From f443a74649174b2f9347c158e30f8ac7aa3e958a Mon Sep 17 00:00:00 2001
From: Chocobozzz <me@florianbigard.com>
Date: Fri, 4 Mar 2022 13:40:02 +0100
Subject: Add latency setting support
---
server/helpers/ffmpeg/ffmpeg-live.ts | 39 +++++++++++++++++++++++++++++-------
1 file changed, 32 insertions(+), 7 deletions(-)
(limited to 'server/helpers/ffmpeg/ffmpeg-live.ts')
diff --git a/server/helpers/ffmpeg/ffmpeg-live.ts b/server/helpers/ffmpeg/ffmpeg-live.ts
index ff571626c..fd20971eb 100644
--- a/server/helpers/ffmpeg/ffmpeg-live.ts
+++ b/server/helpers/ffmpeg/ffmpeg-live.ts
@@ -1,7 +1,7 @@
import { FfmpegCommand, FilterSpecification } from 'fluent-ffmpeg'
import { join } from 'path'
import { VIDEO_LIVE } from '@server/initializers/constants'
-import { AvailableEncoders } from '@shared/models'
+import { AvailableEncoders, LiveVideoLatencyMode } from '@shared/models'
import { logger, loggerTagsFactory } from '../logger'
import { buildStreamSuffix, getFFmpeg, getScaleFilter, StreamType } from './ffmpeg-commons'
import { getEncoderBuilderResult } from './ffmpeg-encoders'
@@ -15,6 +15,7 @@ async function getLiveTranscodingCommand (options: {
outPath: string
masterPlaylistName: string
+ latencyMode: LiveVideoLatencyMode
resolutions: number[]
@@ -26,7 +27,7 @@ async function getLiveTranscodingCommand (options: {
availableEncoders: AvailableEncoders
profile: string
}) {
- const { inputUrl, outPath, resolutions, fps, bitrate, availableEncoders, profile, masterPlaylistName, ratio } = options
+ const { inputUrl, outPath, resolutions, fps, bitrate, availableEncoders, profile, masterPlaylistName, ratio, latencyMode } = options
const command = getFFmpeg(inputUrl, 'live')
@@ -120,14 +121,21 @@ async function getLiveTranscodingCommand (options: {
command.complexFilter(complexFilter)
- addDefaultLiveHLSParams(command, outPath, masterPlaylistName)
+ addDefaultLiveHLSParams({ command, outPath, masterPlaylistName, latencyMode })
command.outputOption('-var_stream_map', varStreamMap.join(' '))
return command
}
-function getLiveMuxingCommand (inputUrl: string, outPath: string, masterPlaylistName: string) {
+function getLiveMuxingCommand (options: {
+ inputUrl: string
+ outPath: string
+ masterPlaylistName: string
+ latencyMode: LiveVideoLatencyMode
+}) {
+ const { inputUrl, outPath, masterPlaylistName, latencyMode } = options
+
const command = getFFmpeg(inputUrl, 'live')
command.outputOption('-c:v copy')
@@ -135,22 +143,39 @@ function getLiveMuxingCommand (inputUrl: string, outPath: string, masterPlaylist
command.outputOption('-map 0:a?')
command.outputOption('-map 0:v?')
- addDefaultLiveHLSParams(command, outPath, masterPlaylistName)
+ addDefaultLiveHLSParams({ command, outPath, masterPlaylistName, latencyMode })
return command
}
+function getLiveSegmentTime (latencyMode: LiveVideoLatencyMode) {
+ if (latencyMode === LiveVideoLatencyMode.SMALL_LATENCY) {
+ return VIDEO_LIVE.SEGMENT_TIME_SECONDS.SMALL_LATENCY
+ }
+
+ return VIDEO_LIVE.SEGMENT_TIME_SECONDS.DEFAULT_LATENCY
+}
+
// ---------------------------------------------------------------------------
export {
+ getLiveSegmentTime,
+
getLiveTranscodingCommand,
getLiveMuxingCommand
}
// ---------------------------------------------------------------------------
-function addDefaultLiveHLSParams (command: FfmpegCommand, outPath: string, masterPlaylistName: string) {
- command.outputOption('-hls_time ' + VIDEO_LIVE.SEGMENT_TIME_SECONDS)
+function addDefaultLiveHLSParams (options: {
+ command: FfmpegCommand
+ outPath: string
+ masterPlaylistName: string
+ latencyMode: LiveVideoLatencyMode
+}) {
+ const { command, outPath, masterPlaylistName, latencyMode } = options
+
+ command.outputOption('-hls_time ' + getLiveSegmentTime(latencyMode))
command.outputOption('-hls_list_size ' + VIDEO_LIVE.SEGMENTS_LIST_SIZE)
command.outputOption('-hls_flags delete_segments+independent_segments')
command.outputOption(`-hls_segment_filename ${join(outPath, '%v-%06d.ts')}`)
--
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