2.2.3 Fragment Request
The FragmentRequest field and related fields contain data that is required to request a fragment from the server.
FragmentRequest (variable): The URI [RFC2616] of the fragment resource.
BitratePredicate (variable): The bit rate of the requested fragment.
CustomAttributesPredicate (variable): An attribute of the requested fragment that is used to disambiguate tracks.
CustomAttributesKey (variable): The name of the attribute that is specified in the CustomAttributesPredicate field.
CustomAttributesValue (variable): The value of the attribute that is specified in the CustomAttributesPredicate field.
FragmentsNoun (variable): The type of response that is expected by the client.
StreamName (variable): The name of the stream that contains the requested fragment.
Time (variable): The time of the requested fragment.
HLSPredicate (variable): An optional variable to request a fragment that is delivered with the HTTP Live Streaming protocol as specified in [IETFDRAFT-HLS] section 6.2.2.
The syntax of the fields that are defined in this section, specified in ABNF [RFC5234], is as follows.
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FragmentRequest = PresentationURI "/" QualityLevelsSegment "/" FragmentsSegment ; PresentationURI is specified in section 2.2.1 QualityLevelsSegment = QualityLevelsNoun "(" QualityLevelsPredicate ")" QualityLevelsNoun = "QualityLevels" QualityLevelsPredicate = BitratePredicate *( "," CustomAttributesPredicate ) BitratePredicate = STRING-UINT32 CustomAttributesPredicate = CustomAttributesKey "=" CustomAttributesValue CustomAttributesKey = URISAFE-IDENTIFIER-NONNUMERIC CustomAttributesValue = URISAFE-IDENTIFIER FragmentsSegment = FragmentsNoun "(" FragmentsPredicate ")" FragmentsNoun = FragmentsNounFullResponse / FragmentsNounMetadataOnly / FragmentsNounDataOnly / FragmentsNounIndependentOnly FragmentsNounFullResponse = "Fragments" FragmentsNounMetadataOnly = "FragmentInfo" FragmentsNounDataOnly = "RawFragments" FragmentsNounIndependentOnly = "KeyFrames" FragmentsPredicate = StreamName "=" Time [ HLSPredicate ] StreamName = URISAFE-IDENTIFIER-NONNUMERIC Time = STRING-UINT64 HLSPredicate = ", " "format=m3u8-aapl"