Forum

SRT and UDP for broadcast delievery

Aaron 2018-12-18 19:34:17 UTC in Nimble Streamer

So here is what I'm doing I have a main server the ingests several SPTS from my Motorola BNC systems for satellite broadcast. I want to send these streams to various locations around the world that my C-Band satellite over North America cannot reach. Specifically my Work flow is as follows UDP IP IN -> Main SRT Delievery Server -> SRT OUT -> internet -> Remote Device SRT In -> Output UDP Multicast streams. Everything in this work flow works great except the last step which is the UDP output. I can watch the UDP output just fine in VLC and TSReader doesn't see any issues with it from what I can tell. However when I in my testing or others at the remote site try to groom this feed into there hardware/software cherry pickers to grooming into there IP video setup for what is I would assume STB delivery they are complaining of a high I assuming PCR Jitter of 100ms +. I'm also having similar issues decoding the UDP streams with a hardware IRD. Also, I have not issue monitor stream on the receiving side using HLS, RTMP, … so I'm confident the stream is making to the end device just fine using SRT.

I have tried various nimble reciever setup specifically both windows an linux and did the various TCP stack tuning but it doesn't seems to help at all. Since this only seems to be an issue with UDP output to hardware decoders. To me the output UDP traffic looks too bursty for what is probably a small input buffer on the IRD to handle but that is just a guess.

If anyone has any ideas on how to get this work, what the issue maybe or has done this succefully I would love to know how you did it.

Max 2018-12-19 04:52:16 UTC 

Hello Aaron,

How did you get that there is high PCR jitter, is it just a guess or you see it in some logs/tool output?

To reduce PCR jitter please try to enable "Mux rate" option on SRT receivers broadcasting stream(s) via UDP (i.e. in UDP streaming options), set "Mux rate" to e.g. 10-20% higher than input stream's bitrate and check if it helps.

Max 2018-12-19 04:52:30 UTC 
Aaron 2019-01-02 22:09:54 UTC 

Just to follow up after lot of trial and error and help for the support folks I did get this setup to work. See details below:

1. Disable Windows Defender on receiving nimble - this was causing all kinds of packet out of order issues, bandwidth spikes, and latency problems.

2. Disabled Windows firewall on the NIC sending out the UDP Multicast stream

3. This one maybe specific to the hardware decoder and the stream I'm sending but I needed to enable the MUX Rate options on the out going UDP streams and set the MUX delay to 4000ms. I think this value has to do with my older h.264 hardware decoders I'm using that are part of my satellite uplink. If I was doing this with one of my MPEG2 video streams I suspect the default 700ms value would work just fine.

4. This last one is probably specific to my IRD I'm using to decode the video but I had to set it's multicast input stream buffer to it's lowest setting of 50ms anything higher and I had issues decoding the stream. This one wasn't very intuitive to figure out. Since I was having problems I was raising the size which didn't help.

Post a reply


Post a new question

Categories:

Tags:

nimbleNimble StreamerFAQHLSDVRRTMPhlsnimble streamerABRwmsauthcacheNimbleffmpegAPIapitranscoderdvrVODstreamingfailoverDASHwmspanelrtmpvodudprtsppaywallsubtitlesRTSPDispersayoutubelivelivestreamingmp4MPEG-DASHWMSAuthgeopay-per-viewdashstreamerabrWindowsencryptionUDPwhite labelconfiguser agentsmilvideoFFMPEGmulticastMPEG-TSaudioedgere-streamingCORSraspberry pichunksandroidsldpbandwidthmpeg-dashadvertizerDRMvlcrules.confadvertisingipv6FastSpringRAMwms panelthumbnailFMLEVATcrossdomainupdatehttpsmpegtsRecordingSMILplaylistpushaesakamaiserverssslSRTwowzam3u8TranscodeerrorSSLbalanceplaylist_dvrWowzachromecastconfigurationreportingsrtbugIDdownloadS3corsnimblestreamerdomainperformanceIPmpeg-tschunkraspianawspublish controlcodecmobileWMSPanelrepublishingloopVidillionHttpsnimble webcam html5UIRegistration Issuedirect link32-bit Windowstwitchanalysecache_controlitworkmelive abr support mpeg-dashrtmp abrbeirutWWDCdubaideep statshls to multicast udplogIIS Smooth StreamingcloudmediaCDNHTTPSAbrHot-linking protectionHDSvaddioMPEGTSalertsNDIViewer Statsjwplayer websitewhmcsbaselineAuthentication in HLSnginx rtmp nimbleCentOS v6.4durationAV BridgepricelimitOld logsVaddioscreencastPI3 Ubuntuview timewmspanelapiattaching domainsinterfacesDVRRecordingWMSCONFIG_HOMEmessageloadbalancingrestreamcostmetadatamod_rewriteoriginprofileAxisgbpsID3 tagsanalisyswmsauthsignhighhds streamhls restreamingciscolocalVLCresumenibler.net hotlinkVideo Playertransocding republishingdecodergentoo install server nimbleAliastranscoding using NvidiaPublic IpPaywall Authlost trafficdocumentationofflineconcurrent-connectionsTrancoderfilelebanonlocationmanifestipMP4 not playedspaceicecast urlruleServer-sidetasks-controlhot linkingseekingchangestoppedamfmainplayoutPlayReadylimuxamazon web servicedvr streamconnectivityunique visitordvr stream twiceonAXVVGhot-linkpay per viewaliasdata slicesblockHLS vodmpeg dash7TCOanalyticsapplicationpaywalbrandingopenssltrialMP4microsoft streamerrorsrocksoftlog traffic statsExpression EncoderdebianABR DASHprogressive downloadHLS Playermultiple originsFFmpegnimblesessionidDASH Playerlive video on demandbandwithCSSserverlog nimble analysertmp playbackvideojsbitrateadaptiveAV1 codecprivate networkJWPLAYERNGINX-RTMPSnapshotsno WMSPanellive videoPullmac osx installsourcecrossdomain more then 1 domain4KwotermarksoundHLS Meta Tag editing.streamsattachmenthelp errorvimeoload balanceconcurrent connectionvod no soundbuttcdnvsomFairplayfallbackamazonControl APIlive streamTranscoderLive streamingWidevineRemote StorageWowza Agentsecuritynot foundpullmpeg2tsServer-Side-Task-ControlAS3disk migrationstereo to monoscreen captureinstall players setup ready to goDVRSettingstwitch larix broadcaster androidAppleDelete recordsicecastdrmresourceaes encryptionsubscriptionlive pull settingsABR HLS Bitratesvideo looprtmp for YouTubestarttime duration seekpointrebootdvr streamsmonitornimble streamer web server php script pageautomationNimble Streamer APIlivestreamoutrateIIS Media Servicsrtmp republishing transcodenimble.confDeep statsapi accessNimble CapacityABR DVR probleminterleavingweb playernimble streamer vod hls transmuxingloggingLive SwitcherlearnerCross Domainscreen freezecan't registercontent-dispositionnot to stealLive Broadcastinsert logoheaderactionscript 3block downloadAVCaptureMovieFileOutputNimble ServerbroadcasterUbuntu artful 17.10Transcoder MPEG DASHMPEG DASHadd_chunk failedPost processingfake extensiontranscodingFFMPEG;RTMP;I/O errorstatus:errorHotlinking ProtectionStreaming routeMPEG-Dashlarix broadcasternimble on cloudroutesprerollThumbnailsserver incorrect timepremium featureLIVELivepaymentincoming streamno soundstatsHow to do live stream with multiple audio tracknimble aliasesProgressivereloadRTMP republishrmtpno internetvp9addemandSecurelivestreamintransocderraspberryavoid refreshreportsAndroiduser_agentdvr on wmspanelS3 AWScloudfrontIOSrestartPIDHLS Streamingthumbnail dvr-thumbnailwmsAuthSignnimble streamer mpeg-ts multiple inputsLoad-BalancingcredentialslatencytranscodeRepublishingadjustDVR SettingPORTHTML5 playerdelaympeg4issuepricingtranscoder nimbleBroadcastLarixABR bitratesPacketizingbuildTeradek Decoderubuntu 18SLDPav1 codec21server iphttp servera recordVR-360Failoverstorage space availablediskNimble connectionsabr fallbackDVRStreamsrulesError when installingdissapointmentpay-per-minuteAWSSO_RCVBUFbuffering videolivestream bitrateUDP Multicastlogo in streamMPEG2 VideossaiDVR Setting limitbufferprogressivewebhookdvr to livefastspringmp2 audiocache expiryQuickTimevideo streamingrtsp push androidartifactstraffichd25publish streamAArch64storagealias route.movdistributionoutputVOD HLS streaming on public IPdomain lockRTMP Republishcontentspeedup my videoiOSqataritworkscdnvideo.js

This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the Privacy Policy. If you want to know more or withdraw your consent to all or some of the cookies, please refer to the Privacy Policy.
By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to the use of cookies.