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slow channel changing

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#1 sbm7815 OFFLINE  

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Posted 14 August 2017 - 02:51 PM

Hi, I recently purchased a lifetime Emby Premiere license to try Live TV with both of my HDHomeRun Prime tuners. I saw that Emby advertised fast channel changing with a decent guide and the possibility of viewing TV remotely, so I thought this would be a good solution for my needs.

 

I'm running Emby on a Xeon E5-2698V4 with 16GB of RAM,  because I wanted fast transcoding times. My client is an Nvidia Shield TV, but I also tested channel changing on the server itself and both are slow. In the beginning it was taking 45 seconds or more to change a channel on my local 1GB network, which was disappointing. I turned on Intel Quicksync and this dropped the channel changing time from 45-65 seconds down to 15-18. If I enable direct play, then it drops down to 10-15 seconds. When I use other direct play clients, like HDHomeRun or Live Channels, the time is only 1-2 seconds.

 

Everything else I've tested in Emby seems great, but if I can't drop the Live TV channel changing time to 1-2 seconds similar to other Android TV clients (direct, I don't expect transcoding to be this fast), then this product will not be useful for me. I also think that other potential customers should be made aware of this problem prior to purchase. If you're advertising fast channel changing, then this is what people will expect when they purchase the product.

 

After searching on this forum, it looks like this may be the normal performance of Emby for Live TV. If anyone knows of a way to improve channel changing times, please let me know.


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#2 maegibbons OFFLINE  

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Posted 14 August 2017 - 03:15 PM

You are right . It is slow.  Too slow.

 

Its been brought up many times and some things have improved it then it seems to slip again due to other compatibilty compromises.

 

It is time that this is really tackled now especially after the great enhancements just recently in the F/ATV client guide by @ebr

 

I think the channels should be probed then this info stored semi permanently in the DB.  Channel stream types dont change that often and could be manually "re-tuned" if there was an issue later on.

 

Krs

 

Mark


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#3 Doofus ONLINE  

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Posted 14 August 2017 - 05:19 PM

One thing I've noticed when you use the HDHR player, is that when changing channel, the tuner isn't turned off and on. It uses the same tuner, and switches channel, instantly. I think this is what the server needs to do. The slowness comes from the tuner initiating. If you use the HDHR player, you can actually see the process. But once initiated, it just switches channel.
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#4 denz OFFLINE  

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Posted 16 August 2017 - 08:46 PM

I got an iptv box and it has Dlna client and the channel change is instant just like in wmc I know it is possible since kodi can do it is only matter of priorities but there has been improvements just we need more.

#5 mini__me OFFLINE  

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Posted 17 August 2017 - 05:46 AM

.


Edited by mini__me, 17 August 2017 - 05:51 AM.


#6 Luke OFFLINE  

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Posted 17 August 2017 - 02:12 PM

We are constantly looking at ways of improving channel changing performance and will continue to improve it in all apps. Thanks.


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#7 BAlGaInTl OFFLINE  

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Posted 23 August 2017 - 08:59 AM

Appreciate that the devs are working on this.

 

It's still my biggest struggle coming from TVHeadend which was near instant in tuning and channel changing.

 

That being said, the gains from having everything in one application is worth the wait for me considering I don't watch a lot of live TV. 


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#8 Luke OFFLINE  

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Posted 23 August 2017 - 11:55 AM

Thanks for the feedback.



#9 afullmark OFFLINE  

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Posted 01 September 2017 - 04:20 AM

Hi, I recently purchased a lifetime Emby Premiere license to try Live TV with both of my HDHomeRun Prime tuners. I saw that Emby advertised fast channel changing with a decent guide and the possibility of viewing TV remotely, so I thought this would be a good solution for my needs.

I'm running Emby on a Xeon E5-2698V4 with 16GB of RAM, because I wanted fast transcoding times. My client is an Nvidia Shield TV, but I also tested channel changing on the server itself and both are slow. In the beginning it was taking 45 seconds or more to change a channel on my local 1GB network, which was disappointing. I turned on Intel Quicksync and this dropped the channel changing time from 45-65 seconds down to 15-18. If I enable direct play, then it drops down to 10-15 seconds. When I use other direct play clients, like HDHomeRun or Live Channels, the time is only 1-2 seconds.

Everything else I've tested in Emby seems great, but if I can't drop the Live TV channel changing time to 1-2 seconds similar to other Android TV clients (direct, I don't expect transcoding to be this fast), then this product will not be useful for me. I also think that other potential customers should be made aware of this problem prior to purchase. If you're advertising fast channel changing, then this is what people will expect when they purchase the product.

After searching on this forum, it looks like this may be the normal performance of Emby for Live TV. If anyone knows of a way to improve channel changing times, please let me know.


I'm on a Shield TV (Android TV), yep, this was something I was disappointed by when I used emby for the first time last week. It was so annoying I just use hdhr or live channels app. We all want that one app to do everything; I'm trying to tear myself from pretty plex (it is so pretty).

Do hope that it can be made more snappy @Luke


Edited by afullmark, 01 September 2017 - 05:38 AM.

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#10 Tur0k OFFLINE  

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Posted 01 September 2017 - 11:57 AM

+1 improving channel tuning speed would be nice.


Sent from my iPhone using Tapatalk

Edited by Tur0k, 01 September 2017 - 03:27 PM.


#11 maegibbons OFFLINE  

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Posted 01 September 2017 - 12:53 PM

+1 more again.

 

Krs

 

Mark



#12 Luke OFFLINE  

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Posted 01 September 2017 - 01:48 PM

I'm on a Shield TV (Android TV), yep, this was something I was disappointed by when I used emby for the first time last week. It was so annoying I just use hdhr or live channels app. We all want that one app to do everything; I'm trying to tear myself from pretty plex (it is so pretty).

Do hope that it can be made more snappy @Luke

 

Where is it prettier than Emby?



#13 afullmark OFFLINE  

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Posted 01 September 2017 - 02:21 PM

Where is it prettier than Emby?


Beholder's syndrome, I guess. Learning to love something new can be hard. 'Tis your baby, so I'm being careful in what I say. Overall general opinions are sweeping by nature: plex media sever front end 'feels' prettier to me. So sorry 😐

#14 Luke OFFLINE  

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Posted 01 September 2017 - 02:53 PM

Where exactly?



#15 afullmark OFFLINE  

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Posted 01 September 2017 - 03:44 PM

Where exactly?


The web app, editing of meta data and settings area. I just prefer the look that plex has. Although I didn't choose to try emby because of aesthetics it was for better dvr and live tv.
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#16 ebr ONLINE  

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Posted 01 September 2017 - 03:52 PM

Not sure if you've seen this but our interface can be made to look several different ways...



#17 Luke OFFLINE  

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Posted 01 September 2017 - 03:53 PM

The web app, editing of meta data and settings area. I just prefer the look that plex has. Although I didn't choose to try emby because of aesthetics it was for better dvr and live tv.

 

Is it just metadata and settings that you're talking about, or other areas of the web app? thanks.



#18 afullmark OFFLINE  

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Posted 01 September 2017 - 04:05 PM

Well, these are all just first impressions. The meta data edit area did take getting used too. Also along with how movie info is displayed, but I did mention my wish for 'directed by' and 'written by' etc in a separate post.

When you come from using plex for years and then change it is actually quite hard to list specifics, which is what would be useful to you. The whole experience is different although you wouldn't think so. It's nuanced. I'd have to really sit and think and then list things.

#19 x-cimo OFFLINE  

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Posted 01 September 2017 - 08:02 PM

Everytime you tune/change a channel emby runs ffprobe for a few sec to figure out which video and audio stream are available.

I could be wrong but at least for hdhomerun atsc tuner. I think this information remain static. Which means that the scan process (or a daily scan) might be able to figure out the available stream once. And then rely on that stored information next time it starts to play.

In my mind that would make live tv without transcoding super fast.

#20 denz OFFLINE  

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Posted 01 September 2017 - 10:06 PM

I think that is how other apps and devices can tune so quickly wmc for example is super quick if it is tunning to a sub channel it is instant my tv changes channels immediately my iptv box that connects with hdhomerun over dlna channel changes instant so there is definitely room for improvement.





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