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Re: [Hls-interest] AV sync issues with AES 128 encrypted non-multiplexed HLS streams in macOS 10.15.4

Roger Pantos <rpantos@apple.com> Wed, 20 May 2020 15:51 UTC

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From: Roger Pantos <rpantos@apple.com>
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Date: Wed, 20 May 2020 08:51:45 -0700
In-reply-to: <34B34DAC-BA92-43F2-B6F1-8867F1CCEFC8@unified-streaming.com>
Cc: hls-interest@ietf.org
To: Boy van Dijk <boy@unified-streaming.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/hls-interest/ZyRuRgkWj43HC5rANmSWRClXv8c>
Subject: Re: [Hls-interest] AV sync issues with AES 128 encrypted non-multiplexed HLS streams in macOS 10.15.4
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> On May 20, 2020, at 7:41 AM, Boy van Dijk <boy@unified-streaming.com> wrote:
> 
> Hi,
> 
> Some of our customer have notified us about AV sync issues when streaming AES 128 encrypted HLS streams in macOS 10.15.4 / Safari 13.1.
> 
> After some investigation, it is clear that these issues only happen with non-multiplexed content. 
> 
> The issues become worse the longer you play the stream. After about 10 minutes it's very easily noticeable.
> 
> As we have seen this issue with content packaged with different products, and because it's only reproducible in the latest public release of macOS, it seems this is a bug on Apple's side.
> 
> This is a demo stream that exhibits the issue, generated by just-in-time packager Unified Origin (the sync issues can be noticed from about 5 minutes into the content): 
> 
> https://demo.unified-streaming.com/video/tears-of-steel/tears-of-steel-aes.ism/.m3u8?hls_no_multiplex
> 
> In case I need to report this bug elsewhere, or if additional info is needed, please let me know.

For issues that are specific to Apple clients please file a bug and include a sysdiagnose here: http://feedbackassistant.apple.com <http://feedbackassistant.apple.com/>


Roger Pantos
Apple Inc.

> 
> Thanks.
> 
> Boy (Unified Streaming)
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