CODEWITHSUNDEEP
videoffmpegcropvideo-editing
Gavriel
Gavriel

Reputation: 19237

crop, rearrange middle of video frame with ffmpeg

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?

Upvotes: 1

Views: 664

Answers (1)

Gyan
Gyan

Reputation: 93008

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.

Upvotes: 2

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