I have a few hundred video files from a security camera. Let's say here's the full frame:
+---------------------+-------------------------+
| 2018-10-10 03:02:12 | |
+---------------------+ |
| +--------------+ |
| | IMPORTANT | |
| +--------------+ |
| |
+-----------------------------------------------+
I have 2 areas that I want to keep: the date and the inner box. I know how to crop to either of them, for example:
ffmpeg -i in.mp4 -filter:v "crop=1120:320:40:60" -c:a copy out.mpg
However what I'd like to be able to do is to rearrange the frame to get this in the output:
+---------------------+
| 2018-10-10 03:02:12 |
+------+--------------+
| X X X| IMPORTANT |
+------+--------------+
(X X X would be just black, or if that's hard to do then it can be whatever part of the original video) Any idea how can I do this?
You can crop the two segments and then stack them vertically.
ffmpeg -i in.mp4 -filter_complex "[0]split=2[tc][imp];[tc]crop=1120:320:40:60[tc];
[imp]crop=800:400:1300:150,pad=1120:ih:1120-iw:0[imp];
[tc][imp]vstack" -c:a copy out.mpg
When stacked vertically, the segments have to be the same width so (black) padding is added.