Low latency supported streaming protocols and encryption types

This reference article lists the low latency streaming protocols and encryption types.


The following container formats and encryption schemes are supported.

Packaging format Container format Condition Encryption scheme Format string
HLS v3 MPG2-TS Requires playlist proxy for HLS when token auth is used AES (format=m3u8-aapl-v3,encryption=cbc)
HLS v4 MPG2-TS Requires playlist proxy for HLS when token auth is used AES (format=m3u8-aapl-v4,encryption=cbc)
Non LL-HLS scenario CBCS (FairPlay) (format=m3u8-aapl-v4,encryption=cbcs-aapl)
HLS v7 and above CMAF Requires playlist proxy for HLS AES (format=m3u8-cmaf,encryption=cbc)
Does not work with LL-HLS output CBCS (FairPlay) (format=m3u8-cmaf,encryption=cbcs-aapl)
Dash CMAF AES (format=mpd-time-cmaf,encryption=cbc)
CENC (PlayReady or Widevine) (format=mpd-time-cmaf,encryption=cenc)

HLS/CMAF + FairPlay (including HEVC/H.265) should enable both Dash and HLS protocols, and is supported on the following devices:

  • iOS 11 or later.
  • iPhone 8 or later.
  • macOS High Sierra with Intel 7th Generation CPU.


Widevine is not available in the GovCloud region.

Smooth Streaming

The Smooth Streaming protocol supports the following container formats and encryption schemes.

Protocol Container format Encryption scheme
fMP4 AES https://amsv3account-usw22.streaming.media.azure.net/00000000-0000-0000-0000-000000000000/ignite.ism/manifest(encryption=cbc)
fMP4 CENC (PlayReady) https://amsv3account-usw22.streaming.media.azure.net/00000000-0000-0000-0000-000000000000/ignite.ism/manifest(encryption=cenc)
fMP4 PIFF 1.1 (PlayReady) https://amsv3account-usw22.streaming.media.azure.net/00000000-0000-0000-0000-000000000000/ignite.ism/manifest(encryption=piff)


PIFF 1.1 support is provided as a backwards compatible solution for Smart TV (Samsung, LG) that implemented the early "Silverlight" version of Common Encryption. You should use the PIFF format only where needed for support of legacy Samsung or LG Smart TVs shipped between 2009-2015 that supported the PIFF 1.1 version of PlayReady encryption.

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