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src/main.ts
284
src/main.ts
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import { PluginSettingsManager, PluginTranscodingManager } from "@peertube/peertube-types"
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import { EncoderOptions, EncoderOptionsBuilderParams, RegisterServerOptions, VideoResolution } from "@peertube/peertube-types"
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import { Logger } from 'winston'
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let logger : Logger
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let transcodingManager : PluginTranscodingManager
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const DEFAULT_HARDWARE_DECODE : boolean = false
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const DEFAULT_VOD_QUALITY : string = 'p7'
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const DEFAULT_LIVE_QUALITY : string = 'hq'
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const DEFAULT_BITRATES : Map<VideoResolution, number> = new Map([
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[VideoResolution.H_NOVIDEO, 64 * 1000],
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[VideoResolution.H_144P, 320 * 1000],
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[VideoResolution.H_360P, 780 * 1000],
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[VideoResolution.H_480P, 1500 * 1000],
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[VideoResolution.H_720P, 2800 * 1000],
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[VideoResolution.H_1080P, 5200 * 1000],
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[VideoResolution.H_1440P, 10_000 * 1000],
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[VideoResolution.H_4K, 22_000 * 1000]
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])
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interface PluginSettings {
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hardwareDecode : boolean
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vodQuality: string
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liveQuality: string
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baseBitrate: Map<VideoResolution, number>
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}
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let pluginSettings : PluginSettings = {
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hardwareDecode: DEFAULT_HARDWARE_DECODE,
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vodQuality: DEFAULT_VOD_QUALITY,
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liveQuality: DEFAULT_LIVE_QUALITY,
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baseBitrate: new Map(DEFAULT_BITRATES)
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}
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let latestStreamNum = 9999
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export async function register({settingsManager, peertubeHelpers, transcodingManager: transcode, registerSetting} :RegisterServerOptions) {
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logger = peertubeHelpers.logger
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transcodingManager = transcode
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logger.info("Registering peertube-plugin-nctv-nvenc-transcode");
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const encoder = 'h264_nvenc'
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const profileName = 'nctv-nvenc-v2'
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// Add trasncoding profiles
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transcodingManager.addVODProfile(encoder, profileName, vodBuilder)
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transcodingManager.addVODEncoderPriority('video', encoder, 1000)
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transcodingManager.addLiveProfile(encoder, profileName, liveBuilder)
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transcodingManager.addLiveEncoderPriority('video', encoder, 1000)
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// Load existing settings and default to constants if not present
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await loadSettings(settingsManager)
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registerSetting({
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name: 'hardware-decode',
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label: 'Hardware Decode',
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type: 'input-checkbox',
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descriptionHTML: 'Use hardware video decoder instead of software decoder. This will slightly improve performance but may cause some issues with some videos. If you encounter issues, disable this option and restart failed jobs.',
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default: DEFAULT_HARDWARE_DECODE,
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private: false
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})
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registerSetting({
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name: 'vod-quality',
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label: 'VOD Quality',
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type: 'select',
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options: [
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{ label: 'fastest', value: 'p1' },
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{ label: 'faster', value: 'p2' },
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{ label: 'fast', value: 'p3' },
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{ label: 'medium (default)', value: 'p4' },
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{ label: 'slow', value: 'p5' },
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{ label: 'slower', value: 'p6' },
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{ label: 'slowest', value: 'p7' }
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],
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descriptionHTML: 'This parameter controls the speed / quality tradeoff. Slower speed mean better quality. Faster speed mean lower quality. This setting is hardware dependent, you may need to experiment to find the best value for your hardware.',
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default: DEFAULT_VOD_QUALITY.toString(),
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private: false
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})
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registerSetting({
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name: 'live-quality',
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label: 'Live Quality',
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type: 'select',
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options: [
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{ label: 'low latency (default)', value: 'll' },
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{ label: 'low latency high quality', value: 'hq' },
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{ label: 'low latency high performance', value: 'ull' }
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],
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descriptionHTML: 'This parameter controls the speed / quality tradeoff. High performance mean lower quality.',
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default: DEFAULT_LIVE_QUALITY.toString(),
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private: false
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})
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registerSetting({
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name: 'base-bitrate-description',
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label: 'Base bitrate',
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type: 'html',
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html: '',
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descriptionHTML: `The base bitrate for video in bits. We take the min bitrate between the bitrate setting and video bitrate.<br/>This is the bitrate used when the video is transcoded at 30 FPS. The bitrate will be scaled linearly between this value and the maximum bitrate when the video is transcoded at 60 FPS. Wrong values are replaced by default values.`,
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private: true,
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})
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for (const [resolution, bitrate] of pluginSettings.baseBitrate) {
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logger.info("registering bitrate setting: "+ bitrate.toString())
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registerSetting({
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name: `base-bitrate-${resolution}`,
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label: `Base bitrate for ${printResolution(resolution)}`,
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type: 'input',
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default: DEFAULT_BITRATES.get(resolution)?.toString(),
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descriptionHTML: `Default value: ${DEFAULT_BITRATES.get(resolution)}`,
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private: false
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})
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}
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settingsManager.onSettingsChange(async (settings) => {
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loadSettings(settingsManager)
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})
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}
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export async function unregister() {
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logger.info("Unregistering peertube-plugin-nctv-nvenc-transcode")
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transcodingManager.removeAllProfilesAndEncoderPriorities()
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return true
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}
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async function loadSettings(settingsManager: PluginSettingsManager) {
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pluginSettings.hardwareDecode = await settingsManager.getSetting('hardware-decode') == "true"
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// pluginSettings.vodQuality = parseInt(await settingsManager.getSetting('vod-quality') as string) || DEFAULT_VOD_QUALITY
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pluginSettings.vodQuality = await settingsManager.getSetting('vod-quality') || DEFAULT_VOD_QUALITY
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// pluginSettings.liveQuality = parseInt(await settingsManager.getSetting('live-quality') as string) || DEFAULT_LIVE_QUALITY
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pluginSettings.liveQuality = await settingsManager.getSetting('live-quality') || DEFAULT_LIVE_QUALITY
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for (const [resolution, bitrate] of DEFAULT_BITRATES) {
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const key = `base-bitrate-${resolution}`
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const storedValue = await settingsManager.getSetting(key) as string
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pluginSettings.baseBitrate.set(resolution, parseInt(storedValue) || bitrate)
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logger.info(`Bitrate ${printResolution(resolution)}: ${pluginSettings.baseBitrate.get(resolution)}`)
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}
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logger.info(`Hardware decode: ${pluginSettings.hardwareDecode}`)
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logger.info(`VOD Quality: ${pluginSettings.vodQuality}`)
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logger.info(`Live Quality: ${pluginSettings.liveQuality}`)
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}
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function printResolution(resolution : VideoResolution) : string {
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switch (resolution) {
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case VideoResolution.H_NOVIDEO: return 'audio only'
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case VideoResolution.H_144P:
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case VideoResolution.H_360P:
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case VideoResolution.H_480P:
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case VideoResolution.H_720P:
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case VideoResolution.H_1080P:
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case VideoResolution.H_1440P:
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return `${resolution}p`
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case VideoResolution.H_4K: return '4K'
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default: return 'Unknown'
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}
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}
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function buildInitOptions() {
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if (pluginSettings.hardwareDecode) {
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return [
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'-hwaccel cuda',
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'-hwaccel_output_format cuda'
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]
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} else {
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return [
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'-hwaccel cuda'
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]
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}
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}
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async function vodBuilder(params: EncoderOptionsBuilderParams) : Promise<EncoderOptions> {
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const { resolution, fps, streamNum, inputBitrate } = params
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const streamSuffix = streamNum == undefined ? '' : `:${streamNum}`
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let targetBitrate = getTargetBitrate(resolution, fps)
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let shouldInitVaapi = (streamNum == undefined || streamNum <= latestStreamNum)
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if (targetBitrate > inputBitrate) {
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targetBitrate = inputBitrate
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}
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logger.info(`Building encoder options, received ${JSON.stringify(params)}`)
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if (shouldInitVaapi && streamNum != undefined) {
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latestStreamNum = streamNum
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}
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// You can also return a promise
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let options : EncoderOptions = {
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scaleFilter: {
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// software decode requires specifying pixel format for hardware filter and upload it to GPU
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// name: pluginSettings.hardwareDecode ? 'scale_vaapi' : 'format=nv12,hwupload,scale_vaapi'
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name: 'scale'
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},
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inputOptions: shouldInitVaapi ? buildInitOptions() : [],
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outputOptions: [
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`-preset ${pluginSettings.vodQuality}`,
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`-b:v${streamSuffix} ${targetBitrate}`,
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`-bufsize ${targetBitrate * 2}`
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]
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}
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logger.info(`EncoderOptions: ${JSON.stringify(options)}`)
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return options
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}
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async function liveBuilder(params: EncoderOptionsBuilderParams) : Promise<EncoderOptions> {
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const { resolution, fps, streamNum, inputBitrate } = params
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const streamSuffix = streamNum == undefined ? '' : `:${streamNum}`
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let targetBitrate = getTargetBitrate(resolution, fps)
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let shouldInitVaapi = (streamNum == undefined || streamNum <= latestStreamNum)
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if (targetBitrate > inputBitrate) {
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targetBitrate = inputBitrate
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}
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logger.info(`Building encoder options, received ${JSON.stringify(params)}`)
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if (shouldInitVaapi && streamNum != undefined) {
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latestStreamNum = streamNum
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}
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// You can also return a promise
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const options = {
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scaleFilter: {
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// name: pluginSettings.hardwareDecode ? 'scale_vaapi' : 'format=nv12,hwupload,scale_vaapi'
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name: 'scale'
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},
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inputOptions: shouldInitVaapi ? buildInitOptions() : [],
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outputOptions: [
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`-tune ${pluginSettings.liveQuality}`,
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`-r:v${streamSuffix} ${fps}`,
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`-profile:v${streamSuffix} high`,
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// `-level:v${streamSuffix} 3.1`,
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`-g:v${streamSuffix} ${fps*2}`,
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`-b:v${streamSuffix} ${targetBitrate}`,
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`-bufsize ${targetBitrate * 2}`
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]
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}
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logger.info(`EncoderOptions: ${JSON.stringify(options)}`)
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return options
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}
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/**
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* Calculate the target bitrate based on video resolution and FPS.
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*
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* The calculation is based on two values:
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* Bitrate at VideoTranscodingFPS.AVERAGE is always the same as
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* getBaseBitrate(). Bitrate at VideoTranscodingFPS.MAX is always
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* getBaseBitrate() * 1.4. All other values are calculated linearly
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* between these two points.
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*/
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function getTargetBitrate (resolution : VideoResolution, fps : number) : number {
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const baseBitrate = pluginSettings.baseBitrate.get(resolution) || 0
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// The maximum bitrate, used when fps === VideoTranscodingFPS.MAX
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// Based on numbers from Youtube, 60 fps bitrate divided by 30 fps bitrate:
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// 720p: 2600 / 1750 = 1.49
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// 1080p: 4400 / 3300 = 1.33
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const maxBitrate = baseBitrate * 1.4
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const maxBitrateDifference = maxBitrate - baseBitrate
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const maxFpsDifference = 60 - 30
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// For 1080p video with default settings, this results in the following formula:
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// 3300 + (x - 30) * (1320/30)
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// Example outputs:
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// 1080p10: 2420 kbps, 1080p30: 3300 kbps, 1080p60: 4620 kbps
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// 720p10: 1283 kbps, 720p30: 1750 kbps, 720p60: 2450 kbps
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return Math.floor(baseBitrate + (fps - 30) * (maxBitrateDifference / maxFpsDifference))
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}
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@ -1,24 +0,0 @@
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{
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"extends": "@tsconfig/node16/tsconfig.json",
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"compilerOptions": {
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"module": "Node16", // Set this to 'Node16'
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"moduleResolution": "Node16", // Set this to 'Node16'
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"strict": true, // That implies alwaysStrict, noImplicitAny, noImplicitThis
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"alwaysStrict": true, // should already be true because of strict:true
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"noImplicitAny": true, // should already be true because of strict:true
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"noImplicitThis": true, // should already be true because of strict:true
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"noImplicitReturns": true,
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"strictBindCallApply": true, // should already be true because of strict:true
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"noUnusedLocals": true,
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"removeComments": true,
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"sourceMap": true,
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"outDir": "../dist/",
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"paths": {}
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},
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"include": ["./**/*"],
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"exclude": []
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}
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