Function ffprobe

server.js:447–471

(filePath)

}

async function ffprobe(filePath) {
  const args = [
    "-v", "error",
    "-show_entries", "stream=codec_type,width,height,r_frame_rate,avg_frame_rate,nb_frames,duration",
    "-show_entries", "format=duration",
    "-of", "json",
    filePath
  ];
  const { stdout } = await run(FFPROBE, args);
  const parsed = JSON.parse(stdout.toString());
  const streams = parsed.streams || [];
  const stream = streams.find(item => item.codec_type === "video") || {};
  const audio = streams.find(item => item.codec_type === "audio");
  const duration = Number(stream.duration || parsed.format?.duration || 0);
  const fps = ratioToNumber(stream.avg_frame_rate || stream.r_frame_rate || "24/1") || 24;
  const frames = Number(stream.nb_frames) || Math.round(duration * fps);
  return {
    width: Number(stream.width),
    height: Number(stream.height),
    fps,
    frames,
    duration,
    hasAudio: Boolean(audio)
  };
}

function ratioToNumber(value) {
  const [a, b] = String(value).split("/").map(Number);