[Webkit-unassigned] [Bug 252480] New: [GStreamer][MSE] Reinstall matroskademuxForceSegmentStartToEqualZero probe on relinking
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Fri Feb 17 05:56:05 PST 2023
https://bugs.webkit.org/show_bug.cgi?id=252480
Bug ID: 252480
Summary: [GStreamer][MSE] Reinstall
matroskademuxForceSegmentStartToEqualZero probe on
relinking
Product: WebKit
Version: WebKit Nightly Build
Hardware: Unspecified
OS: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: Media
Assignee: webkit-unassigned at lists.webkit.org
Reporter: eocanha at igalia.com
When a matroskademux src pad is relinked (because the old one was removed), the
probe that corrects the segment start is lost with the disappearing pad and
never reinstalled on the replacing one. This can cause issues, for instance,
while doing trick playback in reverse on Broadcom devices, which don't need
parsers.
During trickplay, pads between demux and appsink elements are relinked.
GstBuffers related to trick playback are rejected/clipped by appsink (more
precisely, by its base class: GstBaseSink), because GstSegment start position
value don't match to those GstBuffers.
See: https://github.com/WebPlatformForEmbedded/WPEWebKit/pull/1033
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