@calipsa/video-utils/src/getFrameAt/index.ts

Video utilities

import ffmpeg, {
  FfmpegCommand,
  FfmpegCommandOptions,
} from 'fluent-ffmpeg'

import {
  StreamWithBuffer,
} from '@calipsa/stream-utils'

interface Options {
  path: string,
  time: number,
  ffmpegCommandOptions?: FfmpegCommandOptions,
  configureFfmpeg?: (ffmpegCommand: FfmpegCommand) => void,
}

export default async ({
  path,
  time,
  ffmpegCommandOptions,
  configureFfmpeg,
}: Options) => {
  const outStream = new StreamWithBuffer()
  const vcodec = 'mjpeg'

  return new Promise<Buffer>((resolve, reject) => {
    const proc = ffmpeg(path, ffmpegCommandOptions)
      .output(outStream, {
        end: true,
      })
      .noAudio()
      .setStartTime(time)
      .format('image2pipe')
      .videoCodec(vcodec)
      .size('640x480')
      .outputOptions([
        '-frames:v 1',
        '-q:v 2',
      ])
      .on('error', reject)
      .on('end', () => {
        resolve(outStream.buffer)
      })

    configureFfmpeg?.(proc)

    proc.run()
  })
}