[Webkit-unassigned] [Bug 227882] New: [GStreamer] Vimeo video playback is jerky after seek

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=227882

            Bug ID: 227882
           Summary: [GStreamer] Vimeo video playback is jerky after seek
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at gnome.org

Created attachment 433344

  --> https://bugs.webkit.org/attachment.cgi?id=433344&action=review

Screencast

* Choose some video from https://vimeo.com/watch
 * Start playing the video in Ephy Tech Preview and note it is working fine
 * Seek the video. The first seek does not work and causes video playback to restart from the beginning. Loads of GStreamer warnings print on the terminal.
 * Seek the video again. The video playback gets all messed up.

Screencast and GStreamer log attached. The warnings from the initial seek look like this:

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.088: ../gst/gstpad.c:4549:gst_pad_push_data:<fdkaacdec0:src> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<audio_0:proxypad18> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<decodebin3-0:audio_0> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<audio_0:proxypad19> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<uridecodebin3-0:audio_0> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<audio-concat:sink_0> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<audio-concat:src> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<playsink:audio_sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<audio_sink:proxypad7> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<audiotee:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<audiotee:src_0> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<streamsynchronizer0:sink_1> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<streamsynchronizer0:src_1> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<abin:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<sink:proxypad27> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<filter-convert:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<filter-convert:src> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<scaletempo0:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<scaletempo0:src> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<aqueue:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<aqueue:src> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<aconv:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<sink:proxypad25> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<conv:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<conv:src> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<resample:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<resample:src> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<src:proxypad26> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<aconv:src> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<audio-sink:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<sink:proxypad1> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<audioTee:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<audioTee:src_0> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<queue0:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<queue0:src> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<audioconvert0:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<audioconvert0:src> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<audioresample0:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<audioresample0:src> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<volume:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-CRITICAL **: 14:51:26.089: gst_segment_to_stream_time: assertion 'segment->format == format' failed

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<volume:src> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<audioconvert1:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<audioconvert1:src> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<audioresample1:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<audioresample1:src> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<autoaudiosink0:sink> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4549:gst_pad_push_data:<sink:proxypad0> Got data flow before segment event

(WebKitWebProcess:170): GStreamer-WARNING **: 14:51:26.089: ../gst/gstpad.c:4296:gst_pad_chain_data_unchecked:<autoaudiosink0-actual-sink-pulse:sink> Got data flow before segment event

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