<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>219822</bug_id>
          
          <creation_ts>2020-12-11 21:43:12 -0800</creation_ts>
          <short_desc>REGRESSION(r270612) [GStreamer][MSE] Some play/seek related failures</short_desc>
          <delta_ts>2020-12-22 10:29:17 -0800</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>Media</component>
          <version>WebKit Nightly Build</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          <see_also>https://bugs.webkit.org/show_bug.cgi?id=219565</see_also>
    
    <see_also>https://bugs.webkit.org/show_bug.cgi?id=220055</see_also>
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>InRadar</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Lauro Moura">lmoura</reporter>
          <assigned_to name="Philippe Normand">pnormand</assigned_to>
          <cc>aboya</cc>
    
    <cc>bugs-noreply</cc>
    
    <cc>calvaris</cc>
    
    <cc>cgarcia</cc>
    
    <cc>eocanha</cc>
    
    <cc>ews-watchlist</cc>
    
    <cc>gustavo</cc>
    
    <cc>menard</cc>
    
    <cc>peng.liu6</cc>
    
    <cc>pnormand</cc>
    
    <cc>vjaquez</cc>
    
    <cc>webkit-bug-importer</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1714230</commentid>
    <comment_count>0</comment_count>
    <who name="Lauro Moura">lmoura</who>
    <bug_when>2020-12-11 21:43:12 -0800</bug_when>
    <thetext>After the fix of bug219565, there are still some failures playing/seeking, likely related to r270612.

List of tests failing locally (to be gardened together with the fix of bug219565):

# Failures

imported/w3c/web-platform-tests/media-source/mediasource-buffered-seek.html [ Failure ]
imported/w3c/web-platform-tests/media-source/mediasource-changetype-play-negative.html [ Failure ]
imported/w3c/web-platform-tests/media-source/mediasource-h264-play-starved.html [ Failure ]
imported/w3c/web-platform-tests/media-source/mediasource-liveseekable.html [ Failure ]
imported/w3c/web-platform-tests/media-source/mediasource-play-then-seek-back.html [ Failure ]
imported/w3c/web-platform-tests/media-source/mediasource-redundant-seek.html [ Failure ]
imported/w3c/web-platform-tests/media-source/mediasource-seek-during-pending-seek.html [ Failure ]
imported/w3c/web-platform-tests/media-source/mediasource-seekable.html [ Failure ]
imported/w3c/web-platform-tests/media-source/mediasource-sequencemode-append-buffer.html [ Failure ]
media/media-source/media-source-canplaythrough-event.html [ Failure ]
media/media-source/media-source-stalled-holds-sleep-assertion.html [ Failure ]
media/media-source/media-source-unnecessary-seek-seeked.html [ Failure ]

# Timeouts
imported/w3c/web-platform-tests/media-source/mediasource-video-is-visible.html [ Timeout ]
media/encrypted-media/clearKey/clearKey-cenc-audio-playback-mse.html [ Timeout ]
media/encrypted-media/clearKey/clearKey-cenc-video-playback-mse.html [ Timeout ]
media/media-source/media-source-paint-to-canvas.html [ Timeout ]
media/media-source/media-source-seek-redundant-append.html [ Timeout ]
media/media-source/media-source-seek-twice.html [ Timeout ]</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1714420</commentid>
    <comment_count>1</comment_count>
    <who name="Philippe Normand">pnormand</who>
    <bug_when>2020-12-14 04:15:20 -0800</bug_when>
    <thetext>Adding MSE experts in CC...

I had a quick look, the append pipeline sink receives no sample and that triggers a typefind error down the line during seeks...</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1715995</commentid>
    <comment_count>2</comment_count>
    <who name="Philippe Normand">pnormand</who>
    <bug_when>2020-12-21 04:37:34 -0800</bug_when>
    <thetext>The biggest issue is that allSamplesInTrackEnqueued() is now called too early and signals EOS even before the pipeline had a chance to preroll. This regression was introduced in r270612.

I&apos;m preparing a patch...</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1715997</commentid>
    <comment_count>3</comment_count>
    <who name="Philippe Normand">pnormand</who>
    <bug_when>2020-12-21 04:40:33 -0800</bug_when>
    <thetext>Another issue is that the SourceBufferPrivateGStreamer doesn&apos;t call appendComplete(), so the parent class doesn&apos;t correctly synchronize the TrackBuffer buffered ranges.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1715998</commentid>
    <comment_count>4</comment_count>
    <who name="Alicia Boya García">aboya</who>
    <bug_when>2020-12-21 04:53:37 -0800</bug_when>
    <thetext>(In reply to Philippe Normand from comment #2)
&gt; The biggest issue is that allSamplesInTrackEnqueued() is now called too
&gt; early and signals EOS even before the pipeline had a chance to preroll. This
&gt; regression was introduced in r270612.
&gt; 
&gt; I&apos;m preparing a patch...

I&apos;m also working on this.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1716196</commentid>
    <comment_count>5</comment_count>
      <attachid>416660</attachid>
    <who name="Philippe Normand">pnormand</who>
    <bug_when>2020-12-22 04:04:13 -0800</bug_when>
    <thetext>Created attachment 416660
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1716202</commentid>
    <comment_count>6</comment_count>
      <attachid>416660</attachid>
    <who name="Xabier Rodríguez Calvar">calvaris</who>
    <bug_when>2020-12-22 05:07:09 -0800</bug_when>
    <thetext>Comment on attachment 416660
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=416660&amp;action=review

r+ conditional to what Alicia thinks of this

&gt; Source/WebCore/platform/graphics/gstreamer/mse/SourceBufferPrivateGStreamer.cpp:196
&gt; +    SourceBufferPrivate::appendCompleted(true, m_mediaSource ? m_mediaSource-&gt;isEnded() : true);

Is it necessary to prepend the superclass name? Method is protected and should be available in the subclass, right?

&gt; Source/WebCore/platform/graphics/gstreamer/mse/SourceBufferPrivateGStreamer.cpp:201
&gt; +    SourceBufferPrivate::appendCompleted(false, m_mediaSource ? m_mediaSource-&gt;isEnded() : true);

Ditto.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1716254</commentid>
    <comment_count>7</comment_count>
      <attachid>416660</attachid>
    <who name="Alicia Boya García">aboya</who>
    <bug_when>2020-12-22 10:03:50 -0800</bug_when>
    <thetext>Comment on attachment 416660
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=416660&amp;action=review

LGTM

&gt;&gt; Source/WebCore/platform/graphics/gstreamer/mse/SourceBufferPrivateGStreamer.cpp:196
&gt;&gt; +    SourceBufferPrivate::appendCompleted(true, m_mediaSource ? m_mediaSource-&gt;isEnded() : true);
&gt; 
&gt; Is it necessary to prepend the superclass name? Method is protected and should be available in the subclass, right?

It&apos;s not necessary, but I appreciate it, since it shows explicitly that we&apos;re jumping to the multiplatform code. The refactor mushed together SourceBufferPrivateGStreamer and SourceBufferPrivate and has since made noticing this difference harder.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1716258</commentid>
    <comment_count>8</comment_count>
    <who name="EWS">ews-feeder</who>
    <bug_when>2020-12-22 10:28:31 -0800</bug_when>
    <thetext>Committed r271056: &lt;https://trac.webkit.org/changeset/271056&gt;

All reviewed patches have been landed. Closing bug and clearing flags on attachment 416660.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1716259</commentid>
    <comment_count>9</comment_count>
    <who name="Radar WebKit Bug Importer">webkit-bug-importer</who>
    <bug_when>2020-12-22 10:29:17 -0800</bug_when>
    <thetext>&lt;rdar://problem/72592069&gt;</thetext>
  </long_desc>
      
          <attachment
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              isprivate="0"
          >
            <attachid>416660</attachid>
            <date>2020-12-22 04:04:13 -0800</date>
            <delta_ts>2020-12-22 10:28:32 -0800</delta_ts>
            <desc>Patch</desc>
            <filename>bug-219822-20201222040411.patch</filename>
            <type>text/plain</type>
            <size>7540</size>
            <attacher name="Philippe Normand">pnormand</attacher>
            
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          </attachment>
      

    </bug>

</bugzilla>