import * as ffmpeg from 'fluent-ffmpeg'
import { join } from 'path'
-import { VideoResolution, getTargetBitrate } from '../../shared/models/videos'
-import { CONFIG, FFMPEG_NICE, VIDEO_TRANSCODING_FPS } from '../initializers'
+import { getTargetBitrate, VideoResolution } from '../../shared/models/videos'
+import { CONFIG, FFMPEG_NICE, VIDEO_TRANSCODING_FPS } from '../initializers/constants'
import { processImage } from './image-utils'
import { logger } from './logger'
import { checkFFmpegEncoders } from '../initializers/checker-before-init'
async function getVideoFileFPS (path: string) {
const videoStream = await getVideoFileStream(path)
- for (const key of [ 'r_frame_rate' , 'avg_frame_rate' ]) {
+ for (const key of [ 'avg_frame_rate', 'r_frame_rate' ]) {
const valuesText: string = videoStream[key]
if (!valuesText) continue
function transcode (options: TranscodeOptions) {
return new Promise<void>(async (res, rej) => {
- let fps = await getVideoFileFPS(options.inputPath)
- // On small/medium resolutions, limit FPS
- // if (
- // options.resolution !== undefined &&
- // options.resolution < VIDEO_TRANSCODING_FPS.KEEP_ORIGIN_FPS_RESOLUTION_MIN &&
- // fps > VIDEO_TRANSCODING_FPS.AVERAGE
- // ) {
- // fps = VIDEO_TRANSCODING_FPS.AVERAGE
- // }
-
- let command = ffmpeg(options.inputPath, { niceness: FFMPEG_NICE.TRANSCODING })
- .output(options.outputPath)
- command = await presetH264(command, options.resolution, fps)
-
- if (CONFIG.TRANSCODING.THREADS > 0) {
- // if we don't set any threads ffmpeg will chose automatically
- command = command.outputOption('-threads ' + CONFIG.TRANSCODING.THREADS)
- }
+ try {
+ let fps = await getVideoFileFPS(options.inputPath)
+ // On small/medium resolutions, limit FPS
+ if (
+ options.resolution !== undefined &&
+ options.resolution < VIDEO_TRANSCODING_FPS.KEEP_ORIGIN_FPS_RESOLUTION_MIN &&
+ fps > VIDEO_TRANSCODING_FPS.AVERAGE
+ ) {
+ fps = VIDEO_TRANSCODING_FPS.AVERAGE
+ }
- if (options.resolution !== undefined) {
- // '?x720' or '720x?' for example
- const size = options.isPortraitMode === true ? `${options.resolution}x?` : `?x${options.resolution}`
- command = command.size(size)
- }
+ let command = ffmpeg(options.inputPath, { niceness: FFMPEG_NICE.TRANSCODING })
+ .output(options.outputPath)
+ command = await presetH264(command, options.resolution, fps)
- if (fps) {
- // Hard FPS limits
- if (fps > VIDEO_TRANSCODING_FPS.MAX) fps = VIDEO_TRANSCODING_FPS.MAX
- else if (fps < VIDEO_TRANSCODING_FPS.MIN) fps = VIDEO_TRANSCODING_FPS.MIN
+ if (CONFIG.TRANSCODING.THREADS > 0) {
+ // if we don't set any threads ffmpeg will chose automatically
+ command = command.outputOption('-threads ' + CONFIG.TRANSCODING.THREADS)
+ }
- command = command.withFPS(fps)
- }
+ if (options.resolution !== undefined) {
+ // '?x720' or '720x?' for example
+ const size = options.isPortraitMode === true ? `${options.resolution}x?` : `?x${options.resolution}`
+ command = command.size(size)
+ }
- command
- .on('error', (err, stdout, stderr) => {
- logger.error('Error in transcoding job.', { stdout, stderr })
- return rej(err)
- })
- .on('end', res)
- .run()
+ if (fps) {
+ // Hard FPS limits
+ if (fps > VIDEO_TRANSCODING_FPS.MAX) fps = VIDEO_TRANSCODING_FPS.MAX
+ else if (fps < VIDEO_TRANSCODING_FPS.MIN) fps = VIDEO_TRANSCODING_FPS.MIN
+
+ command = command.withFPS(fps)
+ }
+
+ command
+ .on('error', (err, stdout, stderr) => {
+ logger.error('Error in transcoding job.', { stdout, stderr })
+ return rej(err)
+ })
+ .on('end', res)
+ .run()
+ } catch (err) {
+ return rej(err)
+ }
})
}
if (err) return rej(err)
const videoStream = metadata.streams.find(s => s.codec_type === 'video')
- if (!videoStream) throw new Error('Cannot find video stream of ' + path)
+ if (!videoStream) return rej(new Error('Cannot find video stream of ' + path))
return res(videoStream)
})
* and quality. Superfast and ultrafast will give you better
* performance, but then quality is noticeably worse.
*/
-async function presetH264VeryFast (ffmpeg: ffmpeg, resolution: VideoResolution, fps: number): ffmpeg {
- const localFfmpeg = await presetH264(ffmpeg, resolution, fps)
- localFfmpeg
- .outputOption('-preset:v veryfast')
- .outputOption(['--aq-mode=2', '--aq-strength=1.3'])
+async function presetH264VeryFast (command: ffmpeg.FfmpegCommand, resolution: VideoResolution, fps: number): Promise<ffmpeg.FfmpegCommand> {
+ let localCommand = await presetH264(command, resolution, fps)
+ localCommand = localCommand.outputOption('-preset:v veryfast')
+ .outputOption([ '--aq-mode=2', '--aq-strength=1.3' ])
/*
MAIN reference: https://slhck.info/video/2017/03/01/rate-control.html
Our target situation is closer to a livestream than a stream,
Make up for most of the loss of grain and macroblocking
with less computing power.
*/
+
+ return localCommand
}
/**
* A preset optimised for a stillimage audio video
*/
-async function presetStillImageWithAudio (ffmpeg: ffmpeg, resolution: VideoResolution, fps: number): ffmpeg {
- const localFfmpeg = await presetH264VeryFast(ffmpeg, resolution, fps)
- localFfmpeg
- .outputOption('-tune stillimage')
+async function presetStillImageWithAudio (
+ command: ffmpeg.FfmpegCommand,
+ resolution: VideoResolution,
+ fps: number
+): Promise<ffmpeg.FfmpegCommand> {
+ let localCommand = await presetH264VeryFast(command, resolution, fps)
+ localCommand = localCommand.outputOption('-tune stillimage')
+
+ return localCommand
}
/**
* A toolbox to play with audio
*/
namespace audio {
- export const get = (_ffmpeg, pos: number | string = 0) => {
+ export const get = (option: ffmpeg.FfmpegCommand | string) => {
// without position, ffprobe considers the last input only
// we make it consider the first input only
// if you pass a file path to pos, then ffprobe acts on that file directly
return new Promise<{ absolutePath: string, audioStream?: any }>((res, rej) => {
- _ffmpeg.ffprobe(pos, (err,data) => {
+
+ function parseFfprobe (err: any, data: ffmpeg.FfprobeData) {
if (err) return rej(err)
if ('streams' in data) {
- const audioStream = data['streams'].find(stream => stream['codec_type'] === 'audio')
+ const audioStream = data.streams.find(stream => stream['codec_type'] === 'audio')
if (audioStream) {
return res({
absolutePath: data.format.filename,
})
}
}
+
return res({ absolutePath: data.format.filename })
- })
+ }
+
+ if (typeof option === 'string') {
+ return ffmpeg.ffprobe(option, parseFfprobe)
+ }
+
+ return option.ffprobe(parseFfprobe)
})
}
* As for the audio, quality '5' is the highest and ensures 96-112kbps/channel
* See https://trac.ffmpeg.org/wiki/Encode/AAC#fdk_vbr
*/
-async function presetH264 (ffmpeg: ffmpeg, resolution: VideoResolution, fps: number): ffmpeg {
- let localFfmpeg = ffmpeg
+async function presetH264 (command: ffmpeg.FfmpegCommand, resolution: VideoResolution, fps: number): Promise<ffmpeg.FfmpegCommand> {
+ let localCommand = command
.format('mp4')
.videoCodec('libx264')
.outputOption('-level 3.1') // 3.1 is the minimal ressource allocation for our highest supported resolution
.outputOption('-b_strategy 1') // NOTE: b-strategy 1 - heuristic algorythm, 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')
- const _audio = await audio.get(localFfmpeg)
- if (!_audio.audioStream) {
- return localFfmpeg.noAudio()
- }
+ const parsedAudio = await audio.get(localCommand)
- // we favor VBR, if a good AAC encoder is available
- if ((await checkFFmpegEncoders()).get('libfdk_aac')) {
- return localFfmpeg
+ if (!parsedAudio.audioStream) {
+ localCommand = localCommand.noAudio()
+ } else if ((await checkFFmpegEncoders()).get('libfdk_aac')) { // we favor VBR, if a good AAC encoder is available
+ localCommand = localCommand
.audioCodec('libfdk_aac')
.audioQuality(5)
+ } else {
+ // we try to reduce the ceiling bitrate by making rough correspondances of bitrates
+ // of course this is far from perfect, but it might save some space in the end
+ const audioCodecName = parsedAudio.audioStream[ 'codec_name' ]
+ let bitrate: number
+ if (audio.bitrate[ audioCodecName ]) {
+ localCommand = localCommand.audioCodec('aac')
+
+ bitrate = audio.bitrate[ audioCodecName ](parsedAudio.audioStream[ 'bit_rate' ])
+ if (bitrate !== undefined && bitrate !== -1) localCommand = localCommand.audioBitrate(bitrate)
+ }
}
- // we try to reduce the ceiling bitrate by making rough correspondances of bitrates
- // of course this is far from perfect, but it might save some space in the end
- const audioCodecName = _audio.audioStream['codec_name']
- let bitrate: number
- if (audio.bitrate[audioCodecName]) {
- bitrate = audio.bitrate[audioCodecName](_audio.audioStream['bit_rate'])
-
- if (bitrate === -1) return localFfmpeg.audioCodec('copy')
- }
-
- if (bitrate !== undefined) return localFfmpeg.audioBitrate(bitrate)
-
// Constrained Encoding (VBV)
// https://slhck.info/video/2017/03/01/rate-control.html
// https://trac.ffmpeg.org/wiki/Limiting%20the%20output%20bitrate
const targetBitrate = getTargetBitrate(resolution, fps, VIDEO_TRANSCODING_FPS)
- localFfmpeg = localFfmpeg.outputOptions([`-maxrate ${ targetBitrate }`, `-bufsize ${ targetBitrate * 2 }`])
+ localCommand = localCommand.outputOptions([`-maxrate ${ targetBitrate }`, `-bufsize ${ targetBitrate * 2 }`])
// Keyframe interval of 2 seconds for faster seeking and resolution switching.
// https://streaminglearningcenter.com/blogs/whats-the-right-keyframe-interval.html
// https://superuser.com/a/908325
- localFfmpeg = localFfmpeg.outputOption(`-g ${ fps * 2 }`)
+ localCommand = localCommand.outputOption(`-g ${ fps * 2 }`)
- return localFfmpeg
+ return localCommand
}
projects / github / Chocobozzz / PeerTube.git / blobdiff