The minicap command exit automatic while run with './run.sh autosize'.
Here is output of the command :

INFO: Using projection 1440x2560@1440x2560/0
INFO: (external/MY_minicap/src/minicap_24.cpp:240) Creating SurfaceComposerClient
INFO: (external/MY_minicap/src/minicap_24.cpp:243) Performing SurfaceComposerClient init check
INFO: (external/MY_minicap/src/minicap_24.cpp:250) Creating virtual display
INFO: (external/MY_minicap/src/minicap_24.cpp:256) Creating buffer queue
INFO: (external/MY_minicap/src/minicap_24.cpp:261) Creating CPU consumer
INFO: (external/MY_minicap/src/minicap_24.cpp:265) Creating frame waiter
INFO: (external/MY_minicap/src/minicap_24.cpp:269) Publishing virtual display
INFO: (jni/minicap/JpgEncoder.cpp:64) Allocating 11061252 bytes for JPG encoder
INFO: (external/MY_minicap/src/minicap_24.cpp:284) Destroying virtual display