命令将视频水平或垂直切成两半，然后再重新加入 [英] Commands to cut videos in half horizontally or vertically, and rejoin them later

问题描述

如何使用ffmpeg将视频按分辨率垂直或水平切成两半；因此，对于640 x 480的视频，我想将其分成分辨率为320 x 480的两半，或者将其水平分成640 x 240的两半；之后，我需要能够再次加入分开的视频，以制作具有原始分辨率的单个视频.该怎么办?

How can I use ffmpeg to cut video in half, vertically or horizontally by resolution; so for a 640 x 480 video, I want to separate that into two halves with a resolution of 320 x 480, or to separate it into two halves horizontally with a resolution of 640 x 240; and afterward, I need to be able to join the separated videos again to make a single video with the original resolution. How can this be done?

推荐答案

分成两半

使用作物过滤器:

ffmpeg -i input -filter_complex "[0]crop=iw:ih/2:0:0[top];[0]crop=iw:ih/2:0:oh[bottom]" -map "[top]" top.mp4 -map "[bottom]" bottom.mp4

垂直

ffmpeg -i input -filter_complex "[0]crop=iw/2:ih:0:0[left];[0]crop=iw/2:ih:ow:0[right]" -map "[left]" left.mp4 -map "[right]" right.mp4

加入分开的视频

使用使用ffmpeg垂直或水平堆叠多个视频的vstack/hstack过滤器?

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