CODEWITHSUNDEEP
ffmpeg
Aurelius Schnitzler
Aurelius Schnitzler

Reputation: 531

Extend + scale a portrait video so the aspect ratio stays and the black borders become a blurry version of the video

I have a 720 x 1280 pixels video. How do I extend and scale it to 1920 x 1080 such that the aspect ratio is being kept and the black borders are a blurry version of the video, so you don't really notice that it's just a small vertical stripe.

Example

enter image description here

enter image description here

I started with

ffmpeg -i video720x1280.mp4 -vf "scale=608:1080,pad=width=1920:height=1080:x=656:y=0:color=black" video1920x1080.mp4

Upvotes: 3

Views: 1728

Answers (1)

Gyan
Gyan

Reputation: 93068

Use

ffmpeg -i video720x1280.mp4
  -filter_complex
      "[0]scale=hd1080,setsar=1,boxblur=20:20[b];
       [0]scale=-1:1080[v];[b][v]overlay=(W-w)/2"   video1920x1080.mp4

Adjust the two values in the boxblur filter for blur strength. Higher = more blurring.

Upvotes: 6

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