make -C DeepStream_Release/sources/apps/deepstream-test1/

Hi,
I compile and run the example,there is something wrong

make -C DeepStream_Release/sources/apps/deepstream-test1/
cd DeepStream_Release/sources/apps/deepstream-test1 &&
./deepstream-test1-app …/…/…/samples/streams/sample_720p.h264

When I run the application, I can just see :

Now playing: …/…/…/samples/streams/sample_720p.h264
Running…

And add some code and compiled again
ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
if (ret == GST_STATE_CHANGE_FAILURE) {
g_printerr (“Unable to set the pipeline to the playing state.\n”);
gst_object_unref (pipeline);
return -1;
}

when I run the application ,print:
Unable to set the pipeline to the playing state

GPU is P40

Can you give the “git diff” or where you add these code ?