Opus in WebM does work on iOS 17.4. Tested on <a href="https://hpr.dogphilosophy.net/t

Had success opening Opus in MP4 in Safari on iOS 17. Opus in WebM doesn

Apple officially declared support for Opus in WebM and MP4 in <a href="https://develop

<a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/us

Opus: Need data for MP4 and WebM containers about caniuse HOT 5 OPEN

Artoria2e5 commented on July 21, 2024 1

Opus: Need data for MP4 and WebM containers

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Comments (5)

nihil-admirari commented on July 21, 2024 1

Opus in WebM does work on iOS 17.4. Tested on https://hpr.dogphilosophy.net/test/.

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nihil-admirari commented on July 21, 2024

Had success opening Opus in MP4 in Safari on iOS 17.
Opus in WebM doesn't work on iOS..
Support depends on Lockdown Mode being disabled. If Lockdown mode is enabled, even Opus in CAF stops working.

Test files are provided by chromium:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Opus Test</title>
  <style>
    body {
        display: flex;
        flex-direction: column;
    }
  </style>
</head>
<body>
  Opus in WebM:
  <audio controls
         src="https://raw.githubusercontent.com/chromium/chromium/main/media/test/data/bear-opus.webm">
  </audio>
  Opus in MP4:
  <audio controls
         src="https://raw.githubusercontent.com/chromium/chromium/main/media/test/data/bear-opus.m4a">
  </audio>
</body>
</html>

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nihil-admirari commented on July 21, 2024

Apple officially declared support for Opus in WebM and MP4 in Safari 17 Release Notes:

Added support for stereo-only Opus in MPEG-4 and WebM containers on macOS Sonoma. (50994465)

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Artoria2e5 commented on July 21, 2024

I wonder if they allow VBR in those containers too -- Opus/CAF support was originally limited to CBR. I should really get a Sonoma machine to test with...

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wbob commented on July 21, 2024

@Artoria2e5 as the audio/webm opus file on the sample page used by @nihil-admirari is a not a Hard-CBR file I'd think so. The sample file to test variable frame size (not to be confused with bitrate) at WebKit/WebKit@b41ec21 too is a VBR file

Edit: I did test VBR playback successfully on iOS 17.5 and confirmed that the audio-blob regression in 17.4 is gone too

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