Exiftool doesn't return some data when run in AWS lambda

Question

Running ExifTool(10.68) locally on a .mpg or a .mpeg returns the field Composite:Duration. ExifTool itself is called from python code as a subprocess with switches -j -G -n. When this python runs as a lambda function on AWS, the Composite:Duration just isn't there. FileSize is also missing on AWS.

With other formats like .avi it works both locally and on AWS.

Tried using other parameters for exiftool, -a -U -q, without any success.

proc = subprocess.Popen([self.EXIFTOOL, '-j', '-G', '-n', '-'],
                                        stdin=subprocess.PIPE,
                                        stdout=subprocess.PIPE,
                                        stderr=subprocess.PIPE)

To sum up I expect the same data is returned on AWS as on local