本文介绍了扩展并缩放人像视频,使长宽比保持不变,黑色边框成为视频的模糊版本的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有一个720 x 1280像素的视频.我如何将其扩展和缩放到1920 x 1080,以保持宽高比并且黑色边框是视频的模糊版本,所以您并没有真正注意到它只是一个小的垂直条纹.

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.

示例

我从

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

推荐答案

使用

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

调整boxblur滤镜中的两个值以获得模糊强度.更高=更模糊.

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

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10-30 02:45