GST_DEBUG_OBJECT(GST_PAD_PARENT(((GstCollectData*)data)->pad),"(%s): time = [%"GST_TIME_SECONDS_FORMAT", %"GST_TIME_SECONDS_FORMAT")\n",GST_PAD_NAME(((GstCollectData*)data)->pad),GST_TIME_SECONDS_ARGS(buf_t_start),GST_TIME_SECONDS_ARGS(buf_t_end));
if(buf_t_end<buf_t_start){
GST_LOG("%p: input buffer appears to have negative length\n",data);
GST_DEBUG_OBJECT(GST_PAD_PARENT(((GstCollectData*)data)->pad),"input buffer appears to have negative length");