ffmpeg.wasm barebones wrapper

This is a minimal wrapper around ffmpeg-core.wasm from https://github.com/ffmpegwasm/ffmpeg.wasm

Demo: https://diafygi.github.io/ffmpeg-wasm-barebones/

Why I did this

I wanted to learn the internal ffmpeg.wasm API, so I made a custom wrapper around it that allows more direct command access to the internal worker wasm API. Also, this is way smaller and more lightweight than the default ffmpeg.js.

How to use

const ffmpegCoreAPI = await loadFFmpegCoreAPI(config);
const result = await ffmpegCoreAPI(cmd, cmdArgs, cmdArgsTranferObjects);

Where:

• cmd - string of command that you wish to call on ffmpeg-core (e.g. "exec" or "FS.writeFile")
• cmdArgs - [optional] arguments to pass to that command (default is [])
• cmdArgsTranferObjects - [optional] a list of any objects in the cmdArgs that need to be transferred to the worker as a TransferObject (default is [])

Available commands

ffmpegCoreAPI("setTimeout", [timeout]) // sets timeout for exec
ffmpegCoreAPI("exec", [execArgs]) // sets timeout for exec
ffmpegCoreAPI("ret") // latest return code from ffmpeg exec
ffmpegCoreAPI("reset") // reset the ffmpeg wasm
ffmpegCoreAPI("FS.writeFile", [path, data], [data.buffer]) // write Uint8Array as file to the virtual "file system"
ffmpegCoreAPI("FS.readFile", [path, { encoding: "binary" }]) // read file as Uint8Array from the virtual "file system"
ffmpegCoreAPI("FS.unlink", [path]) // delete a file
ffmpegCoreAPI("FS.rename", [oldPath, newPath]) // rename/move a file
ffmpegCoreAPI("FS.mkdir", [path]) // create a folder
ffmpegCoreAPI("FS.readdir", [path]) // list the contents for a folder
ffmpegCoreAPI("FS.stat", [path]) // get the system details of a file or folder
ffmpegCoreAPI("FS.isDir", [stat.mode]) // determine whether the file/folder's stat.mode is a folder
ffmpegCoreAPI("FS.rmdir", [path]) // remove a folder
ffmpegCoreAPI("FS.mount", [fsType, options, mountPoint]) // mount a new filesystem
ffmpegCoreAPI("FS.unmount", [mountPoint]) // unmount a previously mounted filesystem

License

Released under the MIT license.