Gstreamer元素内存泄漏

Question

How to find memory leak problem in the gstreamer elements/plugins? How to analyse the gst refcount for memory/object leak/refcount? any examples? I am using appsrc and appsink to push and pull buffer to and from the gstreamer pipeline. Seems like there is some memory issue with these elements. I have live source which feeds data to pipeline, typically what are the properties to be set on appsrc and appsink for the live source? Thanks-opensid

Answer 1

You can use tools like valgrind (memcheck) or asan (address sanitizer) to check for such issues. Refcount issues are tricky to find.

Answer 2

If you're using the AppSrc sample then there's a rather easy solution which is to wrap the Gst.Buffer allocation in a using statement.

EG Change the following method

static void PushAppData (object o, Gst.App.NeedDataArgs args) {
  ulong mseconds = 0;
  if (appsrc.Clock != null)
    mseconds = appsrc.Clock.Time / Clock.MSecond;
  Gst.Buffer buffer = DrawData (mseconds);
  appsrc.PushBuffer (buffer);
}

to this

static void PushAppData (object o, Gst.App.NeedDataArgs args) {
  ulong mseconds = 0;
  if (appsrc.Clock != null)
    mseconds = appsrc.Clock.Time / Clock.MSecond;
  using(Gst.Buffer buffer = DrawData (mseconds))
    appsrc.PushBuffer (buffer);
}

Previously for my this sample would crash in <30 seconds. Now it runs until I kill it.

Answer 3

Try using Valgrind tool

see this sample: http://cs.ecs.baylor.edu/~donahoo/tools/valgrind/