-import { getTargetBitrate } from '../../shared/models/videos'
+import { logger } from '@server/helpers/logger'
+import { getTargetBitrate, VideoResolution } from '../../shared/models/videos'
import { AvailableEncoders, buildStreamSuffix, EncoderOptionsBuilder } from '../helpers/ffmpeg-utils'
-import { ffprobePromise, getAudioStream, getMaxAudioBitrate, getVideoFileBitrate, getVideoStreamFromFile } from '../helpers/ffprobe-utils'
+import {
+ canDoQuickAudioTranscode,
+ ffprobePromise,
+ getAudioStream,
+ getMaxAudioBitrate,
+ getVideoFileBitrate,
+ getVideoStreamFromFile
+} from '../helpers/ffprobe-utils'
import { VIDEO_TRANSCODING_FPS } from '../initializers/constants'
-// ---------------------------------------------------------------------------
-// Available encoders profiles
-// ---------------------------------------------------------------------------
+/**
+ *
+ * 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
const defaultX264VODOptionsBuilder: EncoderOptionsBuilder = async ({ input, resolution, fps }) => {
- let targetBitrate = getTargetBitrate(resolution, fps, VIDEO_TRANSCODING_FPS)
-
- const probe = await ffprobePromise(input)
-
- const videoStream = await getVideoStreamFromFile(input, probe)
- if (!videoStream) {
- return { outputOptions: [ ] }
- }
-
- // Don't transcode to an higher bitrate than the original file
- const fileBitrate = await getVideoFileBitrate(input, probe)
- targetBitrate = Math.min(targetBitrate, fileBitrate)
+ const targetBitrate = await buildTargetBitrate({ input, resolution, fps })
+ if (!targetBitrate) return { outputOptions: [ ] }
return {
outputOptions: [
- `-maxrate ${targetBitrate}`, `-bufsize ${targetBitrate * 2}`
+ `-r ${fps}`,
+ `-maxrate ${targetBitrate}`,
+ `-bufsize ${targetBitrate * 2}`
]
}
}
return {
outputOptions: [
+ `${buildStreamSuffix('-r:v', streamNum)} ${fps}`,
`${buildStreamSuffix('-b:v', streamNum)} ${targetBitrate}`,
`-maxrate ${targetBitrate}`,
`-bufsize ${targetBitrate * 2}`
}
const defaultAACOptionsBuilder: EncoderOptionsBuilder = async ({ input, streamNum }) => {
- const parsedAudio = await getAudioStream(input)
+ const probe = await ffprobePromise(input)
+
+ if (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 bitrate = getMaxAudioBitrate(audioCodecName, parsedAudio.bitrate)
+ logger.debug('Calculating audio bitrate of %s by AAC encoder.', input, { bitrate: parsedAudio.bitrate, audioCodecName })
+
if (bitrate !== undefined && bitrate !== -1) {
return { outputOptions: [ buildStreamSuffix('-b:a', streamNum), bitrate + 'k' ] }
}
- return { copy: true, outputOptions: [] }
+ return { outputOptions: [ ] }
}
const defaultLibFDKAACVODOptionsBuilder: EncoderOptionsBuilder = ({ streamNum }) => {
}
// ---------------------------------------------------------------------------
+async function buildTargetBitrate (options: {
+ input: string
+ resolution: VideoResolution
+ fps: number
+}) {
+ const { input, resolution, fps } = options
+ const probe = await ffprobePromise(input)
+
+ const videoStream = await getVideoStreamFromFile(input, probe)
+ if (!videoStream) return undefined
+
+ const targetBitrate = getTargetBitrate(resolution, fps, VIDEO_TRANSCODING_FPS)
+
+ // Don't transcode to an higher bitrate than the original file
+ const fileBitrate = await getVideoFileBitrate(input, probe)
+ return Math.min(targetBitrate, fileBitrate)
+}