[Webkit-unassigned] [Bug 242156] New: REGRESSION(243836 at main): Broke videos in yelp

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=242156

            Bug ID: 242156
           Summary: REGRESSION(243836 at main): Broke videos in yelp
           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
                CC: bugs-noreply at webkitgtk.org, jer.noble at apple.com

243836 at main "[iOS] AVAssetResourceLoadingRequest.request does not include a Range: header on iOS 15" broke video playback in yelp (the GNOME help viewer, not yelp.com).

The GStreamer debug log contains several errors:

0:00:00.146036288  4822 0x561c5fcb4600 DEBUG      webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:1840:operator(): got missing plugin installation callback with result 203
0:00:00.146095073  4822 0x561c5fcb4600 WARN               structure gststructure.c:1863:priv_gst_structure_append_to_gstring: No value transform to serialize field 'gerror' of type 'GError'
0:00:00.146122003  4822 0x561c5fcb4600 ERROR           webkitcommon GStreamerCommon.cpp:466:operator():<media-player-0> Got message: error message: 0x561c60385cb0, time 99:99:99.999999999, seq-num 59, element 'uridecodebin0', GstMessageError, gerror=(GError)NULL, debug=(string)"gsturidecodebin.c\(1409\):\ gen_source_element\ \(\):\ /GstPlayBin:media-player-0/GstURIDecodeBin:uridecodebin0";
0:00:00.146147649  4822 0x561c5fcb4600 LOG        webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:1708:handleMessage:<media-player-0> Message error received from element uridecodebin0
0:00:00.146180206  4822 0x561c5fcb4600 WARN               structure gststructure.c:1863:priv_gst_structure_append_to_gstring: No value transform to serialize field 'gerror' of type 'GError'
0:00:00.146202578  4822 0x561c5fcb4600 ERROR           webkitcommon GStreamerCommon.cpp:466:operator():<media-player-1> Got message: error message: 0x561c603a0a30, time 99:99:99.999999999, seq-num 139, element 'uridecodebin1', GstMessageError, gerror=(GError)NULL, debug=(string)"gsturidecodebin.c\(1409\):\ gen_source_element\ \(\):\ /GstPlayBin:media-player-1/GstURIDecodeBin:uridecodebin1";
0:00:00.146224398  4822 0x561c5fcb4600 LOG        webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:1708:handleMessage:<media-player-1> Message error received from element uridecodebin1
0:00:00.146254924  4822 0x561c5fcb4600 ERROR      webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:1714:handleMessage: Error 12: No URI handler implemented for "bogus-help". (url=bogus-help:/gnome-help/figures/gnome-task-switching.webm)
0:00:00.146349303  4822 0x561c5fcb4600 WARN               structure gststructure.c:1863:priv_gst_structure_append_to_gstring: No value transform to serialize field 'gerror' of type 'GError'
0:00:00.146389031  4822 0x561c5fcb4600 ERROR           webkitcommon GStreamerCommon.cpp:466:operator():<media-player-2> Got message: error message: 0x561c603b21c0, time 99:99:99.999999999, seq-num 219, element 'uridecodebin2', GstMessageError, gerror=(GError)NULL, debug=(string)"gsturidecodebin.c\(1409\):\ gen_source_element\ \(\):\ /GstPlayBin:media-player-2/GstURIDecodeBin:uridecodebin2";
0:00:00.146428686  4822 0x561c5fcb4600 LOG        webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:1708:handleMessage:<media-player-2> Message error received from element uridecodebin2
0:00:00.146452332  4822 0x561c5fcb4600 ERROR      webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:1714:handleMessage: Error 12: No URI handler implemented for "bogus-help". (url=bogus-help:/gnome-help/figures/gnome-windows-and-workspaces.webm)

I tried to throw together a minimal reproducer, but wound up hitting strange errors because I'm not familiar with mallard syntax. So instead my hacky test case is: clone gnome-user-doc, then hack up gnome-help/C/display-dual-monitors.page accordingly:

diff --git a/gnome-help/C/display-dual-monitors.page b/gnome-help/C/display-dual-monitors.page
index 6f74da61..b5d779db 100644
--- a/gnome-help/C/display-dual-monitors.page
+++ b/gnome-help/C/display-dual-monitors.page
@@ -29,10 +29,9 @@

 <title>Connect another monitor to your computer</title>

-<!-- TODO: update video
 <section id="video-demo">
   <title>Video Demo</title>
-  <media its:translate="no" type="video" width="500" mime="video/webm" src="figures/display-dual-monitors.webm">
+  <media its:translate="no" type="video" width="500" mime="video/webm" src="/home/mcatanzaro/big-buck-bunny_trailer.webm">
     <p its:translate="yes">Demo</p>
     <tt:tt its:translate="yes" xmlns:tt="http://www.w3.org/ns/ttml">
       <tt:body>
@@ -69,7 +68,6 @@
     </tt:tt>
   </media>
 </section>
--->

   <comment>
     <cite date="2018-07-29" href="mailto:mdhillca at gmail.com">Michael Hill</cite>

Note the hardcoded path to my home directory, which would need to be changed. I used the video from https://dl8.webmfiles.org/big-buck-bunny_trailer.webm but I doubt that matters. Then run:

$ yelp gnome-help/C/display-dual-monitors.page

Before 243836 at main, the big buck bunny video will play. With 243836 at main it no longer plays. Note that all of the changes in this commit are platform-specific except for the change to HTMLMediaElement.cpp.

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