Bug 249004

Summary:

Audio bitrate drops after 5 minutes

Product:

WebKit

Reporter:

Teodor <teodor.atroshenko>

Component:

WebRTC

Assignee:

Nobody <webkit-unassigned>

Status:

NEW

Severity:

Normal

CC:

webkit-bug-importer, youennf

Priority:

Keywords:

InRadar

Version:

Safari 16

Hardware:

Mac (Apple Silicon)

OS:

macOS 13

Attachments:

Description	Flags
Audio bitrate graph	none
Audio packet count graph	none

Teodor

Reported 2022-12-08 19:23:09 PST

Created attachment 463949 [details] Audio bitrate graph During multi-party WebRTC call (SFU), the issue was encountered when using RODECaster Pro Stereo microphone, opus/48000/2 codec, with minptime=10;useinbandfec=1 parameters. After around 5 minutes since the peer connection is established, the audio bitrate drops significantly and static noise is introduced. Packet count is consistent with no other issues (e.g., no video quality or data channel issues). Attached are screenshots of audio bitrate and packet count graphs, with bitrate drop happening around the time when the person resumes speaking after a pause in speech. This issue is consistently reproducible in Safari, yet does not happen in Chrome on the same device.

Attachments
Audio bitrate graph (45.76 KB, image/png) 2022-12-08 19:23 PST, Teodor	no flags	Details
Audio packet count graph (28.02 KB, image/png) 2022-12-08 19:23 PST, Teodor	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Teodor

Comment 1 2022-12-08 19:23:38 PST

Created attachment 463950 [details] Audio packet count graph

Radar WebKit Bug Importer

Comment 2 2022-12-15 19:24:18 PST

<rdar://problem/103429762>

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