Comment 2 for bug 1315691

StacktraceTop:
 gst_mini_object_unref (mini_object=0x100000005) at gstminiobject.c:442
 gst_mini_object_replace (olddata=olddata@entry=0x7ff5d80fad10, newdata=0x0) at gstminiobject.c:513
 gst_buffer_replace (nbuf=<optimized out>, obuf=0x7ff5d80fad10) at /usr/include/gstreamer-1.0/gst/gstbuffer.h:475
 gst_ffmpegviddec_video_frame (ffmpegdec=ffmpegdec@entry=0x7ff5d8033b90, data=<optimized out>, data@entry=0x7ff5d904f9b0 "", size=<optimized out>, frame=frame@entry=0x7ff5cc293830, ret=ret@entry=0x7ff5dedf759c) at gstavviddec.c:1229
 gst_ffmpegviddec_frame (ffmpegdec=ffmpegdec@entry=0x7ff5d8033b90, data=data@entry=0x7ff5d904f9b0 "", size=size@entry=117918, got_data=got_data@entry=0x7ff5dedf7598, frame=frame@entry=0x7ff5cc293830, ret=ret@entry=0x7ff5dedf759c) at gstavviddec.c:1371