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-rw-r--r--shared/extra-utils/miscs/generate.ts61
1 files changed, 61 insertions, 0 deletions
diff --git a/shared/extra-utils/miscs/generate.ts b/shared/extra-utils/miscs/generate.ts
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+++ b/shared/extra-utils/miscs/generate.ts
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1import { ensureDir, pathExists } from 'fs-extra'
2import { dirname } from 'path'
3import { buildAbsoluteFixturePath } from './tests'
4import * as ffmpeg from 'fluent-ffmpeg'
5
6async function generateHighBitrateVideo () {
7 const tempFixturePath = buildAbsoluteFixturePath('video_high_bitrate_1080p.mp4', true)
8
9 await ensureDir(dirname(tempFixturePath))
10
11 const exists = await pathExists(tempFixturePath)
12 if (!exists) {
13 console.log('Generating high bitrate video.')
14
15 // Generate a random, high bitrate video on the fly, so we don't have to include
16 // a large file in the repo. The video needs to have a certain minimum length so
17 // that FFmpeg properly applies bitrate limits.
18 // https://stackoverflow.com/a/15795112
19 return new Promise<string>((res, rej) => {
20 ffmpeg()
21 .outputOptions([ '-f rawvideo', '-video_size 1920x1080', '-i /dev/urandom' ])
22 .outputOptions([ '-ac 2', '-f s16le', '-i /dev/urandom', '-t 10' ])
23 .outputOptions([ '-maxrate 10M', '-bufsize 10M' ])
24 .output(tempFixturePath)
25 .on('error', rej)
26 .on('end', () => res(tempFixturePath))
27 .run()
28 })
29 }
30
31 return tempFixturePath
32}
33
34async function generateVideoWithFramerate (fps = 60) {
35 const tempFixturePath = buildAbsoluteFixturePath(`video_${fps}fps.mp4`, true)
36
37 await ensureDir(dirname(tempFixturePath))
38
39 const exists = await pathExists(tempFixturePath)
40 if (!exists) {
41 console.log('Generating video with framerate %d.', fps)
42
43 return new Promise<string>((res, rej) => {
44 ffmpeg()
45 .outputOptions([ '-f rawvideo', '-video_size 1280x720', '-i /dev/urandom' ])
46 .outputOptions([ '-ac 2', '-f s16le', '-i /dev/urandom', '-t 10' ])
47 .outputOptions([ `-r ${fps}` ])
48 .output(tempFixturePath)
49 .on('error', rej)
50 .on('end', () => res(tempFixturePath))
51 .run()
52 })
53 }
54
55 return tempFixturePath
56}
57
58export {
59 generateHighBitrateVideo,
60 generateVideoWithFramerate
61}