Hi! Which linux distribution do you use? If you are using the latest Ubuntu (17.04 is the version I think) or Debian then you need to install gstreamer1.0-gl. See also https://bugs.webkit.org/show_bug.cgi?id=184925 <https://bugs.webkit.org/show_bug.cgi?id=184925>
Philippe
> On 1 Jun 2018, at 08:43, tugouxp <13824125...@163.com> wrote:
>
> hi folks:
> i make a test about video player with video tag based on midori and
> webkit2.22.2, but seems only when i disable "GSTREAMER_GL", the display
> window can be displayed normally.
> if the GSTREAMER_GL was enabled, the decoder process working fine but the
> browser cant show the player window, just a blank window.
> so,from the code, it seems the difference between the two test is the display
> sinker of gstreamer pipe was different.
> 1.if GSTRREAMER_GL enabled, it would be use the display sinker
> "createVideoSinkGL" returned
> 2.if GSTRREAMER_GL disabled, the default display sinker would be webkit video
> sink.
>
> seems only method 2 can use, but i found another problem when using the way
> 2(webkit videw sinker), that is when playing high quality streamer with
> browser, the cpu occupancy rate was very high (about 50 percent) of process
> 'webkitwebprocess'.
>
> so i dont know how to choice, which is the better way to deal with this
> problem, much appreciate your help!
>
> codes:
>
> 1108 GstElement* MediaPlayerPrivateGStreamerBase::createVideoSink()
>
>
> 1109 {
>
>
> 1110 acceleratedRenderingStateChanged();
>
>
> 1111
>
>
> 1112 #if USE(GSTREAMER_GL)
>
>
> 1113 if (m_renderingCanBeAccelerated)
>
>
> 1114 ¦ m_videoSink = createVideoSinkGL();
>
>
> 1115 #endif
>
>
> 1116
>
>
> 1117 if (!m_videoSink) {
>
>
> 1118 ¦ m_usingFallbackVideoSink = true;
>
>
> 1119 ¦ m_videoSink = webkitVideoSinkNew();
>
>
> 1120 ¦ g_signal_connect_swapped(m_videoSink.get(), "repaint-requested",
> G_CALLBACK(repaintCallback), this);
>
> 1121 ¦ g_signal_connect_swapped(m_videoSink.get(), "repaint-cancelled",
> G_CALLBACK(repaintCancelledCallback), this);
>
> 1122 }
>
>
> 1123
>
>
> 1124 GstElement* videoSink = nullptr;
>
>
> 1125 m_fpsSink = gst_element_factory_make("fpsdisplaysink", "sink");
>
>
> 1126 if (m_fpsSink) {
>
>
> 1127 ¦ g_object_set(m_fpsSink.get(), "silent", TRUE , nullptr);
>
>
> 1128
>
>
> 1129 ¦ // Turn off text overlay unless logging is enabled.
>
>
> 1130 #if LOG_DISABLED
>
>
> 1131 ¦ g_object_set(m_fpsSink.get(), "text-overlay", FALSE , nullptr);
>
>
> 1132 #else
>
>
> 1133 ¦ if (!isLogChannelEnabled("Media"))
>
>
> 1134 ¦ ¦ g_object_set(m_fpsSink.get(), "text-overlay", FALSE ,
> nullptr);
>
> 1135 #endif // LOG_DISABLED
>
>
> 1136
>
>
> 1137 ¦ if
> (g_object_class_find_property(G_OBJECT_GET_CLASS(m_fpsSink.get()),
> "video-sink")) {
>
> 1138 ¦ ¦ g_object_set(m_fpsSink.get(), "video-sink",
> m_videoSink.get(), nullptr);
>
> 1139 ¦ ¦ videoSink = m_fpsSink.get();
>
>
> 1140 ¦ } else
>
>
> 1141 ¦ ¦ m_fpsSink = nullptr;
>
>
> 1142 }
>
>
> 1143
>
>
> 1144 if (!m_fpsSink)
>
>
> 1145 ¦ videoSink = m_videoSink.get();
>
>
> 1146
>
>
> 1147 ASSERT(videoSink);
>
>
> 1148
>
>
> 1149 return videoSink;
>
>
>
>
>
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