a solution could be to add an option to openshot-render command to allow the use of affine processing to be turned on, this could set use_affine to "Yes" if chosen by user and leave it disabled by default.
I am the one that coded the command-line render, but I've been away from openshot for a long time, and I'm not sure I could tweak the code myself now, things have changed a lot meanwhile
a solution could be to add an option to openshot-render command to allow the use of affine processing to be turned on, this could set use_affine to "Yes" if chosen by user and leave it disabled by default.
I am the one that coded the command-line render, but I've been away from openshot for a long time, and I'm not sure I could tweak the code myself now, things have changed a lot meanwhile