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1 | import { FfprobeData } from 'fluent-ffmpeg' | |
2 | import { getMaxBitrate } from '@shared/core-utils' | |
3 | import { VideoResolution, VideoTranscodingFPS } from '../../shared/models/videos' | |
4 | import { CONFIG } from '../initializers/config' | |
5 | import { VIDEO_TRANSCODING_FPS } from '../initializers/constants' | |
6 | import { logger } from './logger' | |
7 | import { | |
8 | canDoQuickAudioTranscode, | |
9 | ffprobePromise, | |
10 | getDurationFromVideoFile, | |
11 | getAudioStream, | |
12 | getMaxAudioBitrate, | |
13 | getMetadataFromFile, | |
14 | getVideoFileBitrate, | |
15 | getVideoFileFPS, | |
16 | getVideoFileResolution, | |
17 | getVideoStreamFromFile, | |
18 | getVideoStreamSize | |
19 | } from '@shared/extra-utils/ffprobe' | |
20 | ||
21 | /** | |
22 | * | |
23 | * Helpers to run ffprobe and extract data from the JSON output | |
24 | * | |
25 | */ | |
26 | ||
27 | async function getVideoStreamCodec (path: string) { | |
28 | const videoStream = await getVideoStreamFromFile(path) | |
29 | ||
30 | if (!videoStream) return '' | |
31 | ||
32 | const videoCodec = videoStream.codec_tag_string | |
33 | ||
34 | if (videoCodec === 'vp09') return 'vp09.00.50.08' | |
35 | if (videoCodec === 'hev1') return 'hev1.1.6.L93.B0' | |
36 | ||
37 | const baseProfileMatrix = { | |
38 | avc1: { | |
39 | High: '6400', | |
40 | Main: '4D40', | |
41 | Baseline: '42E0' | |
42 | }, | |
43 | av01: { | |
44 | High: '1', | |
45 | Main: '0', | |
46 | Professional: '2' | |
47 | } | |
48 | } | |
49 | ||
50 | let baseProfile = baseProfileMatrix[videoCodec][videoStream.profile] | |
51 | if (!baseProfile) { | |
52 | logger.warn('Cannot get video profile codec of %s.', path, { videoStream }) | |
53 | baseProfile = baseProfileMatrix[videoCodec]['High'] // Fallback | |
54 | } | |
55 | ||
56 | if (videoCodec === 'av01') { | |
57 | const level = videoStream.level | |
58 | ||
59 | // Guess the tier indicator and bit depth | |
60 | return `${videoCodec}.${baseProfile}.${level}M.08` | |
61 | } | |
62 | ||
63 | // Default, h264 codec | |
64 | let level = videoStream.level.toString(16) | |
65 | if (level.length === 1) level = `0${level}` | |
66 | ||
67 | return `${videoCodec}.${baseProfile}${level}` | |
68 | } | |
69 | ||
70 | async function getAudioStreamCodec (path: string, existingProbe?: FfprobeData) { | |
71 | const { audioStream } = await getAudioStream(path, existingProbe) | |
72 | ||
73 | if (!audioStream) return '' | |
74 | ||
75 | const audioCodecName = audioStream.codec_name | |
76 | ||
77 | if (audioCodecName === 'opus') return 'opus' | |
78 | if (audioCodecName === 'vorbis') return 'vorbis' | |
79 | if (audioCodecName === 'aac') return 'mp4a.40.2' | |
80 | ||
81 | logger.warn('Cannot get audio codec of %s.', path, { audioStream }) | |
82 | ||
83 | return 'mp4a.40.2' // Fallback | |
84 | } | |
85 | ||
86 | function computeLowerResolutionsToTranscode (videoFileResolution: number, type: 'vod' | 'live') { | |
87 | const configResolutions = type === 'vod' | |
88 | ? CONFIG.TRANSCODING.RESOLUTIONS | |
89 | : CONFIG.LIVE.TRANSCODING.RESOLUTIONS | |
90 | ||
91 | const resolutionsEnabled: number[] = [] | |
92 | ||
93 | // Put in the order we want to proceed jobs | |
94 | const resolutions: VideoResolution[] = [ | |
95 | VideoResolution.H_NOVIDEO, | |
96 | VideoResolution.H_480P, | |
97 | VideoResolution.H_360P, | |
98 | VideoResolution.H_720P, | |
99 | VideoResolution.H_240P, | |
100 | VideoResolution.H_144P, | |
101 | VideoResolution.H_1080P, | |
102 | VideoResolution.H_1440P, | |
103 | VideoResolution.H_4K | |
104 | ] | |
105 | ||
106 | for (const resolution of resolutions) { | |
107 | if (configResolutions[resolution + 'p'] === true && videoFileResolution > resolution) { | |
108 | resolutionsEnabled.push(resolution) | |
109 | } | |
110 | } | |
111 | ||
112 | return resolutionsEnabled | |
113 | } | |
114 | ||
115 | async function canDoQuickTranscode (path: string): Promise<boolean> { | |
116 | if (CONFIG.TRANSCODING.PROFILE !== 'default') return false | |
117 | ||
118 | const probe = await ffprobePromise(path) | |
119 | ||
120 | return await canDoQuickVideoTranscode(path, probe) && | |
121 | await canDoQuickAudioTranscode(path, probe) | |
122 | } | |
123 | ||
124 | async function canDoQuickVideoTranscode (path: string, probe?: FfprobeData): Promise<boolean> { | |
125 | const videoStream = await getVideoStreamFromFile(path, probe) | |
126 | const fps = await getVideoFileFPS(path, probe) | |
127 | const bitRate = await getVideoFileBitrate(path, probe) | |
128 | const resolutionData = await getVideoFileResolution(path, probe) | |
129 | ||
130 | // If ffprobe did not manage to guess the bitrate | |
131 | if (!bitRate) return false | |
132 | ||
133 | // check video params | |
134 | if (videoStream == null) return false | |
135 | if (videoStream['codec_name'] !== 'h264') return false | |
136 | if (videoStream['pix_fmt'] !== 'yuv420p') return false | |
137 | if (fps < VIDEO_TRANSCODING_FPS.MIN || fps > VIDEO_TRANSCODING_FPS.MAX) return false | |
138 | if (bitRate > getMaxBitrate({ ...resolutionData, fps })) return false | |
139 | ||
140 | return true | |
141 | } | |
142 | ||
143 | function getClosestFramerateStandard <K extends keyof Pick<VideoTranscodingFPS, 'HD_STANDARD' | 'STANDARD'>> (fps: number, type: K) { | |
144 | return VIDEO_TRANSCODING_FPS[type].slice(0) | |
145 | .sort((a, b) => fps % a - fps % b)[0] | |
146 | } | |
147 | ||
148 | function computeFPS (fpsArg: number, resolution: VideoResolution) { | |
149 | let fps = fpsArg | |
150 | ||
151 | if ( | |
152 | // On small/medium resolutions, limit FPS | |
153 | resolution !== undefined && | |
154 | resolution < VIDEO_TRANSCODING_FPS.KEEP_ORIGIN_FPS_RESOLUTION_MIN && | |
155 | fps > VIDEO_TRANSCODING_FPS.AVERAGE | |
156 | ) { | |
157 | // Get closest standard framerate by modulo: downsampling has to be done to a divisor of the nominal fps value | |
158 | fps = getClosestFramerateStandard(fps, 'STANDARD') | |
159 | } | |
160 | ||
161 | // Hard FPS limits | |
162 | if (fps > VIDEO_TRANSCODING_FPS.MAX) fps = getClosestFramerateStandard(fps, 'HD_STANDARD') | |
163 | ||
164 | if (fps < VIDEO_TRANSCODING_FPS.MIN) { | |
165 | throw new Error(`Cannot compute FPS because ${fps} is lower than our minimum value ${VIDEO_TRANSCODING_FPS.MIN}`) | |
166 | } | |
167 | ||
168 | return fps | |
169 | } | |
170 | ||
171 | // --------------------------------------------------------------------------- | |
172 | ||
173 | export { | |
174 | getVideoStreamCodec, | |
175 | getAudioStreamCodec, | |
176 | getVideoStreamSize, | |
177 | getVideoFileResolution, | |
178 | getMetadataFromFile, | |
179 | getMaxAudioBitrate, | |
180 | getVideoStreamFromFile, | |
181 | getDurationFromVideoFile, | |
182 | getAudioStream, | |
183 | computeFPS, | |
184 | getVideoFileFPS, | |
185 | ffprobePromise, | |
186 | getClosestFramerateStandard, | |
187 | computeLowerResolutionsToTranscode, | |
188 | getVideoFileBitrate, | |
189 | canDoQuickTranscode, | |
190 | canDoQuickVideoTranscode, | |
191 | canDoQuickAudioTranscode | |
192 | } |