DTS Discontinuity Errors - Stream Fails
Added by Scott McGurk about 4 years ago
Hi all,
Looking for a bit of advice on the following problem;
Running TVH 4.3-1896~gce0907705 compiled on Ubuntu 20.04 (Patched up to date) and running into the following.
Tuning to a channel from a client prints the following to the logs;
Sep 2 12:58:15 iptvproxy tvheadend100398: mpegts: 666MHz in DVBT - tuning on HDHomeRun DVB-T Tuner #0 (172.16.11.64)
Sep 2 12:58:15 iptvproxy tvheadend100398: tvhdhomerun: tuning to auto:666000000
Sep 2 12:58:15 iptvproxy tvheadend100398: subscription: 01D4: "172.16.8.133 [ ]" subscribing on channel "STV HD", weight: 150, adapter: "HDHomeRun DVB-T Tuner #0 (172.16.11.64)", network: "DVBT", mux: "666MHz", service: "STV HD", profile="htsp", hostname="172.16.8.133"
Stream starts and all runs well (web interface shows 89% signal and 95% SNR)
Occasionally I'll get logs showing errors;
Sep 2 18:00:15 iptvproxy tvheadend100398: tsfix: The timediff for AAC-LATM is big (1630774480), using current dts
Sep 2 18:14:50 iptvproxy tvheadend100398: tsfix: transport stream AAC-LATM, DTS discontinuity. DTS = 78720000, last = 61551360
Sep 2 18:15:53 iptvproxy tvheadend100398: tsfix: transport stream AAC-LATM, DTS discontinuity. DTS = 84422400, last = 81404160
Sep 2 18:31:38 iptvproxy tvheadend100398: tsfix: transport stream AAC-LATM, DTS discontinuity. DTS = 169459200, last = 139407360
Sep 2 18:45:02 iptvproxy tvheadend100398: tsfix: transport stream AAC-LATM, DTS discontinuity. DTS = 241785600, last = 240840960
Sep 2 18:49:05 iptvproxy tvheadend100398: tsfix: transport stream AAC-LATM, DTS discontinuity. DTS = 263692800, last = 244488960
These don't appear to really affect the stream and things runs as normal until;
Sep 3 06:09:11 iptvproxy tvheadend100398: tsfix: transport stream DVBSUB, DTS discontinuity. DTS = -9223372036854775808, last = 5567160824
Sep 3 06:09:12 iptvproxy tvheadend100398: tsfix: transport stream H264, DTS discontinuity. DTS = -9223372036854775808, last = 5567231571
The stream will then freeze on the client. A restart of the stream will bring it back again but ideally I'd like to avoid the need for that to happen.
I'm looking to see if anybody can shed any light on where the error might be coming from.
I'm concerned that the final DTS difference is massive compared to the others (a rollover of some sort?) but I'm not sure what the DTS is or where its coming from?
thanks
Replies (3)
RE: DTS Discontinuity Errors - Stream Fails - Added by saen acro about 4 years ago
It will be good to share operator name +- location.
/as I see its Scottish Television, correct me if I'm wrong/
Sometime operators do not use "standards" but work on operator STB's
RE: DTS Discontinuity Errors - Stream Fails - Added by Scott McGurk about 4 years ago
Hi,
You're correct in that the channel is STV (Scotland Version of ITV)
Location is Angus, Scotland - the operator is our freeview broadcasts.. I believe the 666mhz MUX is PSB3 / BBCB so I guess BBC are the operator on the mux? Not sure though.
What I do know it that its our public muxes, which any freeview receiver should be able to get over the air without any subscriptions.
Transmitter Ref: https://ukfree.tv/transmitters/tv/Angus
RE: DTS Discontinuity Errors - Stream Fails - Added by Meda Shin about 4 years ago
Scott McGurk wrote:
Hi,
You're correct in that the channel is STV (Scotland Version of ITV)
Location is Angus, Scotland - the operator is our freeview broadcasts.. I believe the 666mhz MUX is PSB3 / BBCB so I guess BBC are the operator on the mux? Not sure though.
What I do know it that its our public muxes, which any freeview receiver should be able to get over the air without any subscriptions.
Transmitter Ref: https://ukfree.tv/transmitters/tv/Angus png to ico
OK, Thank you very much.
Now I understand more.