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import * as ffmpeg from 'fluent-ffmpeg'
import { ensureDir, pathExists } from 'fs-extra'
import { dirname } from 'path'
import { buildAbsoluteFixturePath } from './tests'
async function generateHighBitrateVideo () {
const tempFixturePath = buildAbsoluteFixturePath('video_high_bitrate_1080p.mp4', true)
await ensureDir(dirname(tempFixturePath))
const exists = await pathExists(tempFixturePath)
if (!exists) {
console.log('Generating high bitrate video.')
// Generate a random, high bitrate video on the fly, so we don't have to include
// a large file in the repo. The video needs to have a certain minimum length so
// that FFmpeg properly applies bitrate limits.
// https://stackoverflow.com/a/15795112
return new Promise<string>((res, rej) => {
ffmpeg()
.outputOptions([ '-f rawvideo', '-video_size 1920x1080', '-i /dev/urandom' ])
.outputOptions([ '-ac 2', '-f s16le', '-i /dev/urandom', '-t 10' ])
.outputOptions([ '-maxrate 10M', '-bufsize 10M' ])
.output(tempFixturePath)
.on('error', rej)
.on('end', () => res(tempFixturePath))
.run()
})
}
return tempFixturePath
}
async function generateVideoWithFramerate (fps = 60) {
const tempFixturePath = buildAbsoluteFixturePath(`video_${fps}fps.mp4`, true)
await ensureDir(dirname(tempFixturePath))
const exists = await pathExists(tempFixturePath)
if (!exists) {
console.log('Generating video with framerate %d.', fps)
return new Promise<string>((res, rej) => {
ffmpeg()
.outputOptions([ '-f rawvideo', '-video_size 1280x720', '-i /dev/urandom' ])
.outputOptions([ '-ac 2', '-f s16le', '-i /dev/urandom', '-t 10' ])
.outputOptions([ `-r ${fps}` ])
.output(tempFixturePath)
.on('error', rej)
.on('end', () => res(tempFixturePath))
.run()
})
}
return tempFixturePath
}
export {
generateHighBitrateVideo,
generateVideoWithFramerate
}
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