3.63, 0.00, window=0, period=0, periodCount=1, windowCount=1, reason=DYNAMIC
      period [?]
      window [29.98, true, true]
    ]
D/EventLogger: timelineChanged [4.34, 0.66, window=0, period=0, periodCount=1, windowCount=1, reason=DYNAMIC
      period [?]
      window [29.98, true, true]
    ]
D/EventLogger: timelineChanged [6.76, 1.08, window=0, period=0, periodCount=1, windowCount=1, reason=DYNAMIC
      period [?]
      window [29.98, true, true]
    ]
D/EventLogger: timelineChanged [8.44, 0.77, window=0, period=0, periodCount=1, windowCount=1, reason=DYNAMIC
      period [?]
      window [29.99, true, true]
D/EventLogger: ]
D/EventLogger: timelineChanged [10.51, 0.83, window=0, period=0, periodCount=1, windowCount=1, reason=DYNAMIC
      period [?]
D/EventLogger:   window [29.99, true, true]
    ]
D/EventLogger: timelineChanged [12.15, 0.47, window=0, period=0, periodCount=1, windowCount=1, reason=DYNAMIC
      period [?]
      window [29.98, true, true]
D/EventLogger: ]
D/EventLogger: timelineChanged [14.19, 0.50, window=0, period=0, periodCount=1, windowCount=1, reason=DYNAMIC
      period [?]
      window [29.98, true, true]
    ]
D/EventLogger: timelineChanged [16.14, 0.46, window=0, period=0, periodCount=1, windowCount=1, reason=DYNAMIC
      period [?]
D/EventLogger:   window [29.99, true, true]
    ]
D/EventLogger: timelineChanged [18.17, 0.49, window=0, period=0, periodCount=1, windowCount=1, reason=DYNAMIC
      period [?]
      window [29.99, true, true]
    ]
D/EventLogger: timelineChanged [20.14, 0.45, window=0, period=0, periodCount=1, windowCount=1, reason=DYNAMIC
      period [?]
      window [29.98, true, true]
    ]

最后，这里是冻结流的清单：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!--Created with VSPP Streamer version 5.2.4.2 build 95193 context 3374162112732519956-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:cenc="urn:mpeg:cenc:2013" xmlns:mspr="urn:microsoft:playready" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="dynamic" availabilityStartTime="1970-01-01T00:00:00Z" publishTime="2019-10-16T09:04:33Z" timeShiftBufferDepth="PT30S" minimumUpdatePeriod="PT2S" minBufferTime="PT12S">
    <Period id="1" start="PT0S">
        <AdaptationSet id="1" group="1" bitstreamSwitching="true" segmentAlignment="true" contentType="video" mimeType="video/mp4" maxWidth="1024" maxHeight="576" par="16:9" maxFrameRate="25" startWithSAP="1">
            <ContentProtection schemeIdUri="urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95" value="MSPR 2.0">
                <mspr:pro>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</mspr:pro>
                <cenc:pssh>AAADsHBzc2gAAAAAmgTweZhAQoarkuZb4IhflQAAA5CQAwAAAQABAIYDPABXAFIATQBIAEUAQQBEAEUAUgAgAHgAbQBsAG4AcwA9ACIAaAB0AHQAcAA6AC8ALwBzAGMAaABlAG0AYQBzAC4AbQBpAGMAcgBvAHMAbwBmAHQALgBjAG8AbQAvAEQAUgBNAC8AMgAwADAANwAvADAAMwAvAFAAbABhAHkAUgBlAGEAZAB5AEgAZQBhAGQAZQByACIAIAB2AGUAcgBzAGkAbwBuAD0AIgA0AC4AMAAuADAALgAwACIAPgA8AEQAQQBUAEEAPgA8AFAAUgBPAFQARQBDAFQASQBOAEYATwA+ADwASwBFAFkATABFAE4APgAxADYAPAAvAEsARQBZAEwARQBOAD4APABBAEwARwBJAEQAPgBBAEUAUwBDAFQAUgA8AC8AQQBMAEcASQBEAD4APAAvAFAAUgBPAFQARQBDAFQASQBOAEYATwA+ADwATABBAF8AVQBSAEwAPgBoAHQAdABwADoALwAvAGwAcAByAGQAcgBtAC4AeQBlAGwAbwAuAGYAdQB0AC4AdABlAGwAZQBuAGUAdAAtAG8AcABzAC4AYgBlAC8AcAByAGwAYwAvAHIAaQBnAGgAdABzAG0AYQBuAGEAZwBlAHIALgBhAHMAbQB4ADwALwBMAEEAXwBVAFIATAA+ADwATABVAEkAXwBVAFIATAA+AGgAdAB0AHAAOgAvAC8AbABwAHIAZAByAG0ALgB5AGUAbABvAC4AZgB1AHQALgB0AGUAbABlAG4AZQB0AC0AbwBwAHMALgBiAGUALwBwAHIAbABjAC8AcgBpAGcAaAB0AHMAbQBhAG4AYQBnAGUAcgAuAGEAcwBtAHgAPAAvAEwAVQBJAF8AVQBSAEwAPgA8AEQAUwBfAEkARAA+AEkAQwBEAHMASQBlAG8ANgBhAFIAQwBpADMAUQBnAEEASwB6AEEAdwBuAFEAPQA9ADwALwBEAFMAXwBJAEQAPgA8AEsASQBEAD4AMQBXAGoASwA2AFgAdQBhAHAAawBtAHAANgB4ACsARQBJAGEAeABVADQAZwA9AD0APAAvAEsASQBEAD4APABDAEgARQBDAEsAUwBVAE0APgBmAHgAagBwAEMAUwBrADcAMwBZADQAPQA8AC8AQwBIAEUAQwBLAFMAVQBNAD4APAAvAEQAQQBUAEEAPgA8AC8AVwBSAE0ASABFAEEARABFAFIAPgA=</cenc:pssh>
            </ContentProtection>
            <ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed">
                <cenc:pssh>AAAAY3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAEMIARIQ6cpo1Zp7Saap6x+EIaxU4hoLcGFjZXRlbGVuZXQiIGU5Y2E2OGQ1OWE3YjQ5YTZhOWViMWY4NDIxYWM1NGUy</cenc:pssh>
            </ContentProtection>
            <ContentProtection schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc"/>
            <SegmentTemplate timescale="10000000" media="S!d2ELREFTSF9IRDEwODASAlT-....ARYEnw__/QualityLevels($Bandwidth$)/Fragments(video=$Time$)" initialization="S!d2ELREFTSF9IRDEwODASAlT-....ARYEnw__/QualityLevels($Bandwidth$)/Fragments(video=Init)">
                <SegmentTimeline>
                    <S t="15712166312942690" d="20000000" r="14"/>
                </SegmentTimeline>
            </SegmentTemplate>
            <Representation id="dzGAGgaf" bandwidth="400000" codecs="avc1.42e00d" width="400" height="224" frameRate="25" sar="1:1"/>
            <Representation id="dzEANQyf" bandwidth="800000" codecs="avc1.4d401e" width="640" height="360" frameRate="25" sar="1:1"/>
            <Representation id="dzHgyBCf" bandwidth="1100000" codecs="avc1.4d401e" width="704" height="396" frameRate="25" sar="1:1"/>
            <Representation id="dzEAahif" bandwidth="1600000" codecs="avc1.4d401f" width="1024" height="576" frameRate="25" sar="1:1"/>
        </AdaptationSet>
        <AdaptationSet id="2" group="2" bitstreamSwitching="true" segmentAlignment="true" contentType="audio" mimeType="audio/mp4" lang="dut">
            <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
            <ContentProtection schemeIdUri="urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95" value="MSPR 2.0">
                <mspr:pro>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</mspr:pro>
                <cenc:pssh>AAADsHBzc2gAAAAAmgTweZhAQoarkuZb4IhflQAAA5CQAwAAAQABAIYDPABXAFIATQBIAEUAQQBEAEUAUgAgAHgAbQBsAG4AcwA9ACIAaAB0AHQAcAA6AC8ALwBzAGMAaABlAG0AYQBzAC4AbQBpAGMAcgBvAHMAbwBmAHQALgBjAG8AbQAvAEQAUgBNAC8AMgAwADAANwAvADAAMwAvAFAAbABhAHkAUgBlAGEAZAB5AEgAZQBhAGQAZQByACIAIAB2AGUAcgBzAGkAbwBuAD0AIgA0AC4AMAAuADAALgAwACIAPgA8AEQAQQBUAEEAPgA8AFAAUgBPAFQARQBDAFQASQBOAEYATwA+ADwASwBFAFkATABFAE4APgAxADYAPAAvAEsARQBZAEwARQBOAD4APABBAEwARwBJAEQAPgBBAEUAUwBDAFQAUgA8AC8AQQBMAEcASQBEAD4APAAvAFAAUgBPAFQARQBDAFQASQBOAEYATwA+ADwATABBAF8AVQBSAEwAPgBoAHQAdABwADoALwAvAGwAcAByAGQAcgBtAC4AeQBlAGwAbwAuAGYAdQB0AC4AdABlAGwAZQBuAGUAdAAtAG8AcABzAC4AYgBlAC8AcAByAGwAYwAvAHIAaQBnAGgAdABzAG0AYQBuAGEAZwBlAHIALgBhAHMAbQB4ADwALwBMAEEAXwBVAFIATAA+ADwATABVAEkAXwBVAFIATAA+AGgAdAB0AHAAOgAvAC8AbABwAHIAZAByAG0ALgB5AGUAbABvAC4AZgB1AHQALgB0AGUAbABlAG4AZQB0AC0AbwBwAHMALgBiAGUALwBwAHIAbABjAC8AcgBpAGcAaAB0AHMAbQBhAG4AYQBnAGUAcgAuAGEAcwBtAHgAPAAvAEwAVQBJAF8AVQBSAEwAPgA8AEQAUwBfAEkARAA+AEkAQwBEAHMASQBlAG8ANgBhAFIAQwBpADMAUQBnAEEASwB6AEEAdwBuAFEAPQA9ADwALwBEAFMAXwBJAEQAPgA8AEsASQBEAD4AMQBXAGoASwA2AFgAdQBhAHAAawBtAHAANgB4ACsARQBJAGEAeABVADQAZwA9AD0APAAvAEsASQBEAD4APABDAEgARQBDAEsAUwBVAE0APgBmAHgAagBwAEMAUwBrADcAMwBZADQAPQA8AC8AQwBIAEUAQwBLAFMAVQBNAD4APAAvAEQAQQBUAEEAPgA8AC8AVwBSAE0ASABFAEEARABFAFIAPgA=</cenc:pssh>
            </ContentProtection>
            <ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed">
                <cenc:pssh>AAAAY3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAEMIARIQ6cpo1Zp7Saap6x+EIaxU4hoLcGFjZXRlbGVuZXQiIGU5Y2E2OGQ1OWE3YjQ5YTZhOWViMWY4NDIxYWM1NGUy</cenc:pssh>
            </ContentProtection>
            <ContentProtection schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc"/>
            <SegmentTemplate timescale="48000" media="S!d2ELREFTSF9IRDEwODASAlT-....ARYEnw__/QualityLevels($Bandwidth$)/Fragments(audio_482_dut=$Time$)" initialization="S!d2ELREFTSF9IRDEwODASAlT-....ARYEnw__/QualityLevels($Bandwidth$)/Fragments(audio_482_dut=Init)">
                <SegmentTimeline>
                    <S t="75418398302636" d="96256" r="1"/>
                    <S d="95232"/>
                    <S d="96256" r="2"/>
                    <S d="95232"/>
                    <S d="96256" r="2"/>
                    <S d="95232"/>
                    <S d="96256" r="2"/>
                    <S d="95232"/>
                </SegmentTimeline>
            </SegmentTemplate>
            <Representation id="dyHiAZ8." bandwidth="128000" codecs="mp4a.40.2" audioSamplingRate="48000"/>
        </AdaptationSet>
    </Period>
</MPD>

该研究的目的是为了使研究人员能够更有效地利用该研究成果，从而使研究人员能够更有效地利用该研究成果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
AAAAY3BZC2GAAAA7E+LQXNWSS6JYCFC1R0H7QAAEMIARIQ6CPO1ZP7SAAP6X+EIAXU4HOLCGFJZXRLBGVUZXQiG5Y2OQ5YTZHOWY4NDIXYWM1NGUY
该研究的目的是为了使研究人员能够更有效地利用该研究成果，从而使研究人员能够更有效地利用该研究成果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
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!--Created with VSPP Streamer version 5.2.4.2 build 95193 context 3374162112732519956-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:cenc="urn:mpeg:cenc:2013" xmlns:mspr="urn:microsoft:playready" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="dynamic" availabilityStartTime="1970-01-01T00:00:00Z" publishTime="2019-10-16T09:04:33Z" timeShiftBufferDepth="PT30S" minimumUpdatePeriod="PT2S" minBufferTime="PT12S">
    <Period id="1" start="PT0S">
        <AdaptationSet id="1" group="1" bitstreamSwitching="true" segmentAlignment="true" contentType="video" mimeType="video/mp4" maxWidth="1024" maxHeight="576" par="16:9" maxFrameRate="25" startWithSAP="1">
            <ContentProtection schemeIdUri="urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95" value="MSPR 2.0">
                <mspr:pro>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</mspr:pro>
                <cenc:pssh>AAADsHBzc2gAAAAAmgTweZhAQoarkuZb4IhflQAAA5CQAwAAAQABAIYDPABXAFIATQBIAEUAQQBEAEUAUgAgAHgAbQBsAG4AcwA9ACIAaAB0AHQAcAA6AC8ALwBzAGMAaABlAG0AYQBzAC4AbQBpAGMAcgBvAHMAbwBmAHQALgBjAG8AbQAvAEQAUgBNAC8AMgAwADAANwAvADAAMwAvAFAAbABhAHkAUgBlAGEAZAB5AEgAZQBhAGQAZQByACIAIAB2AGUAcgBzAGkAbwBuAD0AIgA0AC4AMAAuADAALgAwACIAPgA8AEQAQQBUAEEAPgA8AFAAUgBPAFQARQBDAFQASQBOAEYATwA+ADwASwBFAFkATABFAE4APgAxADYAPAAvAEsARQBZAEwARQBOAD4APABBAEwARwBJAEQAPgBBAEUAUwBDAFQAUgA8AC8AQQBMAEcASQBEAD4APAAvAFAAUgBPAFQARQBDAFQASQBOAEYATwA+ADwATABBAF8AVQBSAEwAPgBoAHQAdABwADoALwAvAGwAcAByAGQAcgBtAC4AeQBlAGwAbwAuAGYAdQB0AC4AdABlAGwAZQBuAGUAdAAtAG8AcABzAC4AYgBlAC8AcAByAGwAYwAvAHIAaQBnAGgAdABzAG0AYQBuAGEAZwBlAHIALgBhAHMAbQB4ADwALwBMAEEAXwBVAFIATAA+ADwATABVAEkAXwBVAFIATAA+AGgAdAB0AHAAOgAvAC8AbABwAHIAZAByAG0ALgB5AGUAbABvAC4AZgB1AHQALgB0AGUAbABlAG4AZQB0AC0AbwBwAHMALgBiAGUALwBwAHIAbABjAC8AcgBpAGcAaAB0AHMAbQBhAG4AYQBnAGUAcgAuAGEAcwBtAHgAPAAvAEwAVQBJAF8AVQBSAEwAPgA8AEQAUwBfAEkARAA+AEkAQwBEAHMASQBlAG8ANgBhAFIAQwBpADMAUQBnAEEASwB6AEEAdwBuAFEAPQA9ADwALwBEAFMAXwBJAEQAPgA8AEsASQBEAD4AMQBXAGoASwA2AFgAdQBhAHAAawBtAHAANgB4ACsARQBJAGEAeABVADQAZwA9AD0APAAvAEsASQBEAD4APABDAEgARQBDAEsAUwBVAE0APgBmAHgAagBwAEMAUwBrADcAMwBZADQAPQA8AC8AQwBIAEUAQwBLAFMAVQBNAD4APAAvAEQAQQBUAEEAPgA8AC8AVwBSAE0ASABFAEEARABFAFIAPgA=</cenc:pssh>
            </ContentProtection>
            <ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed">
                <cenc:pssh>AAAAY3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAEMIARIQ6cpo1Zp7Saap6x+EIaxU4hoLcGFjZXRlbGVuZXQiIGU5Y2E2OGQ1OWE3YjQ5YTZhOWViMWY4NDIxYWM1NGUy</cenc:pssh>
            </ContentProtection>
            <ContentProtection schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc"/>
            <SegmentTemplate timescale="10000000" media="S!d2ELREFTSF9IRDEwODASAlT-....ARYEnw__/QualityLevels($Bandwidth$)/Fragments(video=$Time$)" initialization="S!d2ELREFTSF9IRDEwODASAlT-....ARYEnw__/QualityLevels($Bandwidth$)/Fragments(video=Init)">
                <SegmentTimeline>
                    <S t="15712166312942690" d="20000000" r="14"/>
                </SegmentTimeline>
            </SegmentTemplate>
            <Representation id="dzGAGgaf" bandwidth="400000" codecs="avc1.42e00d" width="400" height="224" frameRate="25" sar="1:1"/>
            <Representation id="dzEANQyf" bandwidth="800000" codecs="avc1.4d401e" width="640" height="360" frameRate="25" sar="1:1"/>
            <Representation id="dzHgyBCf" bandwidth="1100000" codecs="avc1.4d401e" width="704" height="396" frameRate="25" sar="1:1"/>
            <Representation id="dzEAahif" bandwidth="1600000" codecs="avc1.4d401f" width="1024" height="576" frameRate="25" sar="1:1"/>
        </AdaptationSet>
        <AdaptationSet id="2" group="2" bitstreamSwitching="true" segmentAlignment="true" contentType="audio" mimeType="audio/mp4" lang="dut">
            <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
            <ContentProtection schemeIdUri="urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95" value="MSPR 2.0">
                <mspr:pro>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</mspr:pro>
                <cenc:pssh>AAADsHBzc2gAAAAAmgTweZhAQoarkuZb4IhflQAAA5CQAwAAAQABAIYDPABXAFIATQBIAEUAQQBEAEUAUgAgAHgAbQBsAG4AcwA9ACIAaAB0AHQAcAA6AC8ALwBzAGMAaABlAG0AYQBzAC4AbQBpAGMAcgBvAHMAbwBmAHQALgBjAG8AbQAvAEQAUgBNAC8AMgAwADAANwAvADAAMwAvAFAAbABhAHkAUgBlAGEAZAB5AEgAZQBhAGQAZQByACIAIAB2AGUAcgBzAGkAbwBuAD0AIgA0AC4AMAAuADAALgAwACIAPgA8AEQAQQBUAEEAPgA8AFAAUgBPAFQARQBDAFQASQBOAEYATwA+ADwASwBFAFkATABFAE4APgAxADYAPAAvAEsARQBZAEwARQBOAD4APABBAEwARwBJAEQAPgBBAEUAUwBDAFQAUgA8AC8AQQBMAEcASQBEAD4APAAvAFAAUgBPAFQARQBDAFQASQBOAEYATwA+ADwATABBAF8AVQBSAEwAPgBoAHQAdABwADoALwAvAGwAcAByAGQAcgBtAC4AeQBlAGwAbwAuAGYAdQB0AC4AdABlAGwAZQBuAGUAdAAtAG8AcABzAC4AYgBlAC8AcAByAGwAYwAvAHIAaQBnAGgAdABzAG0AYQBuAGEAZwBlAHIALgBhAHMAbQB4ADwALwBMAEEAXwBVAFIATAA+ADwATABVAEkAXwBVAFIATAA+AGgAdAB0AHAAOgAvAC8AbABwAHIAZAByAG0ALgB5AGUAbABvAC4AZgB1AHQALgB0AGUAbABlAG4AZQB0AC0AbwBwAHMALgBiAGUALwBwAHIAbABjAC8AcgBpAGcAaAB0AHMAbQBhAG4AYQBnAGUAcgAuAGEAcwBtAHgAPAAvAEwAVQBJAF8AVQBSAEwAPgA8AEQAUwBfAEkARAA+AEkAQwBEAHMASQBlAG8ANgBhAFIAQwBpADMAUQBnAEEASwB6AEEAdwBuAFEAPQA9ADwALwBEAFMAXwBJAEQAPgA8AEsASQBEAD4AMQBXAGoASwA2AFgAdQBhAHAAawBtAHAANgB4ACsARQBJAGEAeABVADQAZwA9AD0APAAvAEsASQBEAD4APABDAEgARQBDAEsAUwBVAE0APgBmAHgAagBwAEMAUwBrADcAMwBZADQAPQA8AC8AQwBIAEUAQwBLAFMAVQBNAD4APAAvAEQAQQBUAEEAPgA8AC8AVwBSAE0ASABFAEEARABFAFIAPgA=</cenc:pssh>
            </ContentProtection>
            <ContentProtection schemeIdUri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed">
                <cenc:pssh>AAAAY3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAEMIARIQ6cpo1Zp7Saap6x+EIaxU4hoLcGFjZXRlbGVuZXQiIGU5Y2E2OGQ1OWE3YjQ5YTZhOWViMWY4NDIxYWM1NGUy</cenc:pssh>
            </ContentProtection>
            <ContentProtection schemeIdUri="urn:mpeg:dash:mp4protection:2011" value="cenc"/>
            <SegmentTemplate timescale="48000" media="S!d2ELREFTSF9IRDEwODASAlT-....ARYEnw__/QualityLevels($Bandwidth$)/Fragments(audio_482_dut=$Time$)" initialization="S!d2ELREFTSF9IRDEwODASAlT-....ARYEnw__/QualityLevels($Bandwidth$)/Fragments(audio_482_dut=Init)">
                <SegmentTimeline>
                    <S t="75418398302636" d="96256" r="1"/>
                    <S d="95232"/>
                    <S d="96256" r="2"/>
                    <S d="95232"/>
                    <S d="96256" r="2"/>
                    <S d="95232"/>
                    <S d="96256" r="2"/>
                    <S d="95232"/>
                </SegmentTimeline>
            </SegmentTemplate>
            <Representation id="dyHiAZ8." bandwidth="128000" codecs="mp4a.40.2" audioSamplingRate="48000"/>
        </AdaptationSet>
    </Period>
</MPD>