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-rw-r--r--server/helpers/ffmpeg-utils.ts47
1 files changed, 29 insertions, 18 deletions
diff --git a/server/helpers/ffmpeg-utils.ts b/server/helpers/ffmpeg-utils.ts
index eb1c86ab9..13bce7d30 100644
--- a/server/helpers/ffmpeg-utils.ts
+++ b/server/helpers/ffmpeg-utils.ts
@@ -87,7 +87,8 @@ function transcode (options: TranscodeOptions) {
87 let command = ffmpeg(options.inputPath) 87 let command = ffmpeg(options.inputPath)
88 .output(options.outputPath) 88 .output(options.outputPath)
89 .outputOption('-threads ' + CONFIG.TRANSCODING.THREADS) 89 .outputOption('-threads ' + CONFIG.TRANSCODING.THREADS)
90 .preset(standard) 90 .renice(5) // we don't want to make the system unrepsonsive
91 .preset(standard)
91 92
92 let fps = await getVideoFileFPS(options.inputPath) 93 let fps = await getVideoFileFPS(options.inputPath)
93 if (options.resolution !== undefined) { 94 if (options.resolution !== undefined) {
@@ -154,8 +155,8 @@ function getVideoFileStream (path: string) {
154 * and quality. Superfast and ultrafast will give you better 155 * and quality. Superfast and ultrafast will give you better
155 * performance, but then quality is noticeably worse. 156 * performance, but then quality is noticeably worse.
156 */ 157 */
157function veryfast (ffmpeg) { 158function veryfast (_ffmpeg) {
158 ffmpeg 159 _ffmpeg
159 .preset(standard) 160 .preset(standard)
160 .outputOption('-preset:v veryfast') 161 .outputOption('-preset:v veryfast')
161 .outputOption(['--aq-mode=2', '--aq-strength=1.3']) 162 .outputOption(['--aq-mode=2', '--aq-strength=1.3'])
@@ -175,8 +176,8 @@ function veryfast (ffmpeg) {
175/** 176/**
176 * A preset optimised for a stillimage audio video 177 * A preset optimised for a stillimage audio video
177 */ 178 */
178function audio (ffmpeg) { 179function audio (_ffmpeg) {
179 ffmpeg 180 _ffmpeg
180 .preset(veryfast) 181 .preset(veryfast)
181 .outputOption('-tune stillimage') 182 .outputOption('-tune stillimage')
182} 183}
@@ -185,15 +186,22 @@ function audio (ffmpeg) {
185 * A toolbox to play with audio 186 * A toolbox to play with audio
186 */ 187 */
187namespace audio { 188namespace audio {
188 export const get = (ffmpeg, pos = 0) => { 189 export const get = (_ffmpeg, pos: number | string = 0) => {
189 // without position, ffprobe considers the last input only 190 // without position, ffprobe considers the last input only
190 // we make it consider the first input only 191 // we make it consider the first input only
191 ffmpeg 192 // if you pass a file path to pos, then ffprobe acts on that file directly
192 .ffprobe(pos, (_,data) => { 193 return new Promise<any>((res, rej) => {
193 return data['streams'].find(stream => { 194 _ffmpeg
194 return stream['codec_type'] === 'audio' 195 .ffprobe(pos, (err,data) => {
196 if (err) return rej(err)
197
198 if ('streams' in data) {
199 return res(data['streams'].find(stream => stream['codec_type'] === 'audio'))
200 } else {
201 rej()
202 }
195 }) 203 })
196 }) 204 })
197 } 205 }
198 206
199 export namespace bitrate { 207 export namespace bitrate {
@@ -229,34 +237,37 @@ namespace audio {
229 * As for the audio, quality '5' is the highest and ensures 96-112kbps/channel 237 * As for the audio, quality '5' is the highest and ensures 96-112kbps/channel
230 * See https://trac.ffmpeg.org/wiki/Encode/AAC#fdk_vbr 238 * See https://trac.ffmpeg.org/wiki/Encode/AAC#fdk_vbr
231 */ 239 */
232async function standard (ffmpeg) { 240async function standard (_ffmpeg) {
233 let _bitrate = audio.bitrate.baseKbitrate 241 let _bitrate = audio.bitrate.baseKbitrate
234 let _ffmpeg = ffmpeg 242 let localFfmpeg = _ffmpeg
235 .format('mp4') 243 .format('mp4')
236 .videoCodec('libx264') 244 .videoCodec('libx264')
237 .outputOption('-level 3.1') // 3.1 is the minimal ressource allocation for our highest supported resolution 245 .outputOption('-level 3.1') // 3.1 is the minimal ressource allocation for our highest supported resolution
238 .outputOption('-b_strategy 1') // NOTE: b-strategy 1 - heuristic algorythm, 16 is optimal B-frames for it 246 .outputOption('-b_strategy 1') // NOTE: b-strategy 1 - heuristic algorythm, 16 is optimal B-frames for it
239 .outputOption('-bf 16') // NOTE: Why 16: https://github.com/Chocobozzz/PeerTube/pull/774. b-strategy 2 -> B-frames<16 247 .outputOption('-bf 16') // NOTE: Why 16: https://github.com/Chocobozzz/PeerTube/pull/774. b-strategy 2 -> B-frames<16
248 .outputOption('-map_metadata -1') // strip all metadata
240 .outputOption('-movflags faststart') 249 .outputOption('-movflags faststart')
241 let _audio = audio.get(_ffmpeg) 250 let _audio = audio.get(localFfmpeg)
251 .then(res => res)
252 .catch(_ => undefined)
242 253
243 if (!_audio) return _ffmpeg.noAudio() 254 if (!_audio) return localFfmpeg.noAudio()
244 255
245 // we try to reduce the ceiling bitrate by making rough correspondances of bitrates 256 // we try to reduce the ceiling bitrate by making rough correspondances of bitrates
246 // of course this is far from perfect, but it might save some space in the end 257 // of course this is far from perfect, but it might save some space in the end
247 if (audio.bitrate[_audio['codec_name']]) { 258 if (audio.bitrate[_audio['codec_name']]) {
248 _bitrate = audio.bitrate[_audio['codec_name']](_audio['bit_rate']) 259 _bitrate = audio.bitrate[_audio['codec_name']](_audio['bit_rate'])
249 if (_bitrate === -1) { 260 if (_bitrate === -1) {
250 return _ffmpeg.audioCodec('copy') 261 return localFfmpeg.audioCodec('copy')
251 } 262 }
252 } 263 }
253 264
254 // we favor VBR, if a good AAC encoder is available 265 // we favor VBR, if a good AAC encoder is available
255 if ((await checkFFmpegEncoders()).get('libfdk_aac')) { 266 if ((await checkFFmpegEncoders()).get('libfdk_aac')) {
256 return _ffmpeg 267 return localFfmpeg
257 .audioCodec('libfdk_aac') 268 .audioCodec('libfdk_aac')
258 .audioQuality(5) 269 .audioQuality(5)
259 } 270 }
260 271
261 return _ffmpeg.audioBitrate(_bitrate) 272 return localFfmpeg.audioBitrate(_bitrate)
262} 273}