104 - Browser and SFU simulcast status
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chrome 75 (canary)chrome stableSafari TPSafarifirefox
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Media Simulcast / ABRh264 simulcastyes - but bug pendingonly via SDP munglingyesyesno
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vp8 simulcastyesonly via SDP munglingyesyesyes
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W3C Browsers APIsRTCTransceiverHave transceiversyes - with unified planyes - unified planyesyesyes
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Stats APICompliant Statsyes - but bug pendingnononono
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Per layer Statsno nononono
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Simulcast enabling
Standard API + createOffer()
yesnononoyes - but old setParameter()
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legacy SDP manglingyesyesyesyesno
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IETF Internet protocolsSignalling (JSEP, SDP O/A)Standard Unified Planyesyesyesopt-inyes
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Legacy Plan Bopt-inopt-inopt-inyesno
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Media Transport (RTP) simulcast featuresridyes - if using addTransceivernononoyes
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repairedId (RTX)yesnononono (no RTX at all)
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legacy ssrc in SDPno - if using addTransceiveryesyesyesyes
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Bandwidth evaluation and congestion controltransport-wide-ccyesyesyesyesno
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REMByesyesyesyesyes
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not all standards, but some IETF doc existsvetted by henrik and haraldvetted by Youennvetted by nils
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