v4l2videodec: use v4l2 capture buffer pool when link v4l2 video decoder with fakesink
v4l2 video decoder will copy video decoded frame when link with fakesink. It cause harder to check performance with fakesink. Below code cause the issue. Can we avoid it?
gboolean gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query) {
can_share_own_pool = (has_video_meta || !obj->need_video_meta);
}