ddmpeg

a personal project to make an ffmpeg wrapper that trims videos, sets target file size

usage

ddmpeg -i <input> -o <output> [-r <range>] [-s <size>] [-m <1[,...]>] [-d]

flag	description	usage
input or i	specify input file	-i infile.mp4
output or o	specify output file	-o outfile.mp4
trim or t	specify trim range. must contain a dash, remove one argument to specify the start/end of the video	-t 2m40s:3m
size or s	specify target size of video	-s 4m (4 MB)
merge or m	merge audio tracks into one track, can optionally specify weights for each track. All unlisted tracks assume 1 as the weight.	-m or -m 2,3

examples

trim a video

• Trim video to only include 3min to 3min 30sec
  • ddmpeg -i in.mp4 -o out.mp4 -t 3m:3m30s
• Trim video to include everything after 4mins 34.3secs
  • ddmpeg -i in.mp4 -o out.mp4 -t 4m34.3s:
• Trim video to only include the first 30 seconds
  • ddmpeg -i in.mp4 -o out.mp4 -t :30s

audio stuff

• Merge audio tracks with equal weights
  • ddmpeg -i in.mp4 -o out.mp4 -m 1
• Merge audio tracks, with the second track being louder than the first
  • ddmpeg -i in.mp4 -o out.mp4 -m 1,5

set target size

• Try to shoot for a 30MB video
  • ddmpeg -i in.mp4 -o out.mp4 -s 30m

putting it all together

• Share your Valorant clip!
  • Your clipping software captures 5 minutes, but you only want the last 30 seconds.
  • The first audio stream has your desktop sounds, and the second audio stream has your microphone sounds.
  • Your microphone was pretty loud, so you want to make sure that has less weight when we mix the streams.
  • You're going to share this on Discord, so you can't let it go over 100MB
    • ddmpeg -i in.mp4 -o out.mp4 -t 4m30s: -m 3,1 -s 75m

installation (from source)

1. install deno
2. clone this repo
   1. https: git clone https://github.com/deanveloper/ddmpeg
   2. ssh: git@github.com:deanveloper/ddmpeg.git
3. deno compile --allow-read --allow-run main.ts
4. cp the newly created binary somewhere in your PATH (ie /usr/local/bin on *nix)