Deepstream test3 python working slow

hi when running two videos simultaneosly for the deepstream python test 3 app of video of mp4 format on jetson nano the video starts to lag and this error
Warning: gst-core-error-quark: A lot of buffers are being dropped. (13): gstbasesink.c(2902): gst_base_sink_is_too_late (): /GstPipeline:pipeline0/GstEglGlesSink:nvvideo-renderer:
There may be a timestamping problem, or this computer is too slow.
comes.can anyone please tell a solution for this

Sorry for a late reply.
You could set sink property sync to false.