Merge pull request #4240 from Bnyro/audio-track-types

Support for different audio track types
2024-12-14 22:30:30 +05:30 · 2023-07-16 20:12:48 +02:00 · 2023-07-16 20:12:48 +02:00 · 1fd905222d
commit 1fd905222d
parent 3d702418ce 6fc4c9e406
46 changed files with 558 additions and 79 deletions
--- a/app/src/main/java/com/github/libretube/api/obj/PipedStream.kt
+++ b/app/src/main/java/com/github/libretube/api/obj/PipedStream.kt
@ -24,7 +24,9 @@ data class PipedStream(
    val fps: Int? = null,
    val audioTrackName: String? = null,
    val audioTrackId: String? = null,
-    val contentLength: Long = -1
+    val contentLength: Long = -1,
+    val audioTrackType: String? = null,
+    val audioTrackLocale: String? = null
 ) {
    private fun getQualityString(fileName: String): String {
        return "${fileName}_${quality?.replace(" ", "_")}_$format." +
--- a/app/src/main/java/com/github/libretube/helpers/DashHelper.kt
+++ b/app/src/main/java/com/github/libretube/helpers/DashHelper.kt
@ -19,8 +19,10 @@ object DashHelper {

    private data class AdapSetInfo(
        val mimeType: String,
+        val formats: MutableList<PipedStream> = mutableListOf(),
        val audioTrackId: String? = null,
-        val formats: MutableList<PipedStream> = mutableListOf()
+        val audioTrackType: String? = null,
+        val audioLocale: String? = null
    )

    fun createManifest(
@ -75,7 +77,6 @@ object DashHelper {
                adapSetInfos.add(
                    AdapSetInfo(
                        stream.mimeType!!,
-                        null,
                        mutableListOf(stream)
                    )
                )
@ -94,8 +95,10 @@ object DashHelper {
            adapSetInfos.add(
                AdapSetInfo(
                    stream.mimeType!!,
+                    mutableListOf(stream),
                    stream.audioTrackId,
-                    mutableListOf(stream)
+                    stream.audioTrackType,
+                    stream.audioTrackLocale
                )
            )
        }
@ -105,8 +108,24 @@ object DashHelper {
            adapSetElement.setAttribute("mimeType", adapSet.mimeType)
            adapSetElement.setAttribute("startWithSAP", "1")
            adapSetElement.setAttribute("subsegmentAlignment", "true")
+
            if (adapSet.audioTrackId != null) {
                adapSetElement.setAttribute("lang", adapSet.audioTrackId.substring(0, 2))
+            } else if (adapSet.audioLocale != null) {
+                adapSetElement.setAttribute("lang", adapSet.audioLocale)
+            }
+
+            // Only add the Role element if there is a track type set
+            // This allows distinction between formats marked as original on YouTube and
+            // formats without track type info set
+            if (adapSet.audioTrackType != null) {
+                val roleElement = doc.createElement("Role")
+                roleElement.setAttribute("schemeIdUri", "urn:mpeg:dash:role:2011")
+                roleElement.setAttribute(
+                    "value",
+                    getRoleValueFromAudioTrackType(adapSet.audioTrackType)
+                )
+                adapSetElement.appendChild(roleElement)
            }

            val isVideo = adapSet.mimeType.contains("video")
@ -162,18 +181,34 @@ object DashHelper {
        val baseUrl = doc.createElement("BaseURL")
        baseUrl.appendChild(doc.createTextNode(ProxyHelper.unwrapUrl(stream.url!!, rewriteUrls)))

-        val segmentBase = doc.createElement("SegmentBase")
+        representation.appendChild(audioChannelConfiguration)
+        representation.appendChild(baseUrl)
+        representation.appendChild(createSegmentBaseElement(doc, stream))
+
+        return representation
+    }
+
+    private fun createSegmentBaseElement(
+        document: Document,
+        stream: PipedStream
+    ): Element {
+        val segmentBase = document.createElement("SegmentBase")
        segmentBase.setAttribute("indexRange", "${stream.indexStart}-${stream.indexEnd}")

-        val initialization = doc.createElement("Initialization")
+        val initialization = document.createElement("Initialization")
        initialization.setAttribute("range", "${stream.initStart}-${stream.initEnd}")
        segmentBase.appendChild(initialization)

-        representation.appendChild(audioChannelConfiguration)
-        representation.appendChild(baseUrl)
-        representation.appendChild(segmentBase)
+        return segmentBase
+    }

-        return representation
+    private fun getRoleValueFromAudioTrackType(audioTrackType: String): String {
+        return when (audioTrackType.lowercase()) {
+            "descriptive" -> "description"
+            "dubbed" -> "dub"
+            "original" -> "main"
+            else -> "alternate"
+        }
    }

    private fun createVideoRepresentation(
--- a/app/src/main/java/com/github/libretube/helpers/PlayerHelper.kt
+++ b/app/src/main/java/com/github/libretube/helpers/PlayerHelper.kt
@ -23,6 +23,7 @@ import androidx.core.view.children
 import androidx.media3.common.AudioAttributes
 import androidx.media3.common.C
 import androidx.media3.common.PlaybackParameters
+import androidx.media3.common.Tracks
 import androidx.media3.exoplayer.DefaultLoadControl
 import androidx.media3.exoplayer.ExoPlayer
 import androidx.media3.exoplayer.LoadControl
@ -39,6 +40,7 @@ import com.github.libretube.enums.SbSkipOptions
 import com.github.libretube.obj.PreviewFrame
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import kotlinx.coroutines.runBlocking
+import java.util.Locale
 import kotlin.math.absoluteValue
 import kotlin.math.roundToInt

@ -579,4 +581,140 @@ object PlayerHelper {
        }
        return null
    }
+
+    /**
+     * Get the track type string resource corresponding to ExoPlayer role flags used for audio
+     * track types.
+     *
+     * If the role flags doesn't have any role flags used for audio track types, the string
+     * resource `unknown_audio_track_type` is returned.
+     *
+     * @param context   a context to get the string resources used to build the audio track type
+     * @param roleFlags the ExoPlayer role flags from which the audio track type will be returned
+     * @return the track type string resource corresponding to an ExoPlayer role flag or the
+     * `unknown_audio_track_type` one if no role flags corresponding to the ones used for audio
+     * track types is set
+     */
+    private fun getDisplayAudioTrackTypeFromFormat(
+        context: Context,
+        @C.RoleFlags roleFlags: Int
+    ): String {
+        // These role flags should not be set together, so the first role only take into account
+        // flag which matches
+        return when {
+            // If the flag ROLE_FLAG_DESCRIBES_VIDEO is set, return the descriptive_audio_track
+            // string resource
+            roleFlags and C.ROLE_FLAG_DESCRIBES_VIDEO == C.ROLE_FLAG_DESCRIBES_VIDEO ->
+                context.getString(R.string.descriptive_audio_track)
+
+            // If the flag ROLE_FLAG_DESCRIBES_VIDEO is set, return the dubbed_audio_track
+            // string resource
+            roleFlags and C.ROLE_FLAG_DUB == C.ROLE_FLAG_DUB ->
+                context.getString(R.string.dubbed_audio_track)
+
+            // If the flag ROLE_FLAG_DESCRIBES_VIDEO is set, return the original_or_main_audio_track
+            // string resource
+            roleFlags and C.ROLE_FLAG_MAIN == C.ROLE_FLAG_MAIN ->
+                context.getString(R.string.original_or_main_audio_track)
+
+            // Return the unknown_audio_track_type string resource for any other value
+            else -> context.getString(R.string.unknown_audio_track_type)
+        }
+    }
+
+    /**
+     * Get an audio track name from an audio format, using its language tag and its role flags.
+     *
+     * If the given language is `null`, the string resource `unknown_audio_language` is used
+     * instead and when the given role flags have no track type value used by the app, the string
+     * resource `unknown_audio_track_type` is used instead.
+     *
+     * @param context                   a context to get the string resources used to build the
+     *                                  audio track name
+     * @param audioLanguageAndRoleFlags a pair of an audio format language tag and role flags from
+     *                                  which the audio track name will be built
+     * @return an audio track name of an audio format language and role flags, localized according
+     * to the language preferences of the user
+     */
+    fun getAudioTrackNameFromFormat(
+        context: Context,
+        audioLanguageAndRoleFlags: Pair<String?, @C.RoleFlags Int>
+    ): String {
+        val audioLanguage = audioLanguageAndRoleFlags.first
+        return context.getString(R.string.audio_track_format)
+            .format(
+                if (audioLanguage == null) context.getString(R.string.unknown_audio_language)
+                else Locale.forLanguageTag(audioLanguage)
+                    .getDisplayLanguage(
+                        LocaleHelper.getAppLocale()
+                    )
+                    .ifEmpty { context.getString(R.string.unknown_audio_language) },
+                getDisplayAudioTrackTypeFromFormat(context, audioLanguageAndRoleFlags.second)
+            )
+    }
+
+    /**
+     * Get audio languages with their role flags of supported formats from ExoPlayer track groups
+     * and only the selected ones if requested.
+     *
+     * Duplicate audio languages with their role flags are removed.
+     *
+     * @param groups                 the list of [Group]s of the current tracks played by the player
+     * @param keepOnlySelectedTracks whether to get only the selected audio languages with their
+     *                               role flags among the supported ones
+     * @return a list of distinct audio languages with their role flags from the supported formats
+     * of the given track groups and only the selected ones if requested
+     */
+    fun getAudioLanguagesAndRoleFlagsFromTrackGroups(
+        groups: List<Tracks.Group>,
+        keepOnlySelectedTracks: Boolean
+    ): List<Pair<String?, @C.RoleFlags Int>> {
+        // Filter unsupported tracks and keep only selected tracks if requested
+        // Use a lambda expression to avoid checking on each audio format if we keep only selected
+        // tracks or not
+        val trackFilter = if (keepOnlySelectedTracks)
+            { group: Tracks.Group, trackIndex: Int ->
+                group.isTrackSupported(trackIndex) && group.isTrackSelected(
+                    trackIndex
+                )
+            } else { group: Tracks.Group, trackIndex: Int -> group.isTrackSupported(trackIndex) }
+
+        return groups.filter {
+            it.type == C.TRACK_TYPE_AUDIO
+        }.flatMap { group ->
+            (0 until group.length).filter {
+                trackFilter(group, it)
+            }.map { group.getTrackFormat(it) }
+        }.map { format ->
+            format.language to format.roleFlags
+        }.distinct()
+    }
+
+    /**
+     * Check whether the given flag is set in the given bitfield.
+     *
+     * @param bitField a bitfield
+     * @param flag     a flag to check its presence in the given bitfield
+     * @return whether the given flag is set in the given bitfield
+     */
+    private fun isFlagSet(bitField: Int, flag: Int): Boolean {
+        return bitField and flag == flag;
+    }
+
+    /**
+     * Check whether the given ExoPlayer role flags contain at least one flag used for audio
+     * track types.
+     *
+     * ExoPlayer role flags currently used for audio track types are [C.ROLE_FLAG_DESCRIBES_VIDEO],
+     * [C.ROLE_FLAG_DUB], [C.ROLE_FLAG_MAIN] and [C.ROLE_FLAG_ALTERNATE].
+     *
+     * @param roleFlags the ExoPlayer role flags to check, an int representing a bitfield
+     * @return whether the provided ExoPlayer flags contain a flag used for audio track types
+     */
+    fun haveAudioTrackRoleFlagSet(@C.RoleFlags roleFlags: Int): Boolean {
+        return isFlagSet(roleFlags, C.ROLE_FLAG_DESCRIBES_VIDEO)
+                || isFlagSet(roleFlags, C.ROLE_FLAG_DUB)
+                || isFlagSet(roleFlags, C.ROLE_FLAG_MAIN)
+                || isFlagSet(roleFlags, C.ROLE_FLAG_ALTERNATE)
+    }
 }
--- a/app/src/main/java/com/github/libretube/ui/fragments/PlayerFragment.kt
+++ b/app/src/main/java/com/github/libretube/ui/fragments/PlayerFragment.kt
@ -46,6 +46,7 @@ import androidx.media3.common.Player
 import androidx.media3.datasource.DefaultDataSource
 import androidx.media3.datasource.cronet.CronetDataSource
 import androidx.media3.exoplayer.ExoPlayer
+import androidx.media3.exoplayer.hls.HlsMediaSource
 import androidx.media3.exoplayer.source.DefaultMediaSourceFactory
 import androidx.media3.exoplayer.trackselection.DefaultTrackSelector
 import androidx.recyclerview.widget.LinearLayoutManager
@ -55,7 +56,6 @@ import com.github.libretube.api.JsonHelper
 import com.github.libretube.api.RetrofitInstance
 import com.github.libretube.api.obj.ChapterSegment
 import com.github.libretube.api.obj.Message
-import com.github.libretube.api.obj.PipedStream
 import com.github.libretube.api.obj.Segment
 import com.github.libretube.api.obj.StreamItem
 import com.github.libretube.api.obj.Streams
@ -113,15 +113,16 @@ import com.github.libretube.util.NowPlayingNotification
 import com.github.libretube.util.PlayingQueue
 import com.github.libretube.util.TextUtils
 import com.github.libretube.util.TextUtils.toTimeInSeconds
-import java.io.IOException
-import java.util.*
-import java.util.concurrent.Executors
+import com.github.libretube.util.YoutubeHlsPlaylistParser
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import kotlinx.serialization.encodeToString
 import retrofit2.HttpException
+import java.io.IOException
+import java.util.*
+import java.util.concurrent.Executors
 import kotlin.math.abs

@androidx.annotation.OptIn(androidx.media3.common.util.UnstableApi::class)
@ -164,6 +165,11 @@ class PlayerFragment : Fragment(), OnlinePlayerOptions {
    private lateinit var trackSelector: DefaultTrackSelector
    private var captionLanguage: String? = PlayerHelper.defaultSubtitleCode

+    private val cronetDataSourceFactory = CronetDataSource.Factory(
+        CronetHelper.cronetEngine,
+        Executors.newCachedThreadPool()
+    )
+
    /**
     * Chapters and comments
     */
@ -1189,13 +1195,15 @@ class PlayerFragment : Fragment(), OnlinePlayerOptions {
        }
    }

+    private fun createMediaItem(uri: Uri, mimeType: String) = MediaItem.Builder()
+        .setUri(uri)
+        .setMimeType(mimeType)
+        .setSubtitleConfigurations(subtitles)
+        .setMetadata(streams)
+        .build()
+
    private fun setMediaSource(uri: Uri, mimeType: String) {
-        val mediaItem = MediaItem.Builder()
-            .setUri(uri)
-            .setMimeType(mimeType)
-            .setSubtitleConfigurations(subtitles)
-            .setMetadata(streams)
-            .build()
+        val mediaItem = createMediaItem(uri, mimeType)
        exoPlayer.setMediaItem(mediaItem)
    }

@ -1307,6 +1315,16 @@ class PlayerFragment : Fragment(), OnlinePlayerOptions {
            }
            // HLS
            streams.hls != null -> {
+                val hlsMediaSourceFactory = HlsMediaSource.Factory(cronetDataSourceFactory)
+                    .setPlaylistParserFactory(YoutubeHlsPlaylistParser.Factory())
+
+                val mediaSource = hlsMediaSourceFactory.createMediaSource(
+                    createMediaItem(
+                        ProxyHelper.unwrapStreamUrl(streams.hls!!).toUri(),
+                        MimeTypes.APPLICATION_M3U8,
+                    )
+                )
+                exoPlayer.setMediaSource(mediaSource)
                ProxyHelper.unwrapStreamUrl(streams.hls!!).toUri() to MimeTypes.APPLICATION_M3U8
            }
            // NO STREAM FOUND
@ -1329,9 +1347,7 @@ class PlayerFragment : Fragment(), OnlinePlayerOptions {
        trackSelector = DefaultTrackSelector(requireContext())

        trackSelector.updateParameters {
-            setPreferredAudioLanguage(
-                LocaleHelper.getAppLocale().language.lowercase().substring(0, 2)
-            )
+            setPreferredAudioLanguage(LocaleHelper.getAppLocale().isO3Language)
        }

        exoPlayer = ExoPlayer.Builder(requireContext())
@ -1414,24 +1430,46 @@ class PlayerFragment : Fragment(), OnlinePlayerOptions {
            .show(childFragmentManager)
    }

-    private fun getAudioStreamGroups(audioStreams: List<PipedStream>?): Map<String?, List<PipedStream>> {
-        return audioStreams.orEmpty()
-            .groupBy { it.audioTrackName }
-    }
-
    override fun onAudioStreamClicked() {
-        val audioGroups = getAudioStreamGroups(streams.audioStreams)
-        val audioLanguages = audioGroups.map { it.key ?: getString(R.string.default_audio_track) }
+        val context = requireContext()
+        val audioLanguagesAndRoleFlags = PlayerHelper.getAudioLanguagesAndRoleFlagsFromTrackGroups(
+            exoPlayer.currentTracks.groups, false
+        )
+        val audioLanguages = audioLanguagesAndRoleFlags.map {
+            PlayerHelper.getAudioTrackNameFromFormat(context, it)
+        }
+        val baseBottomSheet = BaseBottomSheet()

-        BaseBottomSheet()
-            .setSimpleItems(audioLanguages) { index ->
-                val audioStreams = audioGroups.values.elementAt(index)
-                val lang = audioStreams.firstOrNull()?.audioTrackId?.substring(0, 2)
+        if (audioLanguagesAndRoleFlags.isEmpty()) {
+            baseBottomSheet.setSimpleItems(
+                listOf(context.getString(R.string.unknown_or_no_audio)),
+                null
+            )
+        } else if (audioLanguagesAndRoleFlags.size == 1
+            && audioLanguagesAndRoleFlags[0].first == null
+            && !PlayerHelper.haveAudioTrackRoleFlagSet(
+                audioLanguagesAndRoleFlags[0].second
+            )
+        ) {
+            // Regardless of audio format or quality, if there is only one audio stream which has
+            // no language and no role flags, it should mean that there is only a single audio
+            // track which has no language or track type set in the video played
+            // Consider it as the default audio track (or unknown)
+            baseBottomSheet.setSimpleItems(
+                listOf(context.getString(R.string.default_or_unknown_audio_track)),
+                null
+            )
+        } else {
+            baseBottomSheet.setSimpleItems(audioLanguages) { index ->
+                val selectedAudioFormat = audioLanguagesAndRoleFlags[index]
                trackSelector.updateParameters {
-                    setPreferredAudioLanguage(lang)
+                    setPreferredAudioLanguage(selectedAudioFormat.first)
+                    setPreferredAudioRoleFlags(selectedAudioFormat.second)
                }
            }
-            .show(childFragmentManager)
+        }
+
+        baseBottomSheet.show(childFragmentManager)
    }

    override fun onStatsClicked() {
--- a/app/src/main/java/com/github/libretube/ui/views/OnlinePlayerView.kt
+++ b/app/src/main/java/com/github/libretube/ui/views/OnlinePlayerView.kt
@ -39,9 +39,7 @@ class OnlinePlayerView(
                    BottomSheetItem(
                        context.getString(R.string.audio_track),
                        R.drawable.ic_audio,
-                        {
-                            trackSelector?.parameters?.preferredAudioLanguages?.firstOrNull()
-                        }
+                        { getCurrentAudioTrackTitle() }
                    ) {
                        playerOptions?.onAudioStreamClicked()
                    },
@ -67,6 +65,47 @@ class OnlinePlayerView(
                )
    }

+    private fun getCurrentAudioTrackTitle(): String {
+        if (player == null) {
+            return context.getString(R.string.unknown_or_no_audio)
+        }
+
+        // The player reference should be not changed between the null check
+        // and its access, so a non null assertion should be safe here
+        val selectedAudioLanguagesAndRoleFlags =
+            PlayerHelper.getAudioLanguagesAndRoleFlagsFromTrackGroups(
+                player!!.currentTracks.groups,
+                true
+            )
+
+        if (selectedAudioLanguagesAndRoleFlags.isEmpty()) {
+            return context.getString(R.string.unknown_or_no_audio)
+        }
+
+        // At most one audio track should be selected regardless of audio
+        // format or quality
+        val firstSelectedAudioFormat = selectedAudioLanguagesAndRoleFlags[0]
+
+        if (selectedAudioLanguagesAndRoleFlags.size == 1
+            && firstSelectedAudioFormat.first == null
+            && !PlayerHelper.haveAudioTrackRoleFlagSet(
+                firstSelectedAudioFormat.second
+            )
+        ) {
+            // Regardless of audio format or quality, if there is only one
+            // audio stream which has no language and no role flags, it
+            // should mean that there is only a single audio track which
+            // has no language or track type set in the video played
+            // Consider it as the default audio track (or unknown)
+            return context.getString(R.string.default_or_unknown_audio_track)
+        }
+
+        return PlayerHelper.getAudioTrackNameFromFormat(
+            context,
+            firstSelectedAudioFormat
+        )
+    }
+
    fun initPlayerOptions(
        playerViewModel: PlayerViewModel,
        viewLifecycleOwner: LifecycleOwner,
--- a/app/src/main/java/com/github/libretube/util/YouTubeHlsPlaylistParser.kt
+++ b/app/src/main/java/com/github/libretube/util/YouTubeHlsPlaylistParser.kt
@ -0,0 +1,258 @@
+package com.github.libretube.util
+
+import android.net.Uri
+import androidx.annotation.OptIn
+import androidx.media3.common.C
+import androidx.media3.common.Format
+import androidx.media3.common.util.UnstableApi
+import androidx.media3.exoplayer.hls.playlist.HlsMediaPlaylist
+import androidx.media3.exoplayer.hls.playlist.HlsMultivariantPlaylist
+import androidx.media3.exoplayer.hls.playlist.HlsMultivariantPlaylist.Rendition
+import androidx.media3.exoplayer.hls.playlist.HlsPlaylist
+import androidx.media3.exoplayer.hls.playlist.HlsPlaylistParser
+import androidx.media3.exoplayer.hls.playlist.HlsPlaylistParserFactory
+import androidx.media3.exoplayer.upstream.ParsingLoadable
+import java.io.InputStream
+
+/**
+ * A YouTube HLS playlist parser which adds role flags to audio formats with track types.
+ *
+ * YouTube does not provide descriptive audio track types in a standard way and there is no standard
+ * way to tell whether an audio track is a dubbed track.
+ *
+ * However, this information is still provided in the track name, a non-standard property
+ * (`YT-EXT-XTAGS` which has its value encoded as a protocol buffer) and the stream manifest URL.
+ *
+ * This playlist parser adds track types to audio formats which have this information, by parsing
+ * the manifest URL of these formats.
+ *
+ * It relies internally on a default [HlsPlaylistParser] and processes audio tracks when the
+ * [HlsPlaylistParser] instance used parsed the manifest.
+ */
+@OptIn(UnstableApi::class)
+class YoutubeHlsPlaylistParser : ParsingLoadable.Parser<HlsPlaylist> {
+
+    /**
+     * Factory to create [YoutubeHlsPlaylistParser] instances.
+     */
+    class Factory : HlsPlaylistParserFactory {
+        override fun createPlaylistParser() = YoutubeHlsPlaylistParser()
+
+        override fun createPlaylistParser(
+            multivariantPlaylist: HlsMultivariantPlaylist,
+            previousMediaPlaylist: HlsMediaPlaylist?
+        ) = YoutubeHlsPlaylistParser(multivariantPlaylist, previousMediaPlaylist)
+    }
+
+    /**
+     * The [HlsPlaylistParser] instance which is used to delegate parsing of HLS manifests.
+     */
+    private val hlsPlaylistParser: HlsPlaylistParser
+
+    /**
+     * @see [HlsPlaylistParser] no-parameters constructor
+     */
+    private constructor() {
+        this.hlsPlaylistParser = HlsPlaylistParser()
+    }
+
+    /**
+     * @see [HlsPlaylistParser] constructor with [HlsMultivariantPlaylist] and [HlsMediaPlaylist]
+     * parameters
+     */
+    private constructor(
+        multivariantPlaylist: HlsMultivariantPlaylist,
+        previousMediaPlaylist: HlsMediaPlaylist?
+    ) {
+        this.hlsPlaylistParser = HlsPlaylistParser(multivariantPlaylist, previousMediaPlaylist)
+    }
+
+    /**
+     * Parse a YouTube HLS playlist.
+     *
+     * If the given HLS playlist type is not a [HlsMultivariantPlaylist], it is returned as it is.
+     *
+     * If that's the case, audios extracted from the playlist are parsed and the good audio track
+     * type is set to each audio, if applicable and if this information is available.
+     *
+     * @param uri         the source [Uri] of the response, after any redirection.
+     * @param inputStream an [InputStream] from which the response data can be read.
+     *
+     * @return a [HlsPlaylist] which is either the original one parsed by the delegated
+     * [HlsPlaylistParser] instance or a [HlsMultivariantPlaylist] on which audio formats have been
+     * edited to add the role track type flags to the existing ones on them if needed
+     */
+    override fun parse(uri: Uri, inputStream: InputStream): HlsPlaylist {
+        val hlsPlaylist = hlsPlaylistParser.parse(uri, inputStream)
+        if (hlsPlaylist !is HlsMultivariantPlaylist) {
+            return hlsPlaylist
+        }
+
+        val hlsMultivariantPlaylist: HlsMultivariantPlaylist = hlsPlaylist
+
+        return HlsMultivariantPlaylist(
+            hlsMultivariantPlaylist.baseUri,
+            hlsMultivariantPlaylist.tags,
+            hlsMultivariantPlaylist.variants,
+            hlsMultivariantPlaylist.videos,
+            getAudioRenditionsWithTrackTypeSet(hlsMultivariantPlaylist.audios),
+            hlsMultivariantPlaylist.subtitles,
+            hlsMultivariantPlaylist.closedCaptions,
+            // YouTube HLS playlists have only demuxed formats, so it should be not needed to parse
+            // the muxed format, as it would be always null in this case
+            hlsMultivariantPlaylist.muxedAudioFormat,
+            hlsMultivariantPlaylist.muxedCaptionFormats,
+            hlsMultivariantPlaylist.hasIndependentSegments,
+            hlsMultivariantPlaylist.variableDefinitions,
+            hlsMultivariantPlaylist.sessionKeyDrmInitData
+        )
+    }
+
+    /**
+     * Get audio renditions with track types set on them, if they are not already set.
+     *
+     * This function parses audio track types from the stream manifest URL, by parsing the `acont`
+     * value of the `xtags` property of the value of the `sgoap` "path parameter".
+     * It adds then the corresponding ExoPlayer role flag in the audio format, if it has been not
+     * already set (this should never be the case).
+     *
+     * Any failure when the audio track type property could not parsed when it should (audio track
+     * types are only available on videos with multiple audio tracks) is ignored and the stream is
+     * kept as it is in this case.
+     *
+     * @param hlsMultivariantPlaylistAudios the list of audio [Rendition]s of a
+     * [HlsMultivariantPlaylist]
+     * @return a new list of audio [Rendition]s with audio track types set in the role flags of the
+     * audio formats
+     */
+    private fun getAudioRenditionsWithTrackTypeSet(
+        hlsMultivariantPlaylistAudios: List<Rendition>
+    ): List<Rendition> {
+        return hlsMultivariantPlaylistAudios.map {
+            // Add the audio stream as it is if no path segments has been found
+            // This should never happen, as YouTube always uses path segments for their HLS URLs
+            val pathSegments = it.url?.pathSegments ?: return@map it
+
+            // Path segments after the videoplayback one can be also converted to query parameters
+            // (the contrary is also possible), so these segments work like keys and values in a map
+            val sgoapPathParameterNameIndex = pathSegments.indexOf(SGOAP_PATH_PARAMETER)
+
+            // Return the audio stream as it is if no audio track type parameter has been found
+            if (sgoapPathParameterNameIndex == -1) {
+                return@map it
+            }
+
+            val sgoapPathParameterValueIndex = sgoapPathParameterNameIndex + 1
+
+            if (sgoapPathParameterValueIndex == pathSegments.size) {
+                return@map it
+            }
+
+            Rendition(
+                it.url,
+                createAudioFormatFromAcountValue(
+                    pathSegments[sgoapPathParameterValueIndex],
+                    it.format
+                ),
+                it.groupId,
+                it.name
+            )
+        }
+    }
+
+    /**
+     * Create an audio [Format] based on an existing one and the `acont` property value of the
+     * `xtags` one, from a `sgoap` path parameter value.
+     *
+     * If the `acont` property has been found in the `sgoap` path parameter value provided, an
+     * audio track type role flag is added to the existing ones, if it isn't already added, using
+     * [getFullAudioRoleFlags]; otherwise, the format is kept as it is.
+     *
+     * @param sgoapPathParameterValue a `sgoap` path parameter value
+     * @param audioFormat             the audio format linked to the URL from which the
+     *                                `sgoapPathParameterValue` parameter comes from
+     * @return an [Format] based of the original one provided or the original one if the `acont`
+     * property has been not found
+     */
+    private fun createAudioFormatFromAcountValue(
+        sgoapPathParameterValue: String,
+        audioFormat: Format
+    ): Format {
+        XTAGS_ACONT_VALUE_REGEX.find(sgoapPathParameterValue)?.groupValues?.get(1)
+            ?.let { acontValue ->
+                return audioFormat.buildUpon()
+                    .setRoleFlags(
+                        getFullAudioRoleFlags(
+                            audioFormat.roleFlags,
+                            acontValue
+                        )
+                    )
+                    .build()
+            }
+
+        // If no info about format being original, dubbed or descriptive, return the format as it is
+        return audioFormat
+    }
+
+    /**
+     * Get the full audio role flags of an audio track.
+     *
+     * Full role flags are the existing flags parsed by ExoPlayer and the flags coming from the
+     * audio track type parsed from the `acont` property value of the stream manifest URL.
+     *
+     * The following table describes what value is parsed
+     *
+     * | `acont` value  | Role flag added from [ExoPlayer track role flags][C.RoleFlags] |
+     * | ------------- | ------------- |
+     * | `dubbed`  | [C.ROLE_FLAG_DUB]  |
+     * | `descriptive`  | [C.ROLE_FLAG_DESCRIBES_VIDEO]  |
+     * | `original`  | [C.ROLE_FLAG_MAIN]  |
+     * | everything else  | [C.ROLE_FLAG_ALTERNATE]  |
+     *
+     * @param roleFlags the current role flags of the audio track
+     * @param acontValue the value of the `acont` property
+     * @return the full audio role flags of the audio track like described above
+     */
+    private fun getFullAudioRoleFlags(
+        roleFlags: Int,
+        acontValue: String
+    ): Int {
+        val acontRoleFlags = when (acontValue.lowercase()) {
+            "dubbed" -> C.ROLE_FLAG_DUB
+            "descriptive" -> C.ROLE_FLAG_DESCRIBES_VIDEO
+            "original" -> C.ROLE_FLAG_MAIN
+            // Original audio tracks without other audio track should not have the `acont` property
+            // nor the `xtags` one, so the the track should be not set as the main one
+            // The alternate role flag should be the most relevant flag in this case
+            else -> C.ROLE_FLAG_ALTERNATE
+        }
+
+        // Add this flag to the existing ones (if it has been not already added) and return the
+        // result of this operation
+        return roleFlags or acontRoleFlags
+    }
+
+    companion object {
+
+        /**
+         * Constant for the `sgoap` "path parameter" name.
+         *
+         * YouTube HLS streams are for most of them, the same streams delivered as the DASH ones.
+         * The service provide information on the original stream of an HLS stream URL in "path
+         * parameters", `sgovp` for video streams and `sgoap` for audio streams.
+         *
+         * This information should include, for audio streams, the track type when there is multiple
+         * audio tracks in a video, which is what we need to get.
+         */
+        private const val SGOAP_PATH_PARAMETER = "sgoap"
+
+        /**
+         * Regular expression to find the `acont` property value of the `xtags` property value from
+         * a `sgoap` "path parameter" value of a YouTube HLS streaming URL.
+         *
+         * The `acont` property provides the track type of an audio stream, when a video of the
+         * service has multiple audio tracks.
+         */
+        private val XTAGS_ACONT_VALUE_REGEX = Regex("xtags=.*acont=(.[^:]+)")
+    }
+}
--- a/app/src/main/res/values-ar/strings.xml
+++ b/app/src/main/res/values-ar/strings.xml
@ -311,7 +311,6 @@
    <string name="alternative_player_layout">تخطيط المشغل البديل</string>
    <string name="alternative_player_layout_summary">وتظهر أشرطة الفيديو ذات الصلة كصف أعلى من التعليقات بدلا من التعليقات الواردة أدناه.</string>
    <string name="audio_track">مسار صوتي</string>
-    <string name="default_audio_track">الإفتراضي</string>
    <string name="hls_instead_of_dash">استخدام HLS</string>
    <string name="hls_instead_of_dash_summary">استخدم HLS بدلا من DASH (سيكون أبطأ ، غير مستحسن)</string>
    <string name="auto_quality">تلقائي</string>
--- a/app/src/main/res/values-az/strings.xml
+++ b/app/src/main/res/values-az/strings.xml
@ -311,7 +311,6 @@
    <string name="alternative_player_layout">Alternativ oynadıcı tərtibatı</string>
    <string name="alternative_player_layout_summary">Əlaqəli videoları aşağı əvəzinə, şərhlər üzərində cərgə kimi göstər.</string>
    <string name="audio_track">Səs axını</string>
-    <string name="default_audio_track">Standart</string>
    <string name="auto_quality">Avtomatik</string>
    <string name="hls_instead_of_dash">HLS istifadə et</string>
    <string name="hls_instead_of_dash_summary">DASH əvəzinə HLS istifadə et (daha yavaş olacaq, tövsiyə edilmədi)</string>
--- a/app/src/main/res/values-be/strings.xml
+++ b/app/src/main/res/values-be/strings.xml
@ -304,7 +304,6 @@
    <string name="notification_time_summary">Прамежак часу, у які дазволена паказваць апавяшчэнні.</string>
    <string name="alternative_player_layout_summary">Паказваць звязаныя відэа ў радку над каментарыямі, а не ўнізе.</string>
    <string name="audio_track">Гукавая дарожка</string>
-    <string name="default_audio_track">Па змаўчанні</string>
    <string name="hls_instead_of_dash">Выкарыстоўвайце HLS</string>
    <string name="auto_quality">Аўто</string>
    <string name="unsupported_file_format">Фармат файла не падтрымліваецца: %1$s</string>
--- a/app/src/main/res/values-bn/strings.xml
+++ b/app/src/main/res/values-bn/strings.xml
@ -309,7 +309,6 @@
    <string name="layout">লেয়াউট</string>
    <string name="alternative_player_layout">বিকল্প প্লেয়ার লেয়াউট</string>
    <string name="audio_track">অডিও ট্র্যাক</string>
-    <string name="default_audio_track">ডিফল্ট</string>
    <string name="hls_instead_of_dash">HLS ব্যাবহার করুন</string>
    <string name="hls_instead_of_dash_summary">DASH এর বদলে HLS ব্যাবহার করুন (ধীরগতিসম্পন্ন হতে পারে, সুপারিশকৃত নয়)</string>
    <string name="auto_quality">স্বয়ংক্রিয়</string>
--- a/app/src/main/res/values-ckb/strings.xml
+++ b/app/src/main/res/values-ckb/strings.xml
@ -331,7 +331,6 @@
    <string name="notification_time_summary">دیاریکردنی مەودای کاتی ئاگادارکردنەوەکان بۆ پیشاندانی بڵاوکراوە.</string>
    <string name="alternative_player_layout_summary">پیشاندانی ڤیدیۆ هاوشێوەکان لەسەرووی بەشی لێدوانەکان.</string>
    <string name="audio_track">تراکی دەنگی</string>
-    <string name="default_audio_track">بنەڕەتی</string>
    <string name="limit_to_runtime">سنوردارکردن بۆ لێدان</string>
    <string name="trends">پێشنیارکراوەکان</string>
    <string name="featured">هەڵبژێردراوەکان</string>
--- a/app/src/main/res/values-cs/strings.xml
+++ b/app/src/main/res/values-cs/strings.xml
@ -311,7 +311,6 @@
    <string name="layout">Rozložení</string>
    <string name="alternative_player_layout">Alternativní rozložení přehrávače</string>
    <string name="audio_track">Zvuková stopa</string>
-    <string name="default_audio_track">Výchozí</string>
    <string name="auto_quality">Auto</string>
    <string name="hls_instead_of_dash">Použít HLS</string>
    <string name="hls_instead_of_dash_summary">Použít HLS místo DASH (bude pomalejší, nedoporučuje se)</string>
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@ -309,7 +309,6 @@
    <string name="added_to_playlist">Zur Playlist %1$s hinzugefügt</string>
    <string name="sb_markers">Markierungen</string>
    <string name="audio_track">Tonspur</string>
-    <string name="default_audio_track">Standard</string>
    <string name="livestreams">Livestreams</string>
    <string name="alternative_videos_layout">Alternatives Video-Layout</string>
    <string name="hls_instead_of_dash">HLS verwenden</string>
--- a/app/src/main/res/values-el/strings.xml
+++ b/app/src/main/res/values-el/strings.xml
@ -367,7 +367,6 @@
    <string name="import_playlists">Εισαγωγή λιστών αναπαραγωγής</string>
    <string name="export_playlists">Εξαγωγή λιστών αναπαραγωγής</string>
    <string name="audio_track">Ηχητικό κομμάτι</string>
-    <string name="default_audio_track">Προεπιλογή</string>
    <string name="audio_player">Αναπαραγωγή ήχου</string>
    <string name="renamePlaylist">Μετονομασία λίστας αναπαραγωγής</string>
    <string name="queue_insert_related_videos">Εισαγάγετε σχετικά βίντεο</string>
--- a/app/src/main/res/values-es/strings.xml
+++ b/app/src/main/res/values-es/strings.xml
@ -311,7 +311,6 @@
    <string name="navbar_order">Ordenar</string>
    <string name="layout">Diseño</string>
    <string name="audio_track">Pista de audio</string>
-    <string name="default_audio_track">Predeterminada</string>
    <string name="auto_quality">Automatico</string>
    <string name="hls_instead_of_dash_summary">Usar HLS en vez de DASH (podría ser lento, no recomendado)</string>
    <string name="hls_instead_of_dash">Usar HLS</string>
--- a/app/src/main/res/values-eu/strings.xml
+++ b/app/src/main/res/values-eu/strings.xml
@ -319,7 +319,6 @@
    <string name="pinch_control_summary">Erabil atximur egiteko keinua, hurbiltzeko/ urruntzeko.</string>
    <string name="playback_pitch">Tonua</string>
    <string name="audio_track">Audio pista</string>
-    <string name="default_audio_track">Lehenetsia</string>
    <string name="defaults">Lehenetsia</string>
    <string name="alternative_player_layout_summary">Bistaratu erlazionatutako bideoak errenkada gisa iruzkinen gainetik, behean agertu beharrean.</string>
    <string name="hls_instead_of_dash">HLS erabili</string>
--- a/app/src/main/res/values-fa/strings.xml
+++ b/app/src/main/res/values-fa/strings.xml
@ -242,7 +242,6 @@
    <string name="preferences">ترجیحات</string>
    <string name="queue">صف</string>
    <string name="navigation_bar">نوار ناوبری</string>
-    <string name="default_audio_track">پیش‌گزیده</string>
    <string name="hls_instead_of_dash">استفاده از HLS</string>
    <string name="auto_quality">خودکار</string>
    <string name="trending">آن‌چه اکنون داغ است</string>
--- a/app/src/main/res/values-fi/strings.xml
+++ b/app/src/main/res/values-fi/strings.xml
@ -348,7 +348,6 @@
    <string name="notification_time">Ilmoitusaika</string>
    <string name="navbar_order">Järjestys</string>
    <string name="audio_track">Ääniraita</string>
-    <string name="default_audio_track">Oletus</string>
    <string name="hls_instead_of_dash_summary">Käytä HLS:ää DASHin sijaan (on hitaampi, ei suositella)</string>
    <string name="auto_quality">Auto</string>
    <string name="limit_to_runtime">Rajoita suoritusaikaa</string>
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@ -311,7 +311,6 @@
    <string name="layout">Mise en page</string>
    <string name="alternative_player_layout_summary">Afficher les vidéos connexes en une ligne au-dessus des commentaires, à la place d\'au-dessous.</string>
    <string name="audio_track">Piste audio</string>
-    <string name="default_audio_track">Par défaut</string>
    <string name="hls_instead_of_dash">Utiliser HLS</string>
    <string name="hls_instead_of_dash_summary">Utiliser HLS à la place de DASH (sera plus lent, non recommandé)</string>
    <string name="auto_quality">Automatique</string>
--- a/app/src/main/res/values-gu/strings.xml
+++ b/app/src/main/res/values-gu/strings.xml
@ -241,7 +241,6 @@
    <string name="videoCount">%1$d વિડિયો</string>
    <string name="retry">પુન:પ્રયત્ન કરો</string>
    <string name="comments">ટિપ્પણીઓ</string>
-    <string name="default_audio_track">મૂળભૂત</string>
    <string name="downloads">ડાઉનલોડ્સ</string>
    <string name="livestreams">લાઇવસ્ટ્રીમ્સ</string>
    <string name="update_summary">સુધારા માટે ચકાસો</string>
--- a/app/src/main/res/values-hi/strings.xml
+++ b/app/src/main/res/values-hi/strings.xml
@ -198,7 +198,6 @@
    <string name="sb_markers_summary">समय पट्टी पर खंडों को चिह्नित करें।</string>
    <string name="update_available">संस्करण %1$s उपलब्ध है</string>
    <string name="audio_track">ऑडियो ट्रैक</string>
-    <string name="default_audio_track">डिफ़ॉल्ट</string>
    <string name="downloads">डाउनलोडस</string>
    <string name="livestreams">लाइव स्ट्रीम</string>
    <string name="alternative_videos_layout">वैकल्पिक वीडियो लेआउट</string>
--- a/app/src/main/res/values-hu/strings.xml
+++ b/app/src/main/res/values-hu/strings.xml
@ -310,7 +310,6 @@
    <string name="alternative_player_layout">Alternatív lejátszó elrendezés</string>
    <string name="navbar_order">Sorrend</string>
    <string name="alternative_player_layout_summary">A kapcsolódó videók megjelenítése egy sorban a hozzászólások felett, nem pedig alattuk.</string>
-    <string name="default_audio_track">Alapérték</string>
    <string name="audio_track">Hangsáv</string>
    <string name="hls_instead_of_dash">HLS használata</string>
    <string name="auto_quality">Automatikus</string>
--- a/app/src/main/res/values-in/strings.xml
+++ b/app/src/main/res/values-in/strings.xml
@ -311,7 +311,6 @@
    <string name="alternative_player_layout">Tata letak pemutar alternatif</string>
    <string name="alternative_player_layout_summary">Tampilkan video terkait sebagai baris di atas komentar, bukan di bawah.</string>
    <string name="audio_track">Trek audio</string>
-    <string name="default_audio_track">Bawaan</string>
    <string name="hls_instead_of_dash">Gunakan HLS</string>
    <string name="auto_quality">Otomatis</string>
    <string name="hls_instead_of_dash_summary">Gunakan HLS daripada DASH (akan lebih lambat, tidak disarankan)</string>
--- a/app/src/main/res/values-it/strings.xml
+++ b/app/src/main/res/values-it/strings.xml
@ -318,7 +318,6 @@
    <string name="layout">Disposizione</string>
    <string name="alternative_player_layout">Layout alternativo del player</string>
    <string name="audio_track">Traccia audio</string>
-    <string name="default_audio_track">Predefinita</string>
    <string name="hls_instead_of_dash">Usa HLS</string>
    <string name="hls_instead_of_dash_summary">Usa HLS invece di DASH (sarà più lento, non consigliato)</string>
    <string name="auto_quality">Automatica</string>
--- a/app/src/main/res/values-iw/strings.xml
+++ b/app/src/main/res/values-iw/strings.xml
@ -311,7 +311,6 @@
    <string name="layout">פריסה</string>
    <string name="alternative_player_layout">פריסת נגן חלופית</string>
    <string name="audio_track">רצועת שמע</string>
-    <string name="default_audio_track">ברירת מחדל</string>
    <string name="auto_quality">אוטומטי</string>
    <string name="hls_instead_of_dash">להשתמש בתזרים</string>
    <string name="hls_instead_of_dash_summary">להשתמש בתזרים (HLS) במקום ב־DASH (אטי יותר, לא מומלץ)</string>
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@ -340,7 +340,6 @@
    <string name="proceed">続ける</string>
    <string name="play_latest_videos">最新の動画を再生</string>
    <string name="audio_track">音声トラック</string>
-    <string name="default_audio_track">標準</string>
    <string name="hls_instead_of_dash_summary">DASHの代わりにHLSを使用します (より低速、非推奨)</string>
    <string name="hls_instead_of_dash">HLSを使う</string>
    <string name="auto_quality">自動</string>
--- a/app/src/main/res/values-ko/strings.xml
+++ b/app/src/main/res/values-ko/strings.xml
@ -240,7 +240,6 @@
    <string name="import_playlists">재생목록 가져오기</string>
    <string name="export_playlists">재생목록 내보내기</string>
    <string name="audio_track">오디오 트랙</string>
-    <string name="default_audio_track">기본값</string>
    <string name="hls_instead_of_dash">HLS를 사용하세요</string>
    <string name="limit_to_runtime">런타임으로 제한</string>
    <string name="trends">트렌드</string>
--- a/app/src/main/res/values-lt/strings.xml
+++ b/app/src/main/res/values-lt/strings.xml
@ -311,7 +311,6 @@
    <string name="alternative_player_layout_summary">Rodyti susijusius vaizdo įrašus kaip eilutę virš komentarų, o ne kaip įprasta po jais.</string>
    <string name="alternative_player_layout">Alternatyvus grotuvo išdėstymas</string>
    <string name="audio_track">Garso takelis</string>
-    <string name="default_audio_track">Numatytas</string>
    <string name="auto_quality">Automatinė</string>
    <string name="hls_instead_of_dash">Naudoti HLS</string>
    <string name="hls_instead_of_dash_summary">Vietoj DASH naudoti HLS (veiks lėčiau, nerekomenduojama)</string>
--- a/app/src/main/res/values-lv/strings.xml
+++ b/app/src/main/res/values-lv/strings.xml
@ -339,7 +339,6 @@
    <string name="layout">Izklājums</string>
    <string name="alternative_player_layout">Alternatīvs atskaņotāja izklājums</string>
    <string name="alternative_player_layout_summary">Rādīt saistītos video rindā virs komentāriem nevis zem tiem.</string>
-    <string name="default_audio_track">Noklusējumaa</string>
    <string name="unsupported_file_format">Neatbalstīts faila formāts: %1$s</string>
    <string name="hls_instead_of_dash">Izmantot HLS</string>
    <string name="auto_quality">Automātiski</string>
--- a/app/src/main/res/values-mr/strings.xml
+++ b/app/src/main/res/values-mr/strings.xml
@ -336,7 +336,6 @@
    <string name="layout">मांडणी</string>
    <string name="alternative_player_layout">पर्यायी प्लेअर लेआउट</string>
    <string name="audio_track">ऑडिओ ट्रॅक</string>
-    <string name="default_audio_track">डीफॉल्ट</string>
    <string name="limit_to_runtime">रनटाइमची मर्यादा</string>
    <string name="queue_insert_related_videos">संबंधित व्हिडिओ समाविष्ट करा</string>
    <string name="brightness">ब्राईटनेस</string>
--- a/app/src/main/res/values-nb-rNO/strings.xml
+++ b/app/src/main/res/values-nb-rNO/strings.xml
@ -308,7 +308,6 @@
    <string name="notification_time_summary">Tidsperiode merknadene kan vises.</string>
    <string name="navbar_order">Rekkefølge</string>
    <string name="alternative_player_layout_summary">Vis relaterte videoer som rad over kommentarene istedenfor under.</string>
-    <string name="default_audio_track">Forvalg</string>
    <string name="audio_track">Lydspor</string>
    <string name="hls_instead_of_dash">Bruk HLS</string>
    <string name="hls_instead_of_dash_summary">Bruk HLS istedenfor DASH (tregere og ikke anbefalt)</string>
--- a/app/src/main/res/values-or/strings.xml
+++ b/app/src/main/res/values-or/strings.xml
@ -311,7 +311,6 @@
    <string name="alternative_player_layout">ବିକଳ୍ପ ପ୍ଲେୟାର୍ ଲେଆଉଟ୍</string>
    <string name="alternative_player_layout_summary">ନିମ୍ନୋକ୍ତ ମନ୍ତବ୍ୟଗୁଡିକ ଉପରେ ସଂପୃକ୍ତ ଭିଡିଓଗୁଡିକ ଧାଡି ଭାବରେ ଦେଖାନ୍ତୁ ।</string>
    <string name="audio_track">ଅଡିଓ ଟ୍ରାକ୍</string>
-    <string name="default_audio_track">ଡିଫଲ୍ଟ</string>
    <string name="hls_instead_of_dash">HLS ବ୍ୟବହାର କରନ୍ତୁ</string>
    <string name="hls_instead_of_dash_summary">DASH ପରିବର୍ତ୍ତେ HLS ବ୍ୟବହାର କରନ୍ତୁ (ଧୀର ହେବ, ସୁପାରିଶ ହେବ ନାହିଁ)</string>
    <string name="auto_quality">ସ୍ଵତଃ</string>
--- a/app/src/main/res/values-pa/strings.xml
+++ b/app/src/main/res/values-pa/strings.xml
@ -336,7 +336,6 @@
    <string name="layout">ਲੇਆਊਟ</string>
    <string name="notification_time_summary">ਸਮਾਂ ਸੀਮਤ ਕਰੋ ਜਿਸ ਵਿੱਚ ਸਟ੍ਰੀਮ ਸੂਚਨਾਵਾਂ ਦਿਖਾਈਆਂ ਜਾਂਦੀਆਂ ਹਨ।</string>
    <string name="navbar_order">ਆਰਡਰ</string>
-    <string name="default_audio_track">ਡੀਫ਼ਾਲਟ</string>
    <string name="alternative_player_layout">ਵਿਕਲਪਿਕ ਪਲੇਅਰ ਲੇਆਊਟ</string>
    <string name="trending">ਹੁਣ ਕੀ ਰੁਝਾਨ ਹੈ</string>
    <string name="hls_instead_of_dash">HLS ਦੀ ਵਰਤੋਂ ਕਰੋ</string>
--- a/app/src/main/res/values-pl/strings.xml
+++ b/app/src/main/res/values-pl/strings.xml
@ -311,7 +311,6 @@
    <string name="alternative_player_layout_summary">Pokaż powiązane filmiki w wierszu nad komentarzami.</string>
    <string name="alternative_player_layout">Inny układ powiązanych filmów</string>
    <string name="audio_track">Ścieżka dźwiękowa</string>
-    <string name="default_audio_track">Domyślna</string>
    <string name="hls_instead_of_dash">HTTP Live Streaming</string>
    <string name="hls_instead_of_dash_summary">Użyj HLS zamiast DASH (będzie wolniej, nie zalecane)</string>
    <string name="auto_quality">Automatyczna</string>
--- a/app/src/main/res/values-pt-rBR/strings.xml
+++ b/app/src/main/res/values-pt-rBR/strings.xml
@ -311,7 +311,6 @@
    <string name="alternative_player_layout">Esquema alternativo do reprodutor</string>
    <string name="alternative_player_layout_summary">Exibir os vídeos relacionados como uma linha acima dos comentários em vez de abaixo.</string>
    <string name="audio_track">Faixa de áudio</string>
-    <string name="default_audio_track">Padrão</string>
    <string name="hls_instead_of_dash">Usar HLS</string>
    <string name="hls_instead_of_dash_summary">Usar HLS em vez de DASH (será mais lento, não recomendado)</string>
    <string name="auto_quality">Automático</string>
--- a/app/src/main/res/values-pt/strings.xml
+++ b/app/src/main/res/values-pt/strings.xml
@ -312,7 +312,6 @@
    <string name="alternative_player_layout">Esquema alternativo de reprodução</string>
    <string name="alternative_player_layout_summary">Mostrar os vídeos relacionados como uma linha acima dos comentários em vez de abaixo.</string>
    <string name="audio_track">Faixa de áudio</string>
-    <string name="default_audio_track">Padrão</string>
    <string name="hls_instead_of_dash">Usar HLS</string>
    <string name="hls_instead_of_dash_summary">Usar HLS em vez de DASH (será mais lento, não recomendado)</string>
    <string name="auto_quality">Automático</string>
--- a/app/src/main/res/values-ro/strings.xml
+++ b/app/src/main/res/values-ro/strings.xml
@ -339,7 +339,6 @@
    <string name="start_time">Timpul de începere</string>
    <string name="end_time">Timpul de sfârșit</string>
    <string name="notification_time">Restricționați timpul de notificare</string>
-    <string name="default_audio_track">Implicit</string>
    <string name="unsupported_file_format">Format de fișier nesuportat: %1$s</string>
    <string name="hls_instead_of_dash">Utilizați HLS</string>
    <string name="hls_instead_of_dash_summary">Utilizați HLS în loc de DASH (va fi mai lent, nu este recomandat)</string>
--- a/app/src/main/res/values-ru/strings.xml
+++ b/app/src/main/res/values-ru/strings.xml
@ -311,7 +311,6 @@
    <string name="layout">Макет</string>
    <string name="alternative_player_layout">Альтернативный макет плеера</string>
    <string name="audio_track">Аудио трек</string>
-    <string name="default_audio_track">По умолчанию</string>
    <string name="hls_instead_of_dash">Использовать HLS</string>
    <string name="hls_instead_of_dash_summary">Использовать HLS вместо DASH (будет медленнее, не рекомендуется)</string>
    <string name="auto_quality">Авто</string>
--- a/app/src/main/res/values-si/strings.xml
+++ b/app/src/main/res/values-si/strings.xml
@ -223,7 +223,6 @@
    <string name="navbar_order">පිළිවෙල</string>
    <string name="layout">පිරිසැලසුම</string>
    <string name="audio_track">ශ්‍රව්‍ය පථය</string>
-    <string name="default_audio_track">පෙරනිමිය</string>
    <string name="hls_instead_of_dash">HLS භාවිතා කරන්න</string>
    <string name="auto_quality">ස්වයං</string>
    <string name="limit_to_runtime">ධාවන කාලයට සීමා කරන්න</string>
--- a/app/src/main/res/values-sr/strings.xml
+++ b/app/src/main/res/values-sr/strings.xml
@ -308,7 +308,6 @@
    <string name="sb_markers">Маркери</string>
    <string name="sb_markers_summary">Означите сегменте на временској траци.</string>
    <string name="audio_track">Аудио запис</string>
-    <string name="default_audio_track">Подразумевано</string>
    <string name="livestreams">Стримови уживо</string>
    <string name="alternative_videos_layout">Алтернативни изглед видео записа</string>
    <string name="defaultIconLight">Подразумевано светло</string>
--- a/app/src/main/res/values-tr/strings.xml
+++ b/app/src/main/res/values-tr/strings.xml
@ -311,7 +311,6 @@
    <string name="alternative_player_layout_summary">İlgili videoları, yorumların altında değil, üstünde bir satır olarak göster.</string>
    <string name="navbar_order">Sıra</string>
    <string name="audio_track">Müzik parçası</string>
-    <string name="default_audio_track">Varsayılan</string>
    <string name="auto_quality">Otomatik</string>
    <string name="hls_instead_of_dash">HLS\'yi kullan</string>
    <string name="hls_instead_of_dash_summary">DASH yerine HLS kullan (daha yavaş olacaktır, önerilmez)</string>
--- a/app/src/main/res/values-uk/strings.xml
+++ b/app/src/main/res/values-uk/strings.xml
@ -311,7 +311,6 @@
    <string name="layout">Вигляд</string>
    <string name="alternative_player_layout">Альтернативний вигляд програвача</string>
    <string name="audio_track">Звукова доріжка</string>
-    <string name="default_audio_track">Типово</string>
    <string name="hls_instead_of_dash">Використовувати HLS</string>
    <string name="hls_instead_of_dash_summary">Використовувати HLS замість DASH (працюватиме повільніше, не рекомендується)</string>
    <string name="auto_quality">Авто</string>
--- a/app/src/main/res/values-vi/strings.xml
+++ b/app/src/main/res/values-vi/strings.xml
@ -310,7 +310,6 @@
    <string name="sb_markers_summary">Đánh dấu các phân đoạn trên thanh thời lượng.</string>
    <string name="sb_markers">Đánh dấu</string>
    <string name="audio_track">Track âm thanh</string>
-    <string name="default_audio_track">Mặc định</string>
    <string name="livestreams">Trực tiếp</string>
    <string name="alternative_videos_layout">Bố cục thay thế cho videos</string>
    <string name="defaultIconLight">Light mặc định</string>
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@ -311,7 +311,6 @@
    <string name="alternative_player_layout">备选的播放器布局</string>
    <string name="alternative_player_layout_summary">将相关视频显示为评论上方而不是下方的一行。</string>
    <string name="audio_track">音轨</string>
-    <string name="default_audio_track">默认</string>
    <string name="hls_instead_of_dash">使用 HLS</string>
    <string name="hls_instead_of_dash_summary">使用 HLS 而不是 DASH（会更慢，不推荐）</string>
    <string name="auto_quality">自动</string>
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@ -327,7 +327,6 @@
    <string name="pinch_control">調整音高</string>
    <string name="play_latest_videos">播放最新影片</string>
    <string name="audio_track">音訊曲目</string>
-    <string name="default_audio_track">預設</string>
    <string name="export_subscriptions">匯出訂閱列表</string>
    <string name="skip_buttons">跳過按鈕</string>
    <string name="no_search_result">無結果。</string>
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@ -330,7 +330,6 @@
    <string name="alternative_player_layout">Alternative player layout</string>
    <string name="alternative_player_layout_summary">Show the related videos as a row above the comments instead of below.</string>
    <string name="audio_track">Audio track</string>
-    <string name="default_audio_track">Default</string>
    <string name="unsupported_file_format">Unsupported file format: %1$s</string>
    <string name="hls_instead_of_dash">Use HLS</string>
    <string name="hls_instead_of_dash_summary">Use HLS instead of DASH (will be slower, not recommended)</string>
@ -445,6 +444,15 @@
    <string name="import_format_youtube_csv">YouTube (CSV)</string>
    <string name="home_tab_content">Home tab content</string>
    <string name="show_search_suggestions">Show search suggestions</string>
+    <string name="audio_track_format">%1$s - %2$s</string>
+    <string name="unknown_audio_language">Unknown audio language</string>
+    <string name="unknown_audio_track_type">Unknown audio track type</string>
+    <string name="original_or_main_audio_track">original or main</string>
+    <string name="dubbed_audio_track">dubbed</string>
+    <string name="descriptive_audio_track">descriptive</string>
+    <string name="default_or_unknown_audio_track">default or unknown</string>
+    <string name="unknown_or_no_audio">unknown or no audio</string>
+
    <!-- Notification channel strings -->
    <string name="download_channel_name">Download Service</string>
    <string name="download_channel_description">Shows a notification when downloading media.</string>