Bug 224096 - Sped-up videos in Safari Technology Preview Release 123 are pitch shifted
Summary: Sped-up videos in Safari Technology Preview Release 123 are pitch shifted
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Media (show other bugs)
Version: Safari Technology Preview
Hardware: Mac (Intel) macOS 11
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2021-04-02 00:37 PDT by Saagar Jha
Modified: 2021-04-02 08:58 PDT (History)
3 users (show)

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Description Saagar Jha 2021-04-02 00:37:41 PDT 
Obligatory: this is not an April Fools joke.

On Safari Technology Preview Release 123 (I checked Release 122–it works fine there), running on macOS Big Sur 11.3 Beta (20E5224a), when I adjust the playback rate of <video> elements the audio becomes pitch shifted, so people in sped-up video sound like they're characters from Alvin and the Chipmunks (and when slowed down their voices are comically deep). I can reproduce this on pretty much every video element other than YouTube for some reason. Here's a sample website that reproduces this easily: https://developer.apple.com/videos/play/wwdc2020/10663/
Comment 1 Radar WebKit Bug Importer 2021-04-02 08:58:28 PDT 
<rdar://problem/76150150>