import { logger } from '@server/helpers/logger'
-import { getAverageBitrate, getMinLimitBitrate } from '@shared/core-utils'
-import { AvailableEncoders, EncoderOptionsBuilder, EncoderOptionsBuilderParams, VideoResolution } from '../../../shared/models/videos'
-import {
- buildStreamSuffix,
- canDoQuickAudioTranscode,
- ffprobePromise,
- getAudioStream,
- getMaxAudioBitrate,
- resetSupportedEncoders
-} from '../../helpers/ffmpeg'
-
-/**
- *
- * Available encoders and profiles for the transcoding jobs
- * These functions are used by ffmpeg-utils that will get the encoders and options depending on the chosen profile
- *
- * Resources:
- * * https://slhck.info/video/2017/03/01/rate-control.html
- * * https://trac.ffmpeg.org/wiki/Limiting%20the%20output%20bitrate
- */
-
-// ---------------------------------------------------------------------------
-// Default builders
-// ---------------------------------------------------------------------------
-
-const defaultX264VODOptionsBuilder: EncoderOptionsBuilder = (options: EncoderOptionsBuilderParams) => {
- const { fps, inputRatio, inputBitrate, resolution } = options
-
- // TODO: remove in 4.2, fps is not optional anymore
- if (!fps) return { outputOptions: [ ] }
-
- const targetBitrate = getTargetBitrate({ inputBitrate, ratio: inputRatio, fps, resolution })
-
- return {
- outputOptions: [
- ...getCommonOutputOptions(targetBitrate),
-
- `-r ${fps}`
- ]
- }
-}
-
-const defaultX264LiveOptionsBuilder: EncoderOptionsBuilder = (options: EncoderOptionsBuilderParams) => {
- const { streamNum, fps, inputBitrate, inputRatio, resolution } = options
-
- const targetBitrate = getTargetBitrate({ inputBitrate, ratio: inputRatio, fps, resolution })
-
- return {
- outputOptions: [
- ...getCommonOutputOptions(targetBitrate),
-
- `${buildStreamSuffix('-r:v', streamNum)} ${fps}`,
- `${buildStreamSuffix('-b:v', streamNum)} ${targetBitrate}`
- ]
- }
-}
-
-const defaultAACOptionsBuilder: EncoderOptionsBuilder = async ({ input, streamNum, canCopyAudio }) => {
- const probe = await ffprobePromise(input)
-
- if (canCopyAudio && await canDoQuickAudioTranscode(input, probe)) {
- logger.debug('Copy audio stream %s by AAC encoder.', input)
- return { copy: true, outputOptions: [ ] }
- }
-
- const parsedAudio = await getAudioStream(input, probe)
-
- // We try to reduce the ceiling bitrate by making rough matches of bitrates
- // Of course this is far from perfect, but it might save some space in the end
-
- const audioCodecName = parsedAudio.audioStream['codec_name']
-
- const bitrate = getMaxAudioBitrate(audioCodecName, parsedAudio.bitrate)
-
- logger.debug('Calculating audio bitrate of %s by AAC encoder.', input, { bitrate: parsedAudio.bitrate, audioCodecName })
-
- if (bitrate !== -1) {
- return { outputOptions: [ buildStreamSuffix('-b:a', streamNum), bitrate + 'k' ] }
- }
-
- return { outputOptions: [ ] }
-}
-
-const defaultLibFDKAACVODOptionsBuilder: EncoderOptionsBuilder = ({ streamNum }) => {
- return { outputOptions: [ buildStreamSuffix('-q:a', streamNum), '5' ] }
-}
+import { FFmpegCommandWrapper, getDefaultAvailableEncoders } from '@shared/ffmpeg'
+import { AvailableEncoders, EncoderOptionsBuilder } from '@shared/models'
// ---------------------------------------------------------------------------
// Profile manager to get and change default profiles
live: this.buildDefaultEncodersPriorities()
}
- private readonly availableEncoders = {
- vod: {
- libx264: {
- default: defaultX264VODOptionsBuilder
- },
- aac: {
- default: defaultAACOptionsBuilder
- },
- libfdk_aac: {
- default: defaultLibFDKAACVODOptionsBuilder
- }
- },
- live: {
- libx264: {
- default: defaultX264LiveOptionsBuilder
- },
- aac: {
- default: defaultAACOptionsBuilder
- }
- }
- }
+ private readonly availableEncoders = getDefaultAvailableEncoders()
private availableProfiles = {
vod: [] as string[],
addEncoderPriority (type: 'vod' | 'live', streamType: 'audio' | 'video', encoder: string, priority: number) {
this.encodersPriorities[type][streamType].push({ name: encoder, priority })
- resetSupportedEncoders()
+ FFmpegCommandWrapper.resetSupportedEncoders()
}
removeEncoderPriority (type: 'vod' | 'live', streamType: 'audio' | 'video', encoder: string, priority: number) {
this.encodersPriorities[type][streamType] = this.encodersPriorities[type][streamType]
.filter(o => o.name !== encoder && o.priority !== priority)
- resetSupportedEncoders()
+ FFmpegCommandWrapper.resetSupportedEncoders()
}
private getEncodersByPriority (type: 'vod' | 'live', streamType: 'audio' | 'video') {
export {
VideoTranscodingProfilesManager
}
-
-// ---------------------------------------------------------------------------
-
-function getTargetBitrate (options: {
- inputBitrate: number
- resolution: VideoResolution
- ratio: number
- fps: number
-}) {
- const { inputBitrate, resolution, ratio, fps } = options
-
- const capped = capBitrate(inputBitrate, getAverageBitrate({ resolution, fps, ratio }))
- const limit = getMinLimitBitrate({ resolution, fps, ratio })
-
- return Math.max(limit, capped)
-}
-
-function capBitrate (inputBitrate: number, targetBitrate: number) {
- if (!inputBitrate) return targetBitrate
-
- // Add 30% margin to input bitrate
- const inputBitrateWithMargin = inputBitrate + (inputBitrate * 0.3)
-
- return Math.min(targetBitrate, inputBitrateWithMargin)
-}
-
-function getCommonOutputOptions (targetBitrate: number) {
- return [
- `-preset veryfast`,
- `-maxrate ${targetBitrate}`,
- `-bufsize ${targetBitrate * 2}`,
-
- // NOTE: b-strategy 1 - heuristic algorithm, 16 is optimal B-frames for it
- `-b_strategy 1`,
- // NOTE: Why 16: https://github.com/Chocobozzz/PeerTube/pull/774. b-strategy 2 -> B-frames<16
- `-bf 16`
- ]
-}