From c6c0fa6cd8fe8f752463d8982c3dbcd448739c4e Mon Sep 17 00:00:00 2001 From: Chocobozzz Date: Thu, 17 Sep 2020 09:20:52 +0200 Subject: Live streaming implementation first step --- server/helpers/core-utils.ts | 11 +++ server/helpers/custom-validators/videos.ts | 5 +- server/helpers/ffmpeg-utils.ts | 138 ++++++++++++++++++++++++----- 3 files changed, 132 insertions(+), 22 deletions(-) (limited to 'server/helpers') diff --git a/server/helpers/core-utils.ts b/server/helpers/core-utils.ts index b1f5d9610..49eee7c59 100644 --- a/server/helpers/core-utils.ts +++ b/server/helpers/core-utils.ts @@ -175,6 +175,16 @@ function pageToStartAndCount (page: number, itemsPerPage: number) { return { start, count: itemsPerPage } } +function mapToJSON (map: Map) { + const obj: any = {} + + for (const [ k, v ] of map) { + obj[k] = v + } + + return obj +} + function buildPath (path: string) { if (isAbsolute(path)) return path @@ -263,6 +273,7 @@ export { sha256, sha1, + mapToJSON, promisify0, promisify1, diff --git a/server/helpers/custom-validators/videos.ts b/server/helpers/custom-validators/videos.ts index 40fecc09b..e99992236 100644 --- a/server/helpers/custom-validators/videos.ts +++ b/server/helpers/custom-validators/videos.ts @@ -8,7 +8,8 @@ import { VIDEO_LICENCES, VIDEO_PRIVACIES, VIDEO_RATE_TYPES, - VIDEO_STATES + VIDEO_STATES, + VIDEO_LIVE } from '../../initializers/constants' import { exists, isArray, isDateValid, isFileValid } from './misc' import * as magnetUtil from 'magnet-uri' @@ -77,7 +78,7 @@ function isVideoRatingTypeValid (value: string) { } function isVideoFileExtnameValid (value: string) { - return exists(value) && MIMETYPES.VIDEO.EXT_MIMETYPE[value] !== undefined + return exists(value) && (value === VIDEO_LIVE.EXTENSION || MIMETYPES.VIDEO.EXT_MIMETYPE[value] !== undefined) } function isVideoFile (files: { [ fieldname: string ]: Express.Multer.File[] } | Express.Multer.File[]) { diff --git a/server/helpers/ffmpeg-utils.ts b/server/helpers/ffmpeg-utils.ts index 02c66cd01..fac2595f1 100644 --- a/server/helpers/ffmpeg-utils.ts +++ b/server/helpers/ffmpeg-utils.ts @@ -1,13 +1,13 @@ import * as ffmpeg from 'fluent-ffmpeg' +import { readFile, remove, writeFile } from 'fs-extra' import { dirname, join } from 'path' +import { VideoFileMetadata } from '@shared/models/videos/video-file-metadata' import { getMaxBitrate, getTargetBitrate, VideoResolution } from '../../shared/models/videos' +import { checkFFmpegEncoders } from '../initializers/checker-before-init' +import { CONFIG } from '../initializers/config' import { FFMPEG_NICE, VIDEO_TRANSCODING_FPS } from '../initializers/constants' import { processImage } from './image-utils' import { logger } from './logger' -import { checkFFmpegEncoders } from '../initializers/checker-before-init' -import { readFile, remove, writeFile } from 'fs-extra' -import { CONFIG } from '../initializers/config' -import { VideoFileMetadata } from '@shared/models/videos/video-file-metadata' /** * A toolbox to play with audio @@ -74,9 +74,12 @@ namespace audio { } } -function computeResolutionsToTranscode (videoFileResolution: number) { +function computeResolutionsToTranscode (videoFileResolution: number, type: 'vod' | 'live') { + const configResolutions = type === 'vod' + ? CONFIG.TRANSCODING.RESOLUTIONS + : CONFIG.LIVE.TRANSCODING.RESOLUTIONS + const resolutionsEnabled: number[] = [] - const configResolutions = CONFIG.TRANSCODING.RESOLUTIONS // Put in the order we want to proceed jobs const resolutions = [ @@ -270,14 +273,13 @@ type TranscodeOptions = function transcode (options: TranscodeOptions) { return new Promise(async (res, rej) => { try { - // we set cwd explicitly because ffmpeg appears to create temporary files when trancoding which fails in read-only file systems - let command = ffmpeg(options.inputPath, { niceness: FFMPEG_NICE.TRANSCODING, cwd: CONFIG.STORAGE.TMP_DIR }) + let command = getFFmpeg(options.inputPath) .output(options.outputPath) if (options.type === 'quick-transcode') { command = buildQuickTranscodeCommand(command) } else if (options.type === 'hls') { - command = await buildHLSCommand(command, options) + command = await buildHLSVODCommand(command, options) } else if (options.type === 'merge-audio') { command = await buildAudioMergeCommand(command, options) } else if (options.type === 'only-audio') { @@ -286,11 +288,6 @@ function transcode (options: TranscodeOptions) { command = await buildx264Command(command, options) } - if (CONFIG.TRANSCODING.THREADS > 0) { - // if we don't set any threads ffmpeg will chose automatically - command = command.outputOption('-threads ' + CONFIG.TRANSCODING.THREADS) - } - command .on('error', (err, stdout, stderr) => { logger.error('Error in transcoding job.', { stdout, stderr }) @@ -356,16 +353,89 @@ function convertWebPToJPG (path: string, destination: string): Promise { }) } +function runLiveTranscoding (rtmpUrl: string, outPath: string, resolutions: number[]) { + const command = getFFmpeg(rtmpUrl) + command.inputOption('-fflags nobuffer') + + const varStreamMap: string[] = [] + + command.complexFilter([ + { + inputs: '[v:0]', + filter: 'split', + options: resolutions.length, + outputs: resolutions.map(r => `vtemp${r}`) + }, + + ...resolutions.map(r => ({ + inputs: `vtemp${r}`, + filter: 'scale', + options: `w=-2:h=${r}`, + outputs: `vout${r}` + })) + ]) + + const liveFPS = VIDEO_TRANSCODING_FPS.AVERAGE + + command.withFps(liveFPS) + + command.outputOption('-b_strategy 1') + command.outputOption('-bf 16') + command.outputOption('-preset superfast') + command.outputOption('-level 3.1') + command.outputOption('-map_metadata -1') + command.outputOption('-pix_fmt yuv420p') + + for (let i = 0; i < resolutions.length; i++) { + const resolution = resolutions[i] + + command.outputOption(`-map [vout${resolution}]`) + command.outputOption(`-c:v:${i} libx264`) + command.outputOption(`-b:v:${i} ${getTargetBitrate(resolution, liveFPS, VIDEO_TRANSCODING_FPS)}`) + + command.outputOption(`-map a:0`) + command.outputOption(`-c:a:${i} aac`) + + varStreamMap.push(`v:${i},a:${i}`) + } + + addDefaultLiveHLSParams(command, outPath) + + command.outputOption('-var_stream_map', varStreamMap.join(' ')) + + command.run() + + return command +} + +function runLiveMuxing (rtmpUrl: string, outPath: string) { + const command = getFFmpeg(rtmpUrl) + command.inputOption('-fflags nobuffer') + + command.outputOption('-c:v copy') + command.outputOption('-c:a copy') + command.outputOption('-map 0:a?') + command.outputOption('-map 0:v?') + + addDefaultLiveHLSParams(command, outPath) + + command.run() + + return command +} + // --------------------------------------------------------------------------- export { getVideoStreamCodec, getAudioStreamCodec, + runLiveMuxing, convertWebPToJPG, getVideoStreamSize, getVideoFileResolution, getMetadataFromFile, getDurationFromVideoFile, + runLiveTranscoding, generateImageFromVideoFile, TranscodeOptions, TranscodeOptionsType, @@ -379,6 +449,25 @@ export { // --------------------------------------------------------------------------- +function addDefaultX264Params (command: ffmpeg.FfmpegCommand) { + command.outputOption('-level 3.1') // 3.1 is the minimal resource allocation for our highest supported resolution + .outputOption('-b_strategy 1') // NOTE: b-strategy 1 - heuristic algorithm, 16 is optimal B-frames for it + .outputOption('-bf 16') // NOTE: Why 16: https://github.com/Chocobozzz/PeerTube/pull/774. b-strategy 2 -> B-frames<16 + .outputOption('-pix_fmt yuv420p') // allows import of source material with incompatible pixel formats (e.g. MJPEG video) + .outputOption('-map_metadata -1') // strip all metadata +} + +function addDefaultLiveHLSParams (command: ffmpeg.FfmpegCommand, outPath: string) { + command.outputOption('-hls_time 4') + command.outputOption('-hls_list_size 15') + command.outputOption('-hls_flags delete_segments') + command.outputOption(`-hls_segment_filename ${join(outPath, '%v-%d.ts')}`) + command.outputOption('-master_pl_name master.m3u8') + command.outputOption(`-f hls`) + + command.output(join(outPath, '%v.m3u8')) +} + async function buildx264Command (command: ffmpeg.FfmpegCommand, options: TranscodeOptions) { let fps = await getVideoFileFPS(options.inputPath) if ( @@ -438,7 +527,7 @@ function buildQuickTranscodeCommand (command: ffmpeg.FfmpegCommand) { return command } -async function buildHLSCommand (command: ffmpeg.FfmpegCommand, options: HLSTranscodeOptions) { +async function buildHLSVODCommand (command: ffmpeg.FfmpegCommand, options: HLSTranscodeOptions) { const videoPath = getHLSVideoPath(options) if (options.copyCodecs) command = presetCopy(command) @@ -508,13 +597,10 @@ async function presetH264 (command: ffmpeg.FfmpegCommand, input: string, resolut let localCommand = command .format('mp4') .videoCodec('libx264') - .outputOption('-level 3.1') // 3.1 is the minimal resource allocation for our highest supported resolution - .outputOption('-b_strategy 1') // NOTE: b-strategy 1 - heuristic algorithm, 16 is optimal B-frames for it - .outputOption('-bf 16') // NOTE: Why 16: https://github.com/Chocobozzz/PeerTube/pull/774. b-strategy 2 -> B-frames<16 - .outputOption('-pix_fmt yuv420p') // allows import of source material with incompatible pixel formats (e.g. MJPEG video) - .outputOption('-map_metadata -1') // strip all metadata .outputOption('-movflags faststart') + addDefaultX264Params(localCommand) + const parsedAudio = await audio.get(input) if (!parsedAudio.audioStream) { @@ -565,3 +651,15 @@ function presetOnlyAudio (command: ffmpeg.FfmpegCommand): ffmpeg.FfmpegCommand { .audioCodec('copy') .noVideo() } + +function getFFmpeg (input: string) { + // We set cwd explicitly because ffmpeg appears to create temporary files when trancoding which fails in read-only file systems + const command = ffmpeg(input, { niceness: FFMPEG_NICE.TRANSCODING, cwd: CONFIG.STORAGE.TMP_DIR }) + + if (CONFIG.TRANSCODING.THREADS > 0) { + // If we don't set any threads ffmpeg will chose automatically + command.outputOption('-threads ' + CONFIG.TRANSCODING.THREADS) + } + + return command +} -- cgit v1.2.3