Bug 262193 - [GStreamer][MSE] Push STREAM_COLLECTION event after flushing
Summary: [GStreamer][MSE] Push STREAM_COLLECTION event after flushing
Status: RESOLVED FIXED
Alias: None
Product: WebKit
Classification: Unclassified
Component: Media (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Enrique Ocaña
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2023-09-27 09:10 PDT by Enrique Ocaña
Modified: 2023-09-28 06:55 PDT (History)
1 user (show)

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Description Enrique Ocaña 2023-09-27 09:10:41 PDT 
Flushing the playback pipeline when very first buffers are being pushed downstream causes STREAM_COLLECTION event to be dropped before reaching decodebin3. As a result playback never starts after flush (buffer push return not-linked). This happens on initial seek sometimes, when it is triggered at the same time that first buffers push.

STREAM_COLLECTION is dropped by GstBaseParse element specificaly that is caching events and sending them with first frame. Unfortunately flushing will drop all pending events if first frame is not ready yet.

See: https://github.com/WebPlatformForEmbedded/WPEWebKit/pull/1197
Comment 1 Enrique Ocaña 2023-09-27 09:20:17 PDT 
Pull request: https://github.com/WebKit/WebKit/pull/18285
Comment 2 EWS 2023-09-28 06:54:51 PDT 
Committed 268582@main (4c9c58364145): <https://commits.webkit.org/268582@main>

Reviewed commits have been landed. Closing PR #18285 and removing active labels.
Comment 3 Radar WebKit Bug Importer 2023-09-28 06:55:15 PDT 
<rdar://problem/116181141>