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Merge pull request #150 from svdztn/seekback-support

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Seekback support
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advplyr 2021-10-26 16:53:06 -05:00 committed by GitHub
commit 550873ff87
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1 changed files with 26 additions and 14 deletions
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server/objects/Stream.js
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@ -16,6 +16,7 @@ class Stream extends EventEmitter {
this.audiobook = audiobook this.audiobook = audiobook
this.segmentLength = 6 this.segmentLength = 6
this.maxSeekBackTime = 30
this.streamPath = Path.join(streamPath, this.id) this.streamPath = Path.join(streamPath, this.id)
this.concatFilesPath = Path.join(this.streamPath, 'files.txt') this.concatFilesPath = Path.join(this.streamPath, 'files.txt')
this.playlistPath = Path.join(this.streamPath, 'output.m3u8') this.playlistPath = Path.join(this.streamPath, 'output.m3u8')
@ -67,7 +68,7 @@ class Stream extends EventEmitter {
get segmentStartNumber() { get segmentStartNumber() {
if (!this.startTime) return 0 if (!this.startTime) return 0
return Math.floor(this.startTime / this.segmentLength) return Math.floor(Math.max(this.startTime - this.maxSeekBackTime, 0) / this.segmentLength)
} }
get numSegments() { get numSegments() {
@ -82,6 +83,18 @@ class Stream extends EventEmitter {
return this.audiobook.tracks return this.audiobook.tracks
} }
get clientUser() {
return this.client.user || {}
}
get clientUserAudiobooks() {
return this.clientUser.audiobooks || {}
}
get clientUserAudiobookData() {
return this.clientUserAudiobooks[this.audiobookId]
}
get clientPlaylistUri() { get clientPlaylistUri() {
return `/hls/${this.id}/output.m3u8` return `/hls/${this.id}/output.m3u8`
} }
@ -104,18 +117,17 @@ class Stream extends EventEmitter {
clientCurrentTime: this.clientCurrentTime, clientCurrentTime: this.clientCurrentTime,
startTime: this.startTime, startTime: this.startTime,
segmentStartNumber: this.segmentStartNumber, segmentStartNumber: this.segmentStartNumber,
isTranscodeComplete: this.isTranscodeComplete isTranscodeComplete: this.isTranscodeComplete,
lastUpdate: this.clientUserAudiobookData ? this.clientUserAudiobookData.lastUpdate : 0
} }
} }
init() { init() {
var clientUserAudiobooks = this.client.user ? this.client.user.audiobooks || {} : {} if (this.clientUserAudiobookData) {
var userAudiobook = clientUserAudiobooks[this.audiobookId] || null var timeRemaining = this.totalDuration - this.clientUserAudiobookData.currentTime
if (userAudiobook) { Logger.info('[STREAM] User has progress for audiobook', this.clientUserAudiobookData.progress, `Time Remaining: ${timeRemaining}s`)
var timeRemaining = this.totalDuration - userAudiobook.currentTime
Logger.info('[STREAM] User has progress for audiobook', userAudiobook.progress, `Time Remaining: ${timeRemaining}s`)
if (timeRemaining > 15) { if (timeRemaining > 15) {
this.startTime = userAudiobook.currentTime this.startTime = this.clientUserAudiobookData.currentTime
this.clientCurrentTime = this.startTime this.clientCurrentTime = this.startTime
} }
} }
@ -239,22 +251,22 @@ class Stream extends EventEmitter {
this.ffmpeg = Ffmpeg() this.ffmpeg = Ffmpeg()
var trackStartTime = await writeConcatFile(this.tracks, this.concatFilesPath, this.startTime) var adjustedStartTime = Math.max(this.startTime - this.maxSeekBackTime, 0)
var trackStartTime = await writeConcatFile(this.tracks, this.concatFilesPath, adjustedStartTime)
this.ffmpeg.addInput(this.concatFilesPath) this.ffmpeg.addInput(this.concatFilesPath)
// seek_timestamp : https://ffmpeg.org/ffmpeg.html // seek_timestamp : https://ffmpeg.org/ffmpeg.html
// the argument to the -ss option is considered an actual timestamp, and is not offset by the start time of the file // the argument to the -ss option is considered an actual timestamp, and is not offset by the start time of the file
// note: this may result in the same thing as output seeking, fixes https://github.com/advplyr/audiobookshelf/issues/116 // fixes https://github.com/advplyr/audiobookshelf/issues/116
this.ffmpeg.inputOption('-seek_timestamp 1') this.ffmpeg.inputOption('-seek_timestamp 1')
this.ffmpeg.inputFormat('concat') this.ffmpeg.inputFormat('concat')
this.ffmpeg.inputOption('-safe 0') this.ffmpeg.inputOption('-safe 0')
// this.ffmpeg.inputOption('-segment_time_metadata 1')
if (this.startTime > 0) { if (adjustedStartTime > 0) {
const shiftedStartTime = this.startTime - trackStartTime const shiftedStartTime = adjustedStartTime - trackStartTime
// Issues using exact fractional seconds i.e. 29.49814 - changing to 29.5s // Issues using exact fractional seconds i.e. 29.49814 - changing to 29.5s
var startTimeS = Math.round(shiftedStartTime * 10) / 10 + 's' var startTimeS = Math.round(shiftedStartTime * 10) / 10 + 's'
Logger.info(`[STREAM] Starting Stream at startTime ${secondsToTimestamp(this.startTime)} and Segment #${this.segmentStartNumber}`) Logger.info(`[STREAM] Starting Stream at startTime ${secondsToTimestamp(adjustedStartTime)} (User startTime ${secondsToTimestamp(this.startTime)}) and Segment #${this.segmentStartNumber}`)
this.ffmpeg.inputOption(`-ss ${startTimeS}`) this.ffmpeg.inputOption(`-ss ${startTimeS}`)
this.ffmpeg.inputOption('-noaccurate_seek') this.ffmpeg.inputOption('-noaccurate_seek')