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1 | import { Job } from 'bull' | |
2 | import ffmpeg, { FfmpegCommand, FilterSpecification, getAvailableEncoders } from 'fluent-ffmpeg' | |
3 | import { readFile, remove, writeFile } from 'fs-extra' | |
4 | import { dirname, join } from 'path' | |
5 | import { FFMPEG_NICE, VIDEO_LIVE } from '@server/initializers/constants' | |
6 | import { pick } from '@shared/core-utils' | |
7 | import { | |
8 | AvailableEncoders, | |
9 | EncoderOptions, | |
10 | EncoderOptionsBuilder, | |
11 | EncoderOptionsBuilderParams, | |
12 | EncoderProfile, | |
13 | VideoResolution | |
14 | } from '../../shared/models/videos' | |
15 | import { CONFIG } from '../initializers/config' | |
16 | import { execPromise, promisify0 } from './core-utils' | |
17 | import { computeFPS, ffprobePromise, getAudioStream, getVideoFileBitrate, getVideoFileFPS, getVideoFileResolution } from './ffprobe-utils' | |
18 | import { processImage } from './image-utils' | |
19 | import { logger } from './logger' | |
20 | ||
21 | /** | |
22 | * | |
23 | * Functions that run transcoding/muxing ffmpeg processes | |
24 | * Mainly called by lib/video-transcoding.ts and lib/live-manager.ts | |
25 | * | |
26 | */ | |
27 | ||
28 | // --------------------------------------------------------------------------- | |
29 | // Encoder options | |
30 | // --------------------------------------------------------------------------- | |
31 | ||
32 | type StreamType = 'audio' | 'video' | |
33 | ||
34 | // --------------------------------------------------------------------------- | |
35 | // Encoders support | |
36 | // --------------------------------------------------------------------------- | |
37 | ||
38 | // Detect supported encoders by ffmpeg | |
39 | let supportedEncoders: Map<string, boolean> | |
40 | async function checkFFmpegEncoders (peertubeAvailableEncoders: AvailableEncoders): Promise<Map<string, boolean>> { | |
41 | if (supportedEncoders !== undefined) { | |
42 | return supportedEncoders | |
43 | } | |
44 | ||
45 | const getAvailableEncodersPromise = promisify0(getAvailableEncoders) | |
46 | const availableFFmpegEncoders = await getAvailableEncodersPromise() | |
47 | ||
48 | const searchEncoders = new Set<string>() | |
49 | for (const type of [ 'live', 'vod' ]) { | |
50 | for (const streamType of [ 'audio', 'video' ]) { | |
51 | for (const encoder of peertubeAvailableEncoders.encodersToTry[type][streamType]) { | |
52 | searchEncoders.add(encoder) | |
53 | } | |
54 | } | |
55 | } | |
56 | ||
57 | supportedEncoders = new Map<string, boolean>() | |
58 | ||
59 | for (const searchEncoder of searchEncoders) { | |
60 | supportedEncoders.set(searchEncoder, availableFFmpegEncoders[searchEncoder] !== undefined) | |
61 | } | |
62 | ||
63 | logger.info('Built supported ffmpeg encoders.', { supportedEncoders, searchEncoders }) | |
64 | ||
65 | return supportedEncoders | |
66 | } | |
67 | ||
68 | function resetSupportedEncoders () { | |
69 | supportedEncoders = undefined | |
70 | } | |
71 | ||
72 | // --------------------------------------------------------------------------- | |
73 | // Image manipulation | |
74 | // --------------------------------------------------------------------------- | |
75 | ||
76 | function convertWebPToJPG (path: string, destination: string): Promise<void> { | |
77 | const command = ffmpeg(path, { niceness: FFMPEG_NICE.THUMBNAIL }) | |
78 | .output(destination) | |
79 | ||
80 | return runCommand({ command, silent: true }) | |
81 | } | |
82 | ||
83 | function processGIF ( | |
84 | path: string, | |
85 | destination: string, | |
86 | newSize: { width: number, height: number } | |
87 | ): Promise<void> { | |
88 | const command = ffmpeg(path, { niceness: FFMPEG_NICE.THUMBNAIL }) | |
89 | .fps(20) | |
90 | .size(`${newSize.width}x${newSize.height}`) | |
91 | .output(destination) | |
92 | ||
93 | return runCommand({ command }) | |
94 | } | |
95 | ||
96 | async function generateImageFromVideoFile (fromPath: string, folder: string, imageName: string, size: { width: number, height: number }) { | |
97 | const pendingImageName = 'pending-' + imageName | |
98 | ||
99 | const options = { | |
100 | filename: pendingImageName, | |
101 | count: 1, | |
102 | folder | |
103 | } | |
104 | ||
105 | const pendingImagePath = join(folder, pendingImageName) | |
106 | ||
107 | try { | |
108 | await new Promise<string>((res, rej) => { | |
109 | ffmpeg(fromPath, { niceness: FFMPEG_NICE.THUMBNAIL }) | |
110 | .on('error', rej) | |
111 | .on('end', () => res(imageName)) | |
112 | .thumbnail(options) | |
113 | }) | |
114 | ||
115 | const destination = join(folder, imageName) | |
116 | await processImage(pendingImagePath, destination, size) | |
117 | } catch (err) { | |
118 | logger.error('Cannot generate image from video %s.', fromPath, { err }) | |
119 | ||
120 | try { | |
121 | await remove(pendingImagePath) | |
122 | } catch (err) { | |
123 | logger.debug('Cannot remove pending image path after generation error.', { err }) | |
124 | } | |
125 | } | |
126 | } | |
127 | ||
128 | // --------------------------------------------------------------------------- | |
129 | // Transcode meta function | |
130 | // --------------------------------------------------------------------------- | |
131 | ||
132 | type TranscodeOptionsType = 'hls' | 'hls-from-ts' | 'quick-transcode' | 'video' | 'merge-audio' | 'only-audio' | |
133 | ||
134 | interface BaseTranscodeOptions { | |
135 | type: TranscodeOptionsType | |
136 | ||
137 | inputPath: string | |
138 | outputPath: string | |
139 | ||
140 | availableEncoders: AvailableEncoders | |
141 | profile: string | |
142 | ||
143 | resolution: number | |
144 | ||
145 | isPortraitMode?: boolean | |
146 | ||
147 | job?: Job | |
148 | } | |
149 | ||
150 | interface HLSTranscodeOptions extends BaseTranscodeOptions { | |
151 | type: 'hls' | |
152 | copyCodecs: boolean | |
153 | hlsPlaylist: { | |
154 | videoFilename: string | |
155 | } | |
156 | } | |
157 | ||
158 | interface HLSFromTSTranscodeOptions extends BaseTranscodeOptions { | |
159 | type: 'hls-from-ts' | |
160 | ||
161 | isAAC: boolean | |
162 | ||
163 | hlsPlaylist: { | |
164 | videoFilename: string | |
165 | } | |
166 | } | |
167 | ||
168 | interface QuickTranscodeOptions extends BaseTranscodeOptions { | |
169 | type: 'quick-transcode' | |
170 | } | |
171 | ||
172 | interface VideoTranscodeOptions extends BaseTranscodeOptions { | |
173 | type: 'video' | |
174 | } | |
175 | ||
176 | interface MergeAudioTranscodeOptions extends BaseTranscodeOptions { | |
177 | type: 'merge-audio' | |
178 | audioPath: string | |
179 | } | |
180 | ||
181 | interface OnlyAudioTranscodeOptions extends BaseTranscodeOptions { | |
182 | type: 'only-audio' | |
183 | } | |
184 | ||
185 | type TranscodeOptions = | |
186 | HLSTranscodeOptions | |
187 | | HLSFromTSTranscodeOptions | |
188 | | VideoTranscodeOptions | |
189 | | MergeAudioTranscodeOptions | |
190 | | OnlyAudioTranscodeOptions | |
191 | | QuickTranscodeOptions | |
192 | ||
193 | const builders: { | |
194 | [ type in TranscodeOptionsType ]: (c: FfmpegCommand, o?: TranscodeOptions) => Promise<FfmpegCommand> | FfmpegCommand | |
195 | } = { | |
196 | 'quick-transcode': buildQuickTranscodeCommand, | |
197 | 'hls': buildHLSVODCommand, | |
198 | 'hls-from-ts': buildHLSVODFromTSCommand, | |
199 | 'merge-audio': buildAudioMergeCommand, | |
200 | 'only-audio': buildOnlyAudioCommand, | |
201 | 'video': buildx264VODCommand | |
202 | } | |
203 | ||
204 | async function transcode (options: TranscodeOptions) { | |
205 | logger.debug('Will run transcode.', { options }) | |
206 | ||
207 | let command = getFFmpeg(options.inputPath, 'vod') | |
208 | .output(options.outputPath) | |
209 | ||
210 | command = await builders[options.type](command, options) | |
211 | ||
212 | await runCommand({ command, job: options.job }) | |
213 | ||
214 | await fixHLSPlaylistIfNeeded(options) | |
215 | } | |
216 | ||
217 | // --------------------------------------------------------------------------- | |
218 | // Live muxing/transcoding functions | |
219 | // --------------------------------------------------------------------------- | |
220 | ||
221 | async function getLiveTranscodingCommand (options: { | |
222 | rtmpUrl: string | |
223 | ||
224 | outPath: string | |
225 | masterPlaylistName: string | |
226 | ||
227 | resolutions: number[] | |
228 | ||
229 | // Input information | |
230 | fps: number | |
231 | bitrate: number | |
232 | ratio: number | |
233 | ||
234 | availableEncoders: AvailableEncoders | |
235 | profile: string | |
236 | }) { | |
237 | const { rtmpUrl, outPath, resolutions, fps, bitrate, availableEncoders, profile, masterPlaylistName, ratio } = options | |
238 | const input = rtmpUrl | |
239 | ||
240 | const command = getFFmpeg(input, 'live') | |
241 | ||
242 | const varStreamMap: string[] = [] | |
243 | ||
244 | const complexFilter: FilterSpecification[] = [ | |
245 | { | |
246 | inputs: '[v:0]', | |
247 | filter: 'split', | |
248 | options: resolutions.length, | |
249 | outputs: resolutions.map(r => `vtemp${r}`) | |
250 | } | |
251 | ] | |
252 | ||
253 | command.outputOption('-sc_threshold 0') | |
254 | ||
255 | addDefaultEncoderGlobalParams({ command }) | |
256 | ||
257 | for (let i = 0; i < resolutions.length; i++) { | |
258 | const resolution = resolutions[i] | |
259 | const resolutionFPS = computeFPS(fps, resolution) | |
260 | ||
261 | const baseEncoderBuilderParams = { | |
262 | input, | |
263 | ||
264 | availableEncoders, | |
265 | profile, | |
266 | ||
267 | inputBitrate: bitrate, | |
268 | inputRatio: ratio, | |
269 | ||
270 | resolution, | |
271 | fps: resolutionFPS, | |
272 | ||
273 | streamNum: i, | |
274 | videoType: 'live' as 'live' | |
275 | } | |
276 | ||
277 | { | |
278 | const streamType: StreamType = 'video' | |
279 | const builderResult = await getEncoderBuilderResult({ ...baseEncoderBuilderParams, streamType }) | |
280 | if (!builderResult) { | |
281 | throw new Error('No available live video encoder found') | |
282 | } | |
283 | ||
284 | command.outputOption(`-map [vout${resolution}]`) | |
285 | ||
286 | addDefaultEncoderParams({ command, encoder: builderResult.encoder, fps: resolutionFPS, streamNum: i }) | |
287 | ||
288 | logger.debug('Apply ffmpeg live video params from %s using %s profile.', builderResult.encoder, profile, builderResult) | |
289 | ||
290 | command.outputOption(`${buildStreamSuffix('-c:v', i)} ${builderResult.encoder}`) | |
291 | applyEncoderOptions(command, builderResult.result) | |
292 | ||
293 | complexFilter.push({ | |
294 | inputs: `vtemp${resolution}`, | |
295 | filter: getScaleFilter(builderResult.result), | |
296 | options: `w=-2:h=${resolution}`, | |
297 | outputs: `vout${resolution}` | |
298 | }) | |
299 | } | |
300 | ||
301 | { | |
302 | const streamType: StreamType = 'audio' | |
303 | const builderResult = await getEncoderBuilderResult({ ...baseEncoderBuilderParams, streamType }) | |
304 | if (!builderResult) { | |
305 | throw new Error('No available live audio encoder found') | |
306 | } | |
307 | ||
308 | command.outputOption('-map a:0') | |
309 | ||
310 | addDefaultEncoderParams({ command, encoder: builderResult.encoder, fps: resolutionFPS, streamNum: i }) | |
311 | ||
312 | logger.debug('Apply ffmpeg live audio params from %s using %s profile.', builderResult.encoder, profile, builderResult) | |
313 | ||
314 | command.outputOption(`${buildStreamSuffix('-c:a', i)} ${builderResult.encoder}`) | |
315 | applyEncoderOptions(command, builderResult.result) | |
316 | } | |
317 | ||
318 | varStreamMap.push(`v:${i},a:${i}`) | |
319 | } | |
320 | ||
321 | command.complexFilter(complexFilter) | |
322 | ||
323 | addDefaultLiveHLSParams(command, outPath, masterPlaylistName) | |
324 | ||
325 | command.outputOption('-var_stream_map', varStreamMap.join(' ')) | |
326 | ||
327 | return command | |
328 | } | |
329 | ||
330 | function getLiveMuxingCommand (rtmpUrl: string, outPath: string, masterPlaylistName: string) { | |
331 | const command = getFFmpeg(rtmpUrl, 'live') | |
332 | ||
333 | command.outputOption('-c:v copy') | |
334 | command.outputOption('-c:a copy') | |
335 | command.outputOption('-map 0:a?') | |
336 | command.outputOption('-map 0:v?') | |
337 | ||
338 | addDefaultLiveHLSParams(command, outPath, masterPlaylistName) | |
339 | ||
340 | return command | |
341 | } | |
342 | ||
343 | function buildStreamSuffix (base: string, streamNum?: number) { | |
344 | if (streamNum !== undefined) { | |
345 | return `${base}:${streamNum}` | |
346 | } | |
347 | ||
348 | return base | |
349 | } | |
350 | ||
351 | // --------------------------------------------------------------------------- | |
352 | // Default options | |
353 | // --------------------------------------------------------------------------- | |
354 | ||
355 | function addDefaultEncoderGlobalParams (options: { | |
356 | command: FfmpegCommand | |
357 | }) { | |
358 | const { command } = options | |
359 | ||
360 | // avoid issues when transcoding some files: https://trac.ffmpeg.org/ticket/6375 | |
361 | command.outputOption('-max_muxing_queue_size 1024') | |
362 | // strip all metadata | |
363 | .outputOption('-map_metadata -1') | |
364 | // NOTE: b-strategy 1 - heuristic algorithm, 16 is optimal B-frames for it | |
365 | .outputOption('-b_strategy 1') | |
366 | // NOTE: Why 16: https://github.com/Chocobozzz/PeerTube/pull/774. b-strategy 2 -> B-frames<16 | |
367 | .outputOption('-bf 16') | |
368 | // allows import of source material with incompatible pixel formats (e.g. MJPEG video) | |
369 | .outputOption('-pix_fmt yuv420p') | |
370 | } | |
371 | ||
372 | function addDefaultEncoderParams (options: { | |
373 | command: FfmpegCommand | |
374 | encoder: 'libx264' | string | |
375 | streamNum?: number | |
376 | fps?: number | |
377 | }) { | |
378 | const { command, encoder, fps, streamNum } = options | |
379 | ||
380 | if (encoder === 'libx264') { | |
381 | // 3.1 is the minimal resource allocation for our highest supported resolution | |
382 | command.outputOption(buildStreamSuffix('-level:v', streamNum) + ' 3.1') | |
383 | ||
384 | if (fps) { | |
385 | // Keyframe interval of 2 seconds for faster seeking and resolution switching. | |
386 | // https://streaminglearningcenter.com/blogs/whats-the-right-keyframe-interval.html | |
387 | // https://superuser.com/a/908325 | |
388 | command.outputOption(buildStreamSuffix('-g:v', streamNum) + ' ' + (fps * 2)) | |
389 | } | |
390 | } | |
391 | } | |
392 | ||
393 | function addDefaultLiveHLSParams (command: FfmpegCommand, outPath: string, masterPlaylistName: string) { | |
394 | command.outputOption('-hls_time ' + VIDEO_LIVE.SEGMENT_TIME_SECONDS) | |
395 | command.outputOption('-hls_list_size ' + VIDEO_LIVE.SEGMENTS_LIST_SIZE) | |
396 | command.outputOption('-hls_flags delete_segments+independent_segments') | |
397 | command.outputOption(`-hls_segment_filename ${join(outPath, '%v-%06d.ts')}`) | |
398 | command.outputOption('-master_pl_name ' + masterPlaylistName) | |
399 | command.outputOption(`-f hls`) | |
400 | ||
401 | command.output(join(outPath, '%v.m3u8')) | |
402 | } | |
403 | ||
404 | // --------------------------------------------------------------------------- | |
405 | // Transcode VOD command builders | |
406 | // --------------------------------------------------------------------------- | |
407 | ||
408 | async function buildx264VODCommand (command: FfmpegCommand, options: TranscodeOptions) { | |
409 | let fps = await getVideoFileFPS(options.inputPath) | |
410 | fps = computeFPS(fps, options.resolution) | |
411 | ||
412 | let scaleFilterValue: string | |
413 | ||
414 | if (options.resolution !== undefined) { | |
415 | scaleFilterValue = options.isPortraitMode === true | |
416 | ? `w=${options.resolution}:h=-2` | |
417 | : `w=-2:h=${options.resolution}` | |
418 | } | |
419 | ||
420 | command = await presetVideo({ command, input: options.inputPath, transcodeOptions: options, fps, scaleFilterValue }) | |
421 | ||
422 | return command | |
423 | } | |
424 | ||
425 | async function buildAudioMergeCommand (command: FfmpegCommand, options: MergeAudioTranscodeOptions) { | |
426 | command = command.loop(undefined) | |
427 | ||
428 | const scaleFilterValue = getScaleCleanerValue() | |
429 | command = await presetVideo({ command, input: options.audioPath, transcodeOptions: options, scaleFilterValue }) | |
430 | ||
431 | command.outputOption('-preset:v veryfast') | |
432 | ||
433 | command = command.input(options.audioPath) | |
434 | .outputOption('-tune stillimage') | |
435 | .outputOption('-shortest') | |
436 | ||
437 | return command | |
438 | } | |
439 | ||
440 | function buildOnlyAudioCommand (command: FfmpegCommand, _options: OnlyAudioTranscodeOptions) { | |
441 | command = presetOnlyAudio(command) | |
442 | ||
443 | return command | |
444 | } | |
445 | ||
446 | function buildQuickTranscodeCommand (command: FfmpegCommand) { | |
447 | command = presetCopy(command) | |
448 | ||
449 | command = command.outputOption('-map_metadata -1') // strip all metadata | |
450 | .outputOption('-movflags faststart') | |
451 | ||
452 | return command | |
453 | } | |
454 | ||
455 | function addCommonHLSVODCommandOptions (command: FfmpegCommand, outputPath: string) { | |
456 | return command.outputOption('-hls_time 4') | |
457 | .outputOption('-hls_list_size 0') | |
458 | .outputOption('-hls_playlist_type vod') | |
459 | .outputOption('-hls_segment_filename ' + outputPath) | |
460 | .outputOption('-hls_segment_type fmp4') | |
461 | .outputOption('-f hls') | |
462 | .outputOption('-hls_flags single_file') | |
463 | } | |
464 | ||
465 | async function buildHLSVODCommand (command: FfmpegCommand, options: HLSTranscodeOptions) { | |
466 | const videoPath = getHLSVideoPath(options) | |
467 | ||
468 | if (options.copyCodecs) command = presetCopy(command) | |
469 | else if (options.resolution === VideoResolution.H_NOVIDEO) command = presetOnlyAudio(command) | |
470 | else command = await buildx264VODCommand(command, options) | |
471 | ||
472 | addCommonHLSVODCommandOptions(command, videoPath) | |
473 | ||
474 | return command | |
475 | } | |
476 | ||
477 | function buildHLSVODFromTSCommand (command: FfmpegCommand, options: HLSFromTSTranscodeOptions) { | |
478 | const videoPath = getHLSVideoPath(options) | |
479 | ||
480 | command.outputOption('-c copy') | |
481 | ||
482 | if (options.isAAC) { | |
483 | // Required for example when copying an AAC stream from an MPEG-TS | |
484 | // Since it's a bitstream filter, we don't need to reencode the audio | |
485 | command.outputOption('-bsf:a aac_adtstoasc') | |
486 | } | |
487 | ||
488 | addCommonHLSVODCommandOptions(command, videoPath) | |
489 | ||
490 | return command | |
491 | } | |
492 | ||
493 | async function fixHLSPlaylistIfNeeded (options: TranscodeOptions) { | |
494 | if (options.type !== 'hls' && options.type !== 'hls-from-ts') return | |
495 | ||
496 | const fileContent = await readFile(options.outputPath) | |
497 | ||
498 | const videoFileName = options.hlsPlaylist.videoFilename | |
499 | const videoFilePath = getHLSVideoPath(options) | |
500 | ||
501 | // Fix wrong mapping with some ffmpeg versions | |
502 | const newContent = fileContent.toString() | |
503 | .replace(`#EXT-X-MAP:URI="${videoFilePath}",`, `#EXT-X-MAP:URI="${videoFileName}",`) | |
504 | ||
505 | await writeFile(options.outputPath, newContent) | |
506 | } | |
507 | ||
508 | function getHLSVideoPath (options: HLSTranscodeOptions | HLSFromTSTranscodeOptions) { | |
509 | return `${dirname(options.outputPath)}/${options.hlsPlaylist.videoFilename}` | |
510 | } | |
511 | ||
512 | // --------------------------------------------------------------------------- | |
513 | // Transcoding presets | |
514 | // --------------------------------------------------------------------------- | |
515 | ||
516 | // Run encoder builder depending on available encoders | |
517 | // Try encoders by priority: if the encoder is available, run the chosen profile or fallback to the default one | |
518 | // If the default one does not exist, check the next encoder | |
519 | async function getEncoderBuilderResult (options: EncoderOptionsBuilderParams & { | |
520 | streamType: 'video' | 'audio' | |
521 | input: string | |
522 | ||
523 | availableEncoders: AvailableEncoders | |
524 | profile: string | |
525 | ||
526 | videoType: 'vod' | 'live' | |
527 | }) { | |
528 | const { availableEncoders, profile, streamType, videoType } = options | |
529 | ||
530 | const encodersToTry = availableEncoders.encodersToTry[videoType][streamType] | |
531 | const encoders = availableEncoders.available[videoType] | |
532 | ||
533 | for (const encoder of encodersToTry) { | |
534 | if (!(await checkFFmpegEncoders(availableEncoders)).get(encoder)) { | |
535 | logger.debug('Encoder %s not available in ffmpeg, skipping.', encoder) | |
536 | continue | |
537 | } | |
538 | ||
539 | if (!encoders[encoder]) { | |
540 | logger.debug('Encoder %s not available in peertube encoders, skipping.', encoder) | |
541 | continue | |
542 | } | |
543 | ||
544 | // An object containing available profiles for this encoder | |
545 | const builderProfiles: EncoderProfile<EncoderOptionsBuilder> = encoders[encoder] | |
546 | let builder = builderProfiles[profile] | |
547 | ||
548 | if (!builder) { | |
549 | logger.debug('Profile %s for encoder %s not available. Fallback to default.', profile, encoder) | |
550 | builder = builderProfiles.default | |
551 | ||
552 | if (!builder) { | |
553 | logger.debug('Default profile for encoder %s not available. Try next available encoder.', encoder) | |
554 | continue | |
555 | } | |
556 | } | |
557 | ||
558 | const result = await builder(pick(options, [ 'input', 'resolution', 'inputBitrate', 'fps', 'inputRatio', 'streamNum' ])) | |
559 | ||
560 | return { | |
561 | result, | |
562 | ||
563 | // If we don't have output options, then copy the input stream | |
564 | encoder: result.copy === true | |
565 | ? 'copy' | |
566 | : encoder | |
567 | } | |
568 | } | |
569 | ||
570 | return null | |
571 | } | |
572 | ||
573 | async function presetVideo (options: { | |
574 | command: FfmpegCommand | |
575 | input: string | |
576 | transcodeOptions: TranscodeOptions | |
577 | fps?: number | |
578 | scaleFilterValue?: string | |
579 | }) { | |
580 | const { command, input, transcodeOptions, fps, scaleFilterValue } = options | |
581 | ||
582 | let localCommand = command | |
583 | .format('mp4') | |
584 | .outputOption('-movflags faststart') | |
585 | ||
586 | addDefaultEncoderGlobalParams({ command }) | |
587 | ||
588 | const probe = await ffprobePromise(input) | |
589 | ||
590 | // Audio encoder | |
591 | const parsedAudio = await getAudioStream(input, probe) | |
592 | const bitrate = await getVideoFileBitrate(input, probe) | |
593 | const { ratio } = await getVideoFileResolution(input, probe) | |
594 | ||
595 | let streamsToProcess: StreamType[] = [ 'audio', 'video' ] | |
596 | ||
597 | if (!parsedAudio.audioStream) { | |
598 | localCommand = localCommand.noAudio() | |
599 | streamsToProcess = [ 'video' ] | |
600 | } | |
601 | ||
602 | for (const streamType of streamsToProcess) { | |
603 | const { profile, resolution, availableEncoders } = transcodeOptions | |
604 | ||
605 | const builderResult = await getEncoderBuilderResult({ | |
606 | streamType, | |
607 | input, | |
608 | resolution, | |
609 | availableEncoders, | |
610 | profile, | |
611 | fps, | |
612 | inputBitrate: bitrate, | |
613 | inputRatio: ratio, | |
614 | videoType: 'vod' as 'vod' | |
615 | }) | |
616 | ||
617 | if (!builderResult) { | |
618 | throw new Error('No available encoder found for stream ' + streamType) | |
619 | } | |
620 | ||
621 | logger.debug( | |
622 | 'Apply ffmpeg params from %s for %s stream of input %s using %s profile.', | |
623 | builderResult.encoder, streamType, input, profile, builderResult | |
624 | ) | |
625 | ||
626 | if (streamType === 'video') { | |
627 | localCommand.videoCodec(builderResult.encoder) | |
628 | ||
629 | if (scaleFilterValue) { | |
630 | localCommand.outputOption(`-vf ${getScaleFilter(builderResult.result)}=${scaleFilterValue}`) | |
631 | } | |
632 | } else if (streamType === 'audio') { | |
633 | localCommand.audioCodec(builderResult.encoder) | |
634 | } | |
635 | ||
636 | applyEncoderOptions(localCommand, builderResult.result) | |
637 | addDefaultEncoderParams({ command: localCommand, encoder: builderResult.encoder, fps }) | |
638 | } | |
639 | ||
640 | return localCommand | |
641 | } | |
642 | ||
643 | function presetCopy (command: FfmpegCommand): FfmpegCommand { | |
644 | return command | |
645 | .format('mp4') | |
646 | .videoCodec('copy') | |
647 | .audioCodec('copy') | |
648 | } | |
649 | ||
650 | function presetOnlyAudio (command: FfmpegCommand): FfmpegCommand { | |
651 | return command | |
652 | .format('mp4') | |
653 | .audioCodec('copy') | |
654 | .noVideo() | |
655 | } | |
656 | ||
657 | function applyEncoderOptions (command: FfmpegCommand, options: EncoderOptions): FfmpegCommand { | |
658 | return command | |
659 | .inputOptions(options.inputOptions ?? []) | |
660 | .outputOptions(options.outputOptions ?? []) | |
661 | } | |
662 | ||
663 | function getScaleFilter (options: EncoderOptions): string { | |
664 | if (options.scaleFilter) return options.scaleFilter.name | |
665 | ||
666 | return 'scale' | |
667 | } | |
668 | ||
669 | // --------------------------------------------------------------------------- | |
670 | // Utils | |
671 | // --------------------------------------------------------------------------- | |
672 | ||
673 | function getFFmpeg (input: string, type: 'live' | 'vod') { | |
674 | // We set cwd explicitly because ffmpeg appears to create temporary files when trancoding which fails in read-only file systems | |
675 | const command = ffmpeg(input, { | |
676 | niceness: type === 'live' ? FFMPEG_NICE.LIVE : FFMPEG_NICE.VOD, | |
677 | cwd: CONFIG.STORAGE.TMP_DIR | |
678 | }) | |
679 | ||
680 | const threads = type === 'live' | |
681 | ? CONFIG.LIVE.TRANSCODING.THREADS | |
682 | : CONFIG.TRANSCODING.THREADS | |
683 | ||
684 | if (threads > 0) { | |
685 | // If we don't set any threads ffmpeg will chose automatically | |
686 | command.outputOption('-threads ' + threads) | |
687 | } | |
688 | ||
689 | return command | |
690 | } | |
691 | ||
692 | function getFFmpegVersion () { | |
693 | return new Promise<string>((res, rej) => { | |
694 | (ffmpeg() as any)._getFfmpegPath((err, ffmpegPath) => { | |
695 | if (err) return rej(err) | |
696 | if (!ffmpegPath) return rej(new Error('Could not find ffmpeg path')) | |
697 | ||
698 | return execPromise(`${ffmpegPath} -version`) | |
699 | .then(stdout => { | |
700 | const parsed = stdout.match(/ffmpeg version .?(\d+\.\d+(\.\d+)?)/) | |
701 | if (!parsed || !parsed[1]) return rej(new Error(`Could not find ffmpeg version in ${stdout}`)) | |
702 | ||
703 | // Fix ffmpeg version that does not include patch version (4.4 for example) | |
704 | let version = parsed[1] | |
705 | if (version.match(/^\d+\.\d+$/)) { | |
706 | version += '.0' | |
707 | } | |
708 | ||
709 | return res(version) | |
710 | }) | |
711 | .catch(err => rej(err)) | |
712 | }) | |
713 | }) | |
714 | } | |
715 | ||
716 | async function runCommand (options: { | |
717 | command: FfmpegCommand | |
718 | silent?: boolean // false | |
719 | job?: Job | |
720 | }) { | |
721 | const { command, silent = false, job } = options | |
722 | ||
723 | return new Promise<void>((res, rej) => { | |
724 | let shellCommand: string | |
725 | ||
726 | command.on('start', cmdline => { shellCommand = cmdline }) | |
727 | ||
728 | command.on('error', (err, stdout, stderr) => { | |
729 | if (silent !== true) logger.error('Error in ffmpeg.', { stdout, stderr }) | |
730 | ||
731 | rej(err) | |
732 | }) | |
733 | ||
734 | command.on('end', (stdout, stderr) => { | |
735 | logger.debug('FFmpeg command ended.', { stdout, stderr, shellCommand }) | |
736 | ||
737 | res() | |
738 | }) | |
739 | ||
740 | if (job) { | |
741 | command.on('progress', progress => { | |
742 | if (!progress.percent) return | |
743 | ||
744 | job.progress(Math.round(progress.percent)) | |
745 | .catch(err => logger.warn('Cannot set ffmpeg job progress.', { err })) | |
746 | }) | |
747 | } | |
748 | ||
749 | command.run() | |
750 | }) | |
751 | } | |
752 | ||
753 | // Avoid "height not divisible by 2" error | |
754 | function getScaleCleanerValue () { | |
755 | return 'trunc(iw/2)*2:trunc(ih/2)*2' | |
756 | } | |
757 | ||
758 | // --------------------------------------------------------------------------- | |
759 | ||
760 | export { | |
761 | getLiveTranscodingCommand, | |
762 | getLiveMuxingCommand, | |
763 | buildStreamSuffix, | |
764 | convertWebPToJPG, | |
765 | processGIF, | |
766 | generateImageFromVideoFile, | |
767 | TranscodeOptions, | |
768 | TranscodeOptionsType, | |
769 | transcode, | |
770 | runCommand, | |
771 | getFFmpegVersion, | |
772 | ||
773 | resetSupportedEncoders, | |
774 | ||
775 | // builders | |
776 | buildx264VODCommand | |
777 | } |