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 <13824125580 at 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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