[MSE] SourceBufferWebMParser should ignore segment length

• Component: Media
• Status: NEW ---

[Jean-Yves Avenard [:jya]]

STR:

- Load https://jyavenard.github.io/htmltests/tests/mse_webm/big.html
- this pages loads 5MB of webm at a time, until an exception occurs due to the source buffer throwing a QuotaExceededError

Results:
10801: SourceBuffer buffered ranges grew from TimeRanges: [0.007, 545.109) to TimeRanges: [0.007, 550.11)
10801: Loading buffer: [0, 888286)
10999: got error event
10999: ok(false) should not fire 'error' event
10999: SimpleTest.finish

Expected:
QuotaExceededError should be caught and it should display the maximum size of a source buffer.

When this happens, the video element throws a fatal error.

SourceBuffer QuotaExceededError shouldn't be a fatal error.

[Radar WebKit Bug Importer]

<rdar://problem/83271244>

[Jean-Yves Avenard [:jya]]

This issue occurs because the page keeps loading the content in a loop. The initial WebM Segment contains a set length.

libwebm errors when it sees content further than the initial segment length.

We should ignore that length as both Firefox and Chrome are doing.

[Ahmad Saleem]

@jya - Seems to load fine in STP178, is it fixed?