RecordRTC is WebRTC JavaScript library for audio/video as well as screen activity recording. It supports Chrome, Firefox, Opera, Android, and Microsoft Edge. Platforms: Linux, Mac and Windows.
Converting the image to & from base64 is a waste of time, cpu and memory
it can do job much faster if you ditch the FileReader and just create a system link to where the raw bytes are instead
img.src = URL.createObjectURL(file)
Optional: If you want you can also use promises instead of using the img.onload
img.decode().then(() => {
// img done loading, can be painted on the canvas
})
Something even better if you intend to use it on canvas is to createImageBitmap(file).then(paint) instead of using FileReader, or Image. But it is not so much cross compatible
https://github.com/muaz-khan/RecordRTC/blob/ebae1da10f50a521000cbcced5c5adfb96f32411/Canvas-Recording/canvas-designer.js#L2519-L2532
Converting the image to & from base64 is a waste of time, cpu and memory it can do job much faster if you ditch the FileReader and just create a system link to where the raw bytes are instead
Optional: If you want you can also use promises instead of using the img.onload
Something even better if you intend to use it on canvas is to
createImageBitmap(file).then(paint)instead of using FileReader, or Image. But it is not so much cross compatible