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Multiple channel recording problem


roberthleeii

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roberthleeii

I have a small problem when recording 1080p shows when there are multiple recordings. I get “hiccups” in some of my 1080p recordings when I have multiple recordings going on at the same time. A 1080p video records fine when it is the only one recording and this has never happened on a lower quality channel. It is a not that big of an issue but annoying. On the effected recordings I will get 1-5 seconds of garbled sound and/or severe video distortion. After the 1-5 seconds it resumes fine until it happens again. If there are problems in the recording there are usually not more than 4 or 5 bad spots in an episode recording. I don’t know if this is some type of read/write, processor speed, or networking issue and don’t know how I would figure out that info.

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Hi, hiccups when watching while recording, or in the completed recording afterwards? Is this coming from hd homerun?

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roberthleeii

Hi, hiccups when watching while recording, or in the completed recording afterwards? Is this coming from hd homerun?

 

the hickups are in the actual recording file. I have two HD Homeruns.

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What is the specs of your server?  Are you on the 3.6 beta release?

 

By the way you described it, it sounds a lot like the problem I have also.  See this thread:

https://emby.media/community/index.php?/topic/58274-emby-dvr-running-on-syno-nas-burst-of-packet-loss/&do=findComment&comment=570343

 

I spent some time debugging it with HDhomerun tech support.  My server is a Synology DS418play.  At first, I was only capable of recording 3 streams concurrently.  If I was recording a fourth one, I started to see big burst of packet loss in the HDhomerun stats.

 

I upgraded my RAM to a 8GB matched pair  (2x4) to activate dual channels memory on my processor.  I gained 1 stream.  Now I can record 4streams without packet loss ( if emby server is not transcoding something, otherwise it will be less than that).  But if I put a fifth one, then packet loss start again.

 

My conclusion so far is that depending on the server hardware specs, emby server can struggle to keep up with multi stream recordings.  I will retest this when emby server 3.6 will be out to see if the improvements announced will have an effect on this.

Edited by rouq
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roberthleeii

What is the specs of your server?  Are you on the 3.6 beta release?

 

By the way you described it, it sounds a lot like the problem I have also.  See this thread:

https://emby.media/community/index.php?/topic/58274-emby-dvr-running-on-syno-nas-burst-of-packet-loss/&do=findComment&comment=570343

 

I spent some time debugging it with HDhomerun tech support.  My server is a Synology DS418play.  At first, I was only capable of recording 3 streams concurrently.  If I was recording a fourth one, I started to see big burst of packet loss in the HDhomerun stats.

 

I upgraded my RAM to a 8GB matched pair  (2x4) to activate dual channels memory on my processor.  I gained 1 stream.  Now I can record 4streams without packet loss ( if emby server is not transcoding something, otherwise it will be less than that).  But if I put a fifth one, then packet loss start again.

 

My conclusion so far is that depending on the server hardware specs, emby server can struggle to keep up with multi stream recordings.  I will retest this when emby server 3.6 will be out to see if the improvements announced will have an effect on this.

 

My server is one I built several years ago. It is an i7-4770k with 16 gb of ram. I am on version 3.5.3.0. 

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roberthleeii

Is this multiple on the same HDHR, or are they spread across the two units?

It seems to happen when there are more than 3 streams recording (both in use). I have no idea if it is tuner specific because I have no idea which stream is coming from the two HDHomeruns.

 

Sent from my SM-N960U using Tapatalk

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kanipek

 

I have a small problem when recording 1080p shows when there are multiple recordings. I get “hiccups” in some of my 1080p recordings when I have multiple recordings going on at the same time. A 1080p video records fine when it is the only one recording and this has never happened on a lower quality channel. It is a not that big of an issue but annoying. On the effected recordings I will get 1-5 seconds of garbled sound and/or severe video distortion. After the 1-5 seconds it resumes fine until it happens again. If there are problems in the recording there are usually not more than 4 or 5 bad spots in an episode recording. I don’t know if this is some type of read/write, processor speed, or networking issue and don’t know how I would figure out that info.

 

Are you running Ethernet or WiFi to the PC?

Have you tweaked the settings on your NIC(s)? There are a few recommended(by SilconDust). Also possibly in your router. My ASUS for example has settings to prioritize streaming traffic. Also separate the router(WiFi) from the tuners - This used to be a huge issue - When I got the ASUS a couple years ago I had to actually move the router to a different room, the strength of the WiFi radio(s) signal was so much stronger than my old Linksys caused issues similar to what you are seeing. 

I routinely record 8+ channels simultaneously without issue using a 10+ year old I7 build. Your issue could be computer related but I would look more to the issues I mentioned above. What type of PC is doing the recording?

Edited by kanipek
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It seems to happen when there are more than 3 streams recording (both in use). I have no idea if it is tuner specific because I have no idea which stream is coming from the two HDHomeruns.

 

Sent from my SM-N960U using Tapatalk

 

Can you try to watch for this the next time it happens?

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