“cmd.load_traj” reads trajectory files (currently just AMBER files). The file extension is used to determine the format.

AMBER files must end in “.trj”

cmd.load_traj(filename,object='',state=0,format='',interval=1,
              average=1,start=1,stop=-1,max=-1,selection='all',image=1,
              shift="[0.0,0.0,0.0]")

def load_traj(filename,object='',state=0,format='',interval=1,
                  average=1,start=1,stop=-1,max=-1,selection='all',image=1,
                  shift="[0.0,0.0,0.0]",plugin=""):

load_traj | cmd.load | api