/usr/share/mlt/profiles/square_ntsc is in libmlt-data 6.6.0-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 | description=VGA NTSC
frame_rate_num=30000
frame_rate_den=1001
width=640
height=480
progressive=1
sample_aspect_num=1
sample_aspect_den=1
display_aspect_num=4
display_aspect_den=3
colorspace=601
|