Removing / Overlaying logo on mp4 video format with ffmpeg on linux

Question

I'm trying to remove a logo from an .MP4 video format with ffmpeg on a Linux machine without re-encoding (for preserving the same quality) with the following command:

ffmpeg -i input.mp4 -vf delogo=x=270:y=190:w=40:h=40 -c:a copy output.mp4 

and it gives me the following errors:

Unrecognized option 'vf'

then a new error came up:

Unable to find a suitable output format for 'delogo=x=270:y=190:w=40:h=40'

ffmpeg is always updating and it seems that they change command line arguments a lot so any material or tutorial I find online seems to get outdated quickly.

I review their website documentation but can't get it to work, I think i'm missing something...?

What is the correct command line in Linux shell; also, how to view or find out exactly the area coordinates to be removed before actually removing logo/overlaying it and keep testing every while? And how to overlay a solid color in certain area instead of removing logo transparently as well?

Answer 1

Your command is missing double quotes around the filter definition :

ffmpeg -i input.mp4 -vf "delogo=x=270:y=190:w=40:h=40" -c:a copy output.mp4

(as explained in FFmpeg filters documentation)

Nevertheless, this filter will decode and re-encode your video stream.