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I'm applying a watermark to a video. I'm trying to get the watermark to scale proportionally to the video dimensions. I've seen maybe a dozen different answers using scale2ref, but no explanations as to actually what's happening, so I'm finding it difficult to know how to implement/make changes to the configs to work for my situation.
Current overlay command:
ffmpeg -i test.mp4 -i logo.png -filter_complex "overlay=0:0" output.mp4
Some answers I've looked at:
ffmpeg creating gif from images, add watermark during creation?
ffmpeg fix watermark size or percentage
What are the rules to how scale2ref works?
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FFmpeg offers the overlay filter as a way to overlay images (or even other videos) onto video streams. To centre overlay/watermark on a video, use this command: ffmpeg -i inputvideo.avi -i watermarklogo.png -filter_complex \ "overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2" -codec:a copy output.flv.
ffmpeg is a command-line tool that converts audio or video formats. It can also capture and encode in real-time from various hardware and software sources such as a TV capture card. ffplay is a simple media player utilizing SDL and the FFmpeg libraries.
Apply this filter to position the watermark
Center:
overlay=(main_w-w)/2:(main_h-h)/2
Top left corner:
overlay=1:1
Top right corner:
overlay=W-w-1:1
lower right corner:
overlay=W-w-1:H-h-1
Bottom left corner:
overlay=1:H-h-1
Bottom right corner. Padding 10px to the right and -10px to the bottom:
overlay=main_w-w/1:main_h-h/2
Bottom right corner. Padding -10px to the right and -10px to the bottom:
overlay=main_w-w/1:main_h-h/2
Center:
-filter_complex "overlay=(main_w-w)/2:(main_h-h)/2" -preset ultrafast -codec:a copy
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