1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
import { VideoModel } from '../models/video/video'
import { basename, join, dirname } from 'path'
import { CONFIG, HLS_STREAMING_PLAYLIST_DIRECTORY } from '../initializers'
import { close, ensureDir, move, open, outputJSON, pathExists, read, readFile, remove, writeFile } from 'fs-extra'
import { getVideoFileSize } from '../helpers/ffmpeg-utils'
import { sha256 } from '../helpers/core-utils'
import { VideoStreamingPlaylistModel } from '../models/video/video-streaming-playlist'
import { logger } from '../helpers/logger'
import { doRequest, doRequestAndSaveToFile } from '../helpers/requests'
import { generateRandomString } from '../helpers/utils'
import { flatten, uniq } from 'lodash'
async function updateMasterHLSPlaylist (video: VideoModel) {
const directory = join(HLS_STREAMING_PLAYLIST_DIRECTORY, video.uuid)
const masterPlaylists: string[] = [ '#EXTM3U', '#EXT-X-VERSION:3' ]
const masterPlaylistPath = join(directory, VideoStreamingPlaylistModel.getMasterHlsPlaylistFilename())
for (const file of video.VideoFiles) {
// If we did not generated a playlist for this resolution, skip
const filePlaylistPath = join(directory, VideoStreamingPlaylistModel.getHlsPlaylistFilename(file.resolution))
if (await pathExists(filePlaylistPath) === false) continue
const videoFilePath = video.getVideoFilePath(file)
const size = await getVideoFileSize(videoFilePath)
const bandwidth = 'BANDWIDTH=' + video.getBandwidthBits(file)
const resolution = `RESOLUTION=${size.width}x${size.height}`
let line = `#EXT-X-STREAM-INF:${bandwidth},${resolution}`
if (file.fps) line += ',FRAME-RATE=' + file.fps
masterPlaylists.push(line)
masterPlaylists.push(VideoStreamingPlaylistModel.getHlsPlaylistFilename(file.resolution))
}
await writeFile(masterPlaylistPath, masterPlaylists.join('\n') + '\n')
}
async function updateSha256Segments (video: VideoModel) {
const json: { [filename: string]: { [range: string]: string } } = {}
const playlistDirectory = join(HLS_STREAMING_PLAYLIST_DIRECTORY, video.uuid)
// For all the resolutions available for this video
for (const file of video.VideoFiles) {
const rangeHashes: { [range: string]: string } = {}
const videoPath = join(playlistDirectory, VideoStreamingPlaylistModel.getHlsVideoName(video.uuid, file.resolution))
const playlistPath = join(playlistDirectory, VideoStreamingPlaylistModel.getHlsPlaylistFilename(file.resolution))
// Maybe the playlist is not generated for this resolution yet
if (!await pathExists(playlistPath)) continue
const playlistContent = await readFile(playlistPath)
const ranges = getRangesFromPlaylist(playlistContent.toString())
const fd = await open(videoPath, 'r')
for (const range of ranges) {
const buf = Buffer.alloc(range.length)
await read(fd, buf, 0, range.length, range.offset)
rangeHashes[`${range.offset}-${range.offset + range.length - 1}`] = sha256(buf)
}
await close(fd)
const videoFilename = VideoStreamingPlaylistModel.getHlsVideoName(video.uuid, file.resolution)
json[videoFilename] = rangeHashes
}
const outputPath = join(playlistDirectory, VideoStreamingPlaylistModel.getHlsSha256SegmentsFilename())
await outputJSON(outputPath, json)
}
function getRangesFromPlaylist (playlistContent: string) {
const ranges: { offset: number, length: number }[] = []
const lines = playlistContent.split('\n')
const regex = /^#EXT-X-BYTERANGE:(\d+)@(\d+)$/
for (const line of lines) {
const captured = regex.exec(line)
if (captured) {
ranges.push({ length: parseInt(captured[1], 10), offset: parseInt(captured[2], 10) })
}
}
return ranges
}
function downloadPlaylistSegments (playlistUrl: string, destinationDir: string, timeout: number) {
let timer
logger.info('Importing HLS playlist %s', playlistUrl)
return new Promise<string>(async (res, rej) => {
const tmpDirectory = join(CONFIG.STORAGE.TMP_DIR, await generateRandomString(10))
await ensureDir(tmpDirectory)
timer = setTimeout(() => {
deleteTmpDirectory(tmpDirectory)
return rej(new Error('HLS download timeout.'))
}, timeout)
try {
// Fetch master playlist
const subPlaylistUrls = await fetchUniqUrls(playlistUrl)
const subRequests = subPlaylistUrls.map(u => fetchUniqUrls(u))
const fileUrls = uniq(flatten(await Promise.all(subRequests)))
logger.debug('Will download %d HLS files.', fileUrls.length, { fileUrls })
for (const fileUrl of fileUrls) {
const destPath = join(tmpDirectory, basename(fileUrl))
const bodyKBLimit = 10 * 1000 * 1000 // 10GB
await doRequestAndSaveToFile({ uri: fileUrl }, destPath, bodyKBLimit)
}
clearTimeout(timer)
await move(tmpDirectory, destinationDir, { overwrite: true })
return res()
} catch (err) {
deleteTmpDirectory(tmpDirectory)
return rej(err)
}
})
function deleteTmpDirectory (directory: string) {
remove(directory)
.catch(err => logger.error('Cannot delete path on HLS download error.', { err }))
}
async function fetchUniqUrls (playlistUrl: string) {
const { body } = await doRequest<string>({ uri: playlistUrl })
if (!body) return []
const urls = body.split('\n')
.filter(line => line.endsWith('.m3u8') || line.endsWith('.mp4'))
.map(url => {
if (url.startsWith('http://') || url.startsWith('https://')) return url
return `${dirname(playlistUrl)}/${url}`
})
return uniq(urls)
}
}
// ---------------------------------------------------------------------------
export {
updateMasterHLSPlaylist,
updateSha256Segments,
downloadPlaylistSegments
}
// ---------------------------------------------------------------------------
|
