How to add transparent watermark in center of a vi

Question

I am currently using these commands:

Top left corner
ffmpeg –i inputvideo.avi -vf "movie=watermarklogo.png [watermark]; [in][watermark] overlay=10:10 [out]" outputvideo.flv

Top right corner
ffmpeg –i inputvideo.avi -vf "movie=watermarklogo.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:10 [out]" outputvideo.flv

Bottom left corner
ffmpeg –i inputvideo.avi -vf "movie=watermarklogo.png [watermark]; [in][watermark] overlay=10:main_h-overlay_h-10 [out]" outputvideo.flv

Bottom right corner
ffmpeg –i inputvideo.avi -vf "movie=watermarklogo.png [watermark]; [in][watermark] overlay=(main_w-overlay_w-10)/2:(main_h-overlay_h-10)/2 [out]" outputvideo.flv

How to place watermark center of the video ?

Answer 1

Examples to overlay/watermark image on video:

Centered

ffmpeg -i input.mp4 -i logo.png -filter_complex \
"overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2" \
-codec:a copy output.mp4

or with the shortened overlay options:

overlay=(W-w)/2:(H-h)/2

Top left

This is the easy one because the default, if you provide no options to overlay, is to place the image in the top left.

This example adds 5 pixels of padding so the image is not touching the edges:

overlay=5:5

Top right

With 5 pixels of padding:

overlay=main_w-overlay_w-5:5

or with the shortened options:

overlay=W-w-5:5

Bottom right

With 5 pixels of padding:

overlay=main_w-overlay_w-5:main_h-overlay_h-5

or with the shortened options:

overlay=W-w-5:H-h-5

Bottom left

With 5 pixels of padding:

overlay=5:main_h-overlay_h

or with the shortened options:

overlay=5:H-h-5

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Notes

• The audio is simply stream copied (remuxed) in this example with -codec:a copy instead of being re-encoded. You may have to re-encode depending on your output container format.

• See the documentation on the overlay video filter for more information and examples.

• See the FFmpeg H.264 Video Encoding Guide for more information on getting a good quality output.

• If your image being overlaid is RGB colorspace (such as most PNG images) you may see a visual improvement if you add format=rbg to your overlay. Note that if you do this and if you're outputting H.264, then you will have to add format=yuv420p (this is another filer–it is different that the similarly named option in the overlay filter). So it may look like this:

  overlay=5:H-h-5:format=rgb,format=yuv420p