GStreamer: enable dynamic pipeline modification for capture session

Work in progress...

Change-Id: I4423745a9d229e509aa161cd6a0a28647f5579e9
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 6 insertions, 4 deletions

diff --git a/src/multimedia/platform/gstreamer/common/qgstvideobuffer.cpp b/src/multimedia/platform/gstreamer/common/qgstvideobuffer.cpp
index b93cb9eac..878b4d410 100644
--- a/src/multimedia/platform/gstreamer/common/qgstvideobuffer.cpp
+++ b/src/multimedia/platform/gstreamer/common/qgstvideobuffer.cpp
@@ -88,16 +88,18 @@ QT_BEGIN_NAMESPACE
 QGstVideoBuffer::QGstVideoBuffer(GstBuffer *buffer, const GstVideoInfo &info, QGstreamerVideoSink *sink,
                                  const QVideoFrameFormat &frameFormat,
                                  QGstCaps::MemoryFormat format)
-    : QAbstractVideoBuffer((sink->rhi() && format != QGstCaps::CpuMemory) ?
-                            QVideoFrame::RhiTextureHandle : QVideoFrame::NoHandle, sink->rhi())
+    : QAbstractVideoBuffer((sink && sink->rhi() && format != QGstCaps::CpuMemory) ?
+                            QVideoFrame::RhiTextureHandle : QVideoFrame::NoHandle, sink ? sink->rhi() : nullptr)
     , memoryFormat(format)
     , m_frameFormat(frameFormat)
     , m_videoInfo(info)
     , m_buffer(buffer)
 {
     gst_buffer_ref(m_buffer);
-    eglDisplay = sink->eglDisplay();
-    eglImageTargetTexture2D = sink->eglImageTargetTexture2D();
+    if (sink) {
+        eglDisplay =  sink->eglDisplay();
+        eglImageTargetTexture2D = sink->eglImageTargetTexture2D();
+    }
 }
 
 QGstVideoBuffer::~QGstVideoBuffer()