Bug 199436

Summary: REGRESSION: iPadOS 13 beta 3: Some Youtube Live streams do not work
Product: WebKit Reporter: Mattias <mattias.bergstrom>
Component: MediaAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: eric.carlson, jer.noble, mattias.bergstrom, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: Other   
Hardware: iPhone / iPad   
OS: Other   
Attachments:
Description Flags
Develop console log with MSE logging enabled none

Description Mattias 2019-07-03 04:32:58 PDT 
Created attachment 373386 [details]
Develop console log with MSE logging enabled

Live streams that have been going for some time (more than 1-2 hours) do not work on iPadOS 13 beta 3. They get stuck with a spinner, and never start. Newly started live streams seem to work fine, though.

Repro steps
- Open safari on iPadOS 13 beta 3
- Open any of the following urls:
    https://www.youtube.com/watch?v=lrX6ktLg8WQ
    https://www.youtube.com/watch?v=21X5lGlDOfg
    https://www.youtube.com/watch?v=d3_gK9MrXo8
- Observe that the video does not start

I attached a log from the safari developer console with MSE logging enabled. From what I can see it seems to be appending segments as expected, but this log line caught my attention:

[Log] MediaPlayerPrivateMediaSourceAVFObjC::seekCompleted(6792942B) waiting for video frame

Might be unrelated, but it seems like it gets stuck after seeking.
Comment 1 Radar WebKit Bug Importer 2019-07-03 10:20:14 PDT 
<rdar://problem/52595920>