This script can be used to convert a stream layout to a vertical layout.
Before
After
The script was configured specifically for https://www.twitch.tv/videos/1861733765
$ ./thab streams/The\ Best\ SMW\ Hack\ this\ side\ of\ the\ Mississippi.mp4 out.mp4
$ open out.mp4
| #!/usr/bin/env bash | |
| # | |
| # Convert a stream layout into a vertical layout. | |
| # | |
| # Author: Dave Eddy <[email protected]> | |
| # Date: July 05, 2023 | |
| # License: MIT | |
| input=$1 | |
| output=$2 | |
| # This script works by creating a blank video of size 1080x1920 at 60fps (of | |
| # just the color black). Then, it reads data from an input video (presumed to | |
| # be a 1080p video containing gameplay and a facecam) to crop out the gameplay | |
| # and facecam and overlay it on the new 9:16 vertical video. The audio feed is | |
| # copied directly from the source video to the destination. | |
| # | |
| # The _crop variables are in the format of: | |
| # | |
| # width:height:offsetX:offsetY | |
| # | |
| # So in the example of: | |
| # | |
| # gameplay_crop='1250:920:640:135' | |
| # | |
| # This means the area of the gameplay we want is 1250px by 920px, and starts | |
| # 640px in from the left and 135px down from the top. | |
| # | |
| # --- | |
| # | |
| # The _scale variables are in the format of: | |
| # | |
| # width:height | |
| # | |
| # and this will force scale (resize) the video to fit the given dimensions. The | |
| # number "-1" can be used for one of the variables to have it be automatically | |
| # be calculated and maintain aspect ratio. For example, if a video is 250x500 | |
| # pixels in size, a scale of "-1:1000" will result in the video size being | |
| # "500:1000". | |
| # | |
| # This script makes the assumption that the facecam will be at the top of the | |
| # resulting video and the gameplay will be at the bottom of the resulting video, | |
| # so the facecam video will "grow down" from the top when increased in size, and | |
| # the gameplay will "grow up" from the bottom increased in size - with the | |
| # facecam ultimately "winning" (being on top). | |
| # | |
| # NOTE: this script was specifically tested with | |
| # https://www.twitch.tv/thabeast721/videos | |
| gameplay_crop='1250:1070:720:10' | |
| gameplay_scale='-1:1300' | |
| facecam_crop='600:380:0:630' | |
| facecam_scale='1200:-1' | |
| # XXX NOTE: the `-t 5` argument will make it so only 5 seconds are rendered - | |
| # this is useful for when you are adjusting variables and want to see the | |
| # result quickly. Remove that line before running this for real. | |
| ffmpeg \ | |
| -f lavfi -i 'color=c=black:s=1080x1920:r=60/1' \ | |
| -i "$input" \ | |
| -t 5 \ | |
| -filter_complex " | |
| [1]crop = $gameplay_crop [gameplay]; | |
| [gameplay]scale = $gameplay_scale [gameplay]; | |
| [0][gameplay]overlay = (main_w / 2) - (overlay_w / 2) : main_h - overlay_h [canvas]; | |
| [1]crop = $facecam_crop [facecam]; | |
| [facecam]scale = $facecam_scale [facecam]; | |
| [canvas][facecam]overlay = 0:0 | |
| " \ | |
| -c:a copy \ | |
| -n "$output" |