#!/usr/bin/env zx

if (argv._.length < 1) {
  console.log("Usage: mp4 [--half] input [output]")
  process.exit(0)
}

const input = argv._[0]
const output =
  argv._.length > 1
    ? argv._[1]
    : (() => {
        const { dir, name } = path.parse(input)
        return path.join(dir, `${name}.mp4`)
      })()

await $`ffmpeg -i ${input} -c:v h264_videotoolbox -r 30 ${
  argv.half ? "-filter:v scale=iw/2:-1" : ""
} -c:a copy ${output}`