左右合并视频

[downgoon]

ffmpeg -i left.mp4 -i right.mp4 -filter_complex "[0:v][1:v]hstack=inputs=2[v]; [0:a][1:a]amerge[a]" -map "[v]" -map "[a]" -ac 2 sidebyside.mp4

输入：left.mp4 和 right.mp4 两个视频
输出：sidebyside.mp4
样例：

[downgoon]

https://stackoverflow.com/questions/42255139/ffmpeg-merge-two-videos-into-one-with-side-by-side-same-quality-output