FFParser

Parse input stream by frames directly into your code as a buffer.

LIMITATION: this library doesn't work with mp4 video format, due to the fact that mp4 video is not frame-by-frame output to stdout.

Install

npm i ffparser

Example

const FFParser = require('ffparser');
const fs = require("fs");

new FFParser('rtsp://184.72.239.149/vod/mp4:BigBuckBunny_115k.mov')
    .setFrameRate('1/1')
    .setQuality(2)
    .setFrameHandler((frame) => fs.writeFile('image.jpeg', frame, () => {}))
    .run();

This simple command will parse the provided stream at a frame rate of ~ 1 fps and with the highest quality. The resulting frames are saved in a file.
You can try this example in the test directory.

Docs

FFParser(inputPath: string, customArgs?: string[])
inputPath (required) - URL or path to input video stream customArgs (optional) - Custom ffmpeg params. Will override the existing ones.

setFrameRate(frameRate: string): FFParser - setup the output frame rate. NOTE: this works approximately!
frameRate (required) - in format '1/2' means 1 frame per 2 seconds. Defaulr value is 1/1. You cannot specify more than the value of the stream itself

setQuality(quality: number): FFParser - defines the quality of the output JPEG image.
quality (required) - available range from 1 to 31, where a lower value means better quality. Default value is 2

enableLogs(): FFParser - show ffmpeg logs in console

setFrameHandler(fn: FrameHandlerFn): FFParser - setup a callback function which will produce new frames.
fn = (frame: Buffer, info?: FrameInformation) => void
frame - new frame as a buffer
info - frame information

FrameInformation {
    frameNumber: string; // frame number from the beginning of parsing
    fps: string;
    quality: string;
    time: string; // time from the beginning of parsing
}

run(): void - start parsing

How to build

npm run tsc

Will create a build directory with the compiled lib, and test.