mediasnacks

Utilities optimizing and preparing video and images for the web.

Usage Overview

FFmpeg and Node.js must be installed.

npx mediasnacks <command> <args>

Commands:

• avif Converts images to AVIF

• resize Resizes videos or images

• sqcrop Square crops images

• moov2front Rearranges .mov and .mp4 metadata for fast-start streaming

• dropdups Removes duplicate frames in a video

• seqcheck Finds missing sequence number

• qdir Sequentially runs all *.sh files in a folder

• hev1tohvc1: Fixes video thumbnails not rendering in macOS Finder

• framediff: Plays a video of adjacent frames diff

• vdiff: Plays a video with the difference of two videos

• vconcat: Concatenates videos

• dlaudio: yt-dlp best audio

• dlvideo: yt-dlp best video

• unemoji: Removes emojis from filenames

• rmcover: Removes cover art

• curltime: Measures request response timings

• gif: Video to GIF

• vcut: Split video in two parts at a given time

• flattendir: Moves unique files to the top dir and deletes empty dirs

Converting Images to AVIF

npx mediasnacks avif [-y | --overwrite] [--output-dir=<dir>] <images> 

Resizing Images or Videos

Resizes videos and images. The aspect ratio is preserved when only one dimension is specified.

--width and --height are -2 by default:

• -1 auto-compute while preserving the aspect ratio (may result in an odd number)
• -2 same as -1 but rounds to the nearest even number

npx mediasnacks resize [--width=<num>] [--height=<num>] [-y | --overwrite] [--output-dir=<dir>] <files>

Example: Overwrites the input file (-y)

npx mediasnacks resize -y --width 480 'dir-a/**/*.png' 'dir-b/**/*.mp4'

Example: Output directory (-o)

npx mediasnacks resize --height 240 --output-dir /tmp/out video.mov

Fast-Start Streaming Video

Rearranges .mov and .mp4 metadata to the start of the file for fast-start streaming.

Files are overwritten

npx mediasnacks moov2front <videos>

hat is Fast Start?

• https://wiki.avblocks.com/avblocks-for-cpp/muxer-parameters/mp4
• https://trac.ffmpeg.org/wiki/HowToCheckIfFaststartIsEnabledForPlayback

License

MIT