[Development] is property compliance of vah264dec an int or a string?

[cfd new]

I made a pipeline to receive rtsp streaming with vah264dec compliance=flexible.The pipeline runs fine from command line. But there is an error when I use gstreamer code 
to build the pipeline in C/C++. The error shows the property compliance is not set properly.When I set int 3(flexible) to the property compliance. The error is gone. Is there anyinconsistency here? This is on Ubuntu 22.04 and gstreamer 1.22.2.
   Joe
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