Gstreamer command line to C/C++ code issue

[haipt]

Dear all, I'm a newbie in GStreamer. The below command line use to display
RTSP from IP Camera and save RTSP to MP4 file. When I run command on Ubuntu
16.04 terminal, everything is ok. But when I convert to C code and compile,
then run compiled application on terminal, it doesn't run. Please help me.
Thanks all!
Command line: gst-launch-1.0 -e rtspsrc latency=200
location=rtsp://192.168.40.142:554/av0_0 ! rtph264depay ! h264parse ! tee
name = t ! queue ! avdec_h264 ! autovideosink t. ! queue ! mp4mux ! filesink
location=/home/haipt/xxx.mp4



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