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Yang Zhang
Yang Zhang

Reputation: 51

ffmpeg delogo works not good when delogo at boundary

I am trying using ffmpeg delogo filter to hide the logo, but I found when the logo is appears at boundary, delogo filter seems works not good. please check following images.

enter image description here enter image description here

I also read a bit of source, seems the algorithm need subtract 1 pixel boundary. in the second image, the delogo result is looks strange, bottom is white. I want to make it invisible, is it possible?

thanks

Upvotes: 0

Views: 1788

Answers (1)

Gyan
Gyan

Reputation: 93319

Try

ffmpeg -i video
  -filter_complex
     "[0]split[m][b];
      [b]crop=iw:144:0:174,vflip[a];
      [m][a]vstack,delogo=794:689:134:40:1,crop=iw:720:0:0"  out.mp4

The video is split in two. The 2nd feed is cropped to the bottom 20% but ending at a height just above the logo. This is then flipped and vertically stacked with the main stream. delogo is applied making sure that the height of the logo covers the whole logo. Then the excess portion at the bottom is cropped off.

Result:

enter image description here

Upvotes: 4

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