dffmpeg

Description

This is a simple FFmpeg library wrapper (requires ffmpeg to be installed). The core is an FFmpeg class with methods which have names similar or identical to existing library arguments. On top of that there's also validation and typing included.

Usage

If we'd want to rotate a video 90 degrees using 2 threads with the veryfast preset while also adding some metadata and we'd have FFmpeg installed and in the path

import { ffmpeg } from "https://deno.land/x/dffmpeg/mod.ts"
// you can also import the class directly and create a new
// instance of it

const process = ffmpeg()
    .input("big_buck_bunny.mp4")
    .threads(2)
    .preset("veryfast")
    .rotate(1)
    .metadata({ title: "Title", author: "John Doe" })
    .overwrite() // overwrite any existing output files
    .output("output.mp4")

await process.run()

Methods

Remember to use methods in the same order you would use arguments when running ffmpeg from the command line! For example if you use a format method before an input method it will apply to that input if you add it after the last input it will apply to the output.

Here's a list of all currently available methods (with example inputs). If there's a method missing feel free to create an issue of a PR on GitHub-

• execPath() - Pass a custom location of the ffmpeg binary
• input() - Add an input
• output() - Add an output
• format() - Set format
• videoCodec() - Set video codec
• audioCodec() - Set audio codec
• videoBitrate() - Set video bitrate
• audioBitrate() - Set audio bitrate
• frameRate() - Set frameRate
• bufsize() - Set buffer size
• preset() - Set preset
• crf() - Set Constant Rate Factor
• strict("experimental") - Set strict
• errDetect("ignore_err") - Set error detection level
• map("1:3") - "Designate one or more input streams as a source for the output file"
• threads(4) - Set the amount of threads to use
• banner() - Show the banner (hidden by default)
• copy() - Just copy the input video and audio encoding
• copyVideo() - Just copy the input video encoding
• copyAudio() - Just copy the input audio encoding
• rotate(2) or rotate("clock") - Set rotate level
• tune("film") - Set tune
• deinterlace() - Deinterlace
• removeAudio() - Completely remove the audio track
• removeVideo() - Extract the audio only
• overwrite() - Overwrite any existing output files
• metadata({ title: "Title", author: "John Doe" }) - Add metadata
• maxRate("2M") - Set a limited bitrate
• gop(30) - Use a 2 second Group of Pictures (framerate * 2)
• videoSize() - Set video size
• timeOffset(60) - Add a time offset (in seconds)
• copyCodec() - Copy the input codec
• duration() - Limit the max time duration
• scale(1080, 1920) - Scale the input
• shortest() - Finish the encoding when the shortest clip ends.
• pixelFormat("yuv420p") - Set a custom pixel format
• audioChannels(2) - Set a custom number of audio channels
• filterComplex("...") - Add a custom complex filter
• loop() or loop(3) - Loop an image
• streamLoop() - Loop the input
• nativeSourceFrameRate() - Use the native frame rate of the source
• flags("+flag_name") - Add a flag