Bug 260798

Summary:

mediaTime reported using requestVideoFrameCallback is not accurate on iOS

Product:

WebKit

Reporter:

Kevin Dorion <kevin.dorion>

Component:

Media

Assignee:

Nobody <webkit-unassigned>

Status:

NEW

Severity:

Normal

CC:

eric.carlson, jer.noble, kevin.dorion, tomac, webkit-bug-importer, youennf

Priority:

Keywords:

InRadar

Version:

Safari 16

Hardware:

iPhone / iPad

OS:

iOS 16

Attachments:

Description	Flags
Side-by-side comparison of the mediaTime precision (MacOS Chrome vs iOS Safari)	none

Kevin Dorion

Reported 2023-08-28 08:37:26 PDT

Created attachment 467458 [details] Side-by-side comparison of the mediaTime precision (MacOS Chrome vs iOS Safari) On iOS devices, the mediaTime reported when listening to requestVideoFrameCallback is not accurate (floating point issue). On desktops and other devices, the mediaTime is exactly accurate with what is reported by ffmpeg. Please see the attachment for a side-by-side comparison of the same frame on Chrome Version 116.0.5845.110 and iPhone 16.2 Reproducible on https://web.dev/requestvideoframecallback-rvfc/

Attachments
Side-by-side comparison of the mediaTime precision (MacOS Chrome vs iOS Safari) (744.74 KB, image/png) 2023-08-28 08:37 PDT, Kevin Dorion	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Radar WebKit Bug Importer

Comment 1 2023-08-28 09:29:17 PDT

<rdar://problem/114568575>

Note You need to log in before you can comment on or make changes to this bug.