![]() Using amerge, the combined audio will only be as long as the shortest input.The amerge filter will combine all input channels, then -ac 2 will downmix them to stereo: ffmpeg -i top_left.mp4 -i bottom_left.mp4 -i top_right.mp4 -i bottom_right.mp4 -filter_complex \ jpg -geometry 375x250 2 2 -tile 2x2 result.jpg Download ImageMagick I've purposely made the images blurry. Depending on your shell, you may need to quote the map value. I've tried: ffmpeg -i video1.mp4 -i video2.mp4 -filtercomplex ' 1 0scale2ref 2nd ref ref 2ndvstack' -map vid -c:v libx264 -crf 23 -preset. 1 Answer Sorted by: 3 Use ffmpeg -i video1.mp4 -i video2.mp4 -filtercomplex ' 1 0scale2refiw:ow/mdar 2nd ref ref 2ndvstack vid' -map vid -c:v libx264 -crf 23 -preset veryfast output.mp4 The vstack output pad hasn't been labelled, so the map won't refer to anything. The top video is 1920x1080, and the bottom video is 3240x1080. I want to stack one on top of the other, retaining their respective aspect ratios. jpg -tile 2x2 result.jpg It will take the first four images and make result-0.jpg, the next four and make result-1.jpg and so on. I have two videos that are different widths. Use *stack=shortest=1 if you want the filter output to terminate when the shortest input terminates.ฤก0px border between left
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