Different role flags combined in one TrackGroup #2148
Description
Hello
I have this Question to make for some time now about this error playing an MPD
``
java.lang.IllegalStateException: Different role flags combined in one TrackGroup: '0' (track 0) and '100000000000010' (track 1)
at androidx.media3.common.TrackGroup.logErrorMessage(TrackGroup.java:233)
at androidx.media3.common.TrackGroup.verifyCorrectness(TrackGroup.java:208)
at androidx.media3.common.TrackGroup.(TrackGroup.java:96)
at androidx.media3.exoplayer.dash.DashMediaPeriod.buildPrimaryAndEmbeddedTrackGroupInfos(DashMediaPeriod.java:708)
at androidx.media3.exoplayer.dash.DashMediaPeriod.buildTrackGroups(DashMediaPeriod.java:529)
at androidx.media3.exoplayer.dash.DashMediaPeriod.(DashMediaPeriod.java:160)
at androidx.media3.exoplayer.dash.DashMediaSource.createPeriod(DashMediaSource.java:580)
at androidx.media3.exoplayer.source.MaskingMediaPeriod.createPeriod(MaskingMediaPeriod.java:131)
at androidx.media3.exoplayer.source.MaskingMediaSource.onChildSourceInfoRefreshed(MaskingMediaSource.java:214)
at androidx.media3.exoplayer.source.WrappingMediaSource.onChildSourceInfoRefreshed(WrappingMediaSource.java:154)
at androidx.media3.exoplayer.source.WrappingMediaSource.onChildSourceInfoRefreshed(WrappingMediaSource.java:49)
at androidx.media3.exoplayer.source.CompositeMediaSource.lambda$prepareChildSource$0$androidx-media3-exoplayer-source-CompositeMediaSource(CompositeMediaSource.java:117)
at androidx.media3.exoplayer.source.CompositeMediaSource$$ExternalSyntheticLambda0.onSourceInfoRefreshed(D8$$SyntheticClass:0)
at androidx.media3.exoplayer.source.BaseMediaSource.refreshSourceInfo(BaseMediaSource.java:90)
at androidx.media3.exoplayer.dash.DashMediaSource.processManifest(DashMediaSource.java:937)
at androidx.media3.exoplayer.dash.DashMediaSource.onUtcTimestampResolved(DashMediaSource.java:864)
at androidx.media3.exoplayer.dash.DashMediaSource.access$500(DashMediaSource.java:99)
at androidx.media3.exoplayer.dash.DashMediaSource$1.onInitialized(DashMediaSource.java:852)
at androidx.media3.exoplayer.util.SntpClient$NtpTimeCallback.onLoadCompleted(SntpClient.java:325)
at androidx.media3.exoplayer.upstream.Loader$LoadTask.handleMessage(Loader.java:487)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.os.HandlerThread.run(HandlerThread.java:67)
The MPD xml have the following AdaptationSets, Representations and Roles ( removed some xml to make it better readable it contains DRM )
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:cenc="urn:mpeg:cenc:2013"
xmlns:mspr="urn:microsoft:playready"
profiles="urn:mpeg:dash:profile:isoff-live:2011"
type="dynamic"
availabilityStartTime="1970-01-01T00:00:00Z"
publishTime="2025-02-15T01:56:56Z"
timeShiftBufferDepth="PT20S"
minimumUpdatePeriod="PT2S"
maxSegmentDuration="PT2.006S"
minBufferTime="PT6S">
<Period id="1" start="PT0S">
<AdaptationSet id="1" group="1" bitstreamSwitching="true" segmentAlignment="true" contentType="video" mimeType="video/mp4" maxWidth="1280" maxHeight="720" par="16:9" maxFrameRate="50" startWithSAP="1">
<SegmentTemplate timescale="10000000" media="S!d2EPREFTSF9BVkNfRlVMTEhEEgJU.v...wEWBJ8_/QualityLevels($Bandwidth$)/Fragments(video=$Time$)">
<SegmentTimeline>
<S t="17395845890304560" d="20000000" r="9"/>
</SegmentTimeline>
</SegmentTemplate>
<Representation id="dzEUrgef" bandwidth="503316" codecs="avc1.4d4029" width="384" height="216" frameRate="25" sar="1:1"/>
<Representation id="dzF6FA6f" bandwidth="922746" codecs="avc1.4d4029" width="640" height="360" frameRate="25" sar="1:1"/>
<Representation id="dzHhehif" bandwidth="1604321" codecs="avc1.4d4029" width="704" height="396" frameRate="25" sar="1:1"/>
<Representation id="dzEAADCf" bandwidth="3145728" codecs="avc1.640029" width="1280" height="720" frameRate="50" sar="1:1"/>
</AdaptationSet>
<AdaptationSet id="2" group="32" bitstreamSwitching="true" segmentAlignment="true" contentType="video" mimeType="video/mp4" maxWidth="1280" maxHeight="720" par="16:9" maxFrameRate="50" startWithSAP="1" codingDependency="false">
<EssentialProperty schemeIdUri="http://dashif.org/guidelines/trickmode" value="1"/>
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="alternate"/>
<SegmentTemplate timescale="10000000" media="S!d2EPREFTSF9BVkNfRlVMTEhEEgJU.v...wEWBJ8_/QualityLevels($Bandwidth$)/Fragments(trickmode=$Time$)">
<SegmentTimeline>
<S t="17395845890304560" d="20000000" r="9"/>
</SegmentTimeline>
</SegmentTemplate>
<Representation id="trickmodedzEUrgef" bandwidth="503316" codecs="avc1.4d4029" width="384" height="216" frameRate="1" sar="1:1" maxPlayoutRate="25"/>
<Representation id="trickmodedzF6FA6f" bandwidth="922746" codecs="avc1.4d4029" width="640" height="360" frameRate="1" sar="1:1" maxPlayoutRate="25"/>
<Representation id="trickmodedzHhehif" bandwidth="1604321" codecs="avc1.4d4029" width="704" height="396" frameRate="1" sar="1:1" maxPlayoutRate="25"/>
<Representation id="trickmodedzEAADCf" bandwidth="3145728" codecs="avc1.640029" width="1280" height="720" frameRate="1" sar="1:1" maxPlayoutRate="50"/>
</AdaptationSet>
<AdaptationSet id="3" group="2" bitstreamSwitching="true" segmentAlignment="true" contentType="audio" mimeType="audio/mp4" lang="por">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="main"/>
<SegmentTemplate timescale="48000" media="S!d2EPREFTSF9BVkNfRlVMTEhEEgJU.v...wEWBJ8_/QualityLevels($Bandwidth$)/Fragments(audio_482_por=$Time$)">
<SegmentTimeline>
<S t="83500060274012" d="96256"/>
<S d="95232"/>
<S d="96256" r="2"/>
<S d="95232"/>
<S d="96256" r="2"/>
<S d="95232"/>
</SegmentTimeline>
</SegmentTemplate>
<Representation id="dyHiAZ8." bandwidth="96000" codecs="mp4a.40.2" audioSamplingRate="48000"/>
</AdaptationSet>
<AdaptationSet id="4" group="2" bitstreamSwitching="true" segmentAlignment="true" contentType="audio" mimeType="audio/mp4" lang="AUD">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="alternate"/>
<SegmentTemplate timescale="48000" media="S!d2EPREFTSF9BVkNfRlVMTEhEEgJU.v...wEWBJ8_/QualityLevels($Bandwidth$)/Fragments(audio_483_AUD=$Time$)">
<SegmentTimeline>
<S t="83500060274012" d="96256"/>
<S d="95232"/>
<S d="96256" r="2"/>
<S d="95232"/>
<S d="96256" r="2"/>
<S d="95232"/>
</SegmentTimeline>
</SegmentTemplate>
<Representation id="dyHjAZ8." bandwidth="96000" codecs="mp4a.40.2" audioSamplingRate="48000"/>
</AdaptationSet>
<AdaptationSet id="5" group="8" bitstreamSwitching="true" segmentAlignment="true" contentType="text" mimeType="application/mp4" lang="887">
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="alternate"/>
<SegmentTemplate timescale="10000000" media="S!d2EPREFTSF9BVkNfRlVMTEhEEgJU.v...wEWBJ8_/QualityLevels($Bandwidth$)/Fragments(887_0=$Time$)">
<SegmentTimeline>
<S t="17395845890304560" d="20000000" r="9"/>
</SegmentTimeline>
</SegmentTemplate>
<Representation id="dxFknw.." bandwidth="100" codecs="stpp"/>
</AdaptationSet>
<AdaptationSet id="6" group="8" bitstreamSwitching="true" segmentAlignment="true" contentType="text" mimeType="application/mp4" lang="885">
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="alternate"/>
<SegmentTemplate timescale="10000000" media="S!d2EPREFTSF9BVkNfRlVMTEhEEgJU.v...wEWBJ8_/QualityLevels($Bandwidth$)/Fragments(885_1=$Time$)">
<SegmentTimeline>
<S t="17395845890304560" d="20000000" r="9"/>
</SegmentTimeline>
</SegmentTemplate>
<Representation id="dxFlnw.." bandwidth="101" codecs="stpp"/>
</AdaptationSet>
</Period>
</MPD>
I don't understand exactly what the error means and if this can be "ignored"
I did search before come here and didnt find anything related to this, i saw that the expection is not throwing error it just print the error but the video is not playing.
I know that editing the mpd on-fly works by creating a custom datasource to remove the <Role tags... but is that the only way? :(