-- Final Practice Solutions
1.
[left.mp4]crop=1920:1920:0:0[out_left];
[right.mp4]crop=1920:1920:0:0[out_right];
[out_left][out_right]vstack;
(
Edited: 2019-05-20)
1.
[left.mp4]crop=1920:1920:0:0[out_left];
[right.mp4]crop=1920:1920:0:0[out_right];
[out_left][out_right]vstack;