(2012-12-21, 22:13)janbar Wrote: Hi,

Probably you have a network issue. But also since we have limited the buffer size request depending of the backend response to avoid any break of show, this probem could occur. For me HD use 35~45 mb/s. Also you use a remote storage, so you need at least twice of the bandwidth. That means you need 70~100 mb/s. This is the reason why i said in a previous post you should have a gigabit network to manage these cases.
The best thing should be to use two different networks (so two ethernet cards on the backend) , one for the storage and the other for the remote client.
I will make a branch with an algorithm less aggressive for the buffer size. You could try it.
br.

(2012-12-21, 22:35)martyg7 Wrote: [quote='janbar' pid='1273151' dateline='1356120802']

Just to clarify, I have a single server with all my disk space built in.
I do not have a separate NAS box for my video captures.
(I understand how a separate LAN segment would be a good idea if that were the case)

I have tested with 2 separate targets (Win/Linux laptop and RPi card) connected to server via GigE.

Since I (only) see this issue using RPi PVR/Myth, and not RPi Videos/NFS, I'm pretty sure it's not my network.
Since I do not see the issue on Laptop/Win/XBMC or Laptop/Linux/Myth-frontend, I assume my issue is specific to RPi.

I thought it might be resource scheduling on the server side (mythbackend process)
but not being able to duplicate on Laptop/Linux with mythfrontend kind of eliminated that track for me.
(I did play some with process scheduling for mythbackend on the server, to no avail)

I am at your disposal for testing any fixes. Thanks for the prompt response!

EDIT: Oh, BTW my RPi is the 256M version, if that makes a difference.

(2012-12-21, 19:49)martyg7 Wrote: I am tracking a persistent problem with MPEG2 playback on RPi.
This issue is specific to playback via the PVR interface.
I am using the cMyth plugin. Backend is MythTV 0.26 Debian over GigE.

When playing back a HD recording, playback pauses/rebuffers randomly.
Frequency of occurence is once about every 1-2 minutes.
Playback is through the PVR interface using the cMyth plugin.
All my feeds are captured using a HD Homerun on FIOS TV.

I can play the same files through the XBMC "Videos" interface with no issues.
(I have my MythTV captures cross-mounted via NFS)

I have reproduced this issue on OpenELEC and RaspBMC.

I cannot duplicate this issue using VLC on windows, over SMB share.
I cannot duplicate this issue using XBMC Frodo RC2 on Windows.
I cannot duplicate this issue using Myth frontend on my Linux laptop.

This only occurs on high bitrate (~18Mb/s) HD recordings.
I cannot reproduce on lower bitrate (~2.5Mb/s) SD recordings.

NOTE this issue is unrelated to the other playback issue documented in several
other threads, where a hard pause occurs at commercial breaks in recordings.

As far as I can tell, this is NOT a recent regression.
I still see this problem as of latest OpenELEC nightly (r12735)
which includes the latest cMyth plugin (v.1.6.6)

Sorry if this already being worked on, but I have spent a lot of time trying to
figure out this issue, and wanted to make sure this was written down.

Happy holidays to all the developers and contributors!

(2012-12-22, 18:32)janbar Wrote: I did'nt see any buffering ! Also my backend runs on intel D425, so a small CPU.

(2012-12-23, 16:06)martyg7 Wrote: Turns out I had a screwy mythbackend process on my server.
I was watching it yesterday, and noticed the CPU consumption was out of whack.
I was seeing about 10% at idle, and 70% of a 2.8GHz core with one file playing back.
(This is without any transcode/commflag jobs or anything else running on the machine)
Seeing 70% << 100%, I didn't think much of it. ;-)

(2012-12-21, 01:39)janbar Wrote: Hi, please can you post the log between 23:10:00 and 23:14:00 ?
I need to view result of events "LIVETV_WATCH" and "DONE_RECORDING". Thanks.

(2012-12-21, 21:14)janbar Wrote:

(2012-12-21, 18:30)guitarguy987 Wrote:

(2012-12-20, 04:12)Calabraun Wrote: I am having this exact same issue, with choppy SD video and HD is fine, using mythtv back end. Using MythTV .25 and I have a PVR-500 for SD. Did you happen to figure this out?

I did not figure this out yet. I assume it's a buffering issue, but am not sure.

Perhaps because I didn't attach a log file on my original post. I am still using a quite old version of the Add-On on my main TV that is working well enough for me...

Can anyone give us any insight into this? Is this a known problem? Would you like me to attach some log files?

Hi,
Yes i need log to see what happen. But first try with mythfrontend to check you haven't the issue with it. Also what is the version of the old addon you use without any problem. That could be help me. Thanks.
Edit: if you have the git commit , it would be nice

(2012-12-24, 17:42)guitarguy987 Wrote:

(2012-12-21, 21:14)janbar Wrote:

(2012-12-21, 18:30)guitarguy987 Wrote: I did not figure this out yet. I assume it's a buffering issue, but am not sure.

Perhaps because I didn't attach a log file on my original post. I am still using a quite old version of the Add-On on my main TV that is working well enough for me...

Can anyone give us any insight into this? Is this a known problem? Would you like me to attach some log files?

Hi,
Yes i need log to see what happen. But first try with mythfrontend to check you haven't the issue with it. Also what is the version of the old addon you use without any problem. That could be help me. Thanks.
Edit: if you have the git commit , it would be nice

Hi janbar,

I have just tested with Mythfrontend, and the problem does not occur. Playback of the analog SD channels is smooth.

The version I have working is very old (sorry, I'm not super familiar with git, so I'll give you the info I have on that frontend machine, not even sure if it will help, I realize it's not even running Frodo, I'm still on Eden...):
I followed the directions on page 83 of this thread:

git clone https://github.com/tsp/xbmc.git
cd xbmc
git checkout Eden-pvr

git log gives me this as the latest:
commit ca07c7de3de22d6d1243eb927ddf9fdde0dd3b4d
Author: Tonny Petersen <tsp@person.dk>
Date: Sun Jun 24 15:57:46 2012 +0200

FIX: click on recording folder would play all files instead of showing content

This is working without the glitches for me, but I do have to tune several times to the analog channels because of the ReadLiveStream: Read 0 Bytes! problem. Anyways, hope this is useful info...

Glitchy version:

XBMC 12.0-RC2 Git:8e45737 (Compiled: Dec 20 2012)

Pastebin link to the log

Let me know if you need any more info, I'll do what I can.

Thanks and happy holidays!

(2012-12-24, 17:56)c420 Wrote:

(2012-12-24, 17:42)guitarguy987 Wrote:

(2012-12-21, 21:14)janbar Wrote: Hi,
Yes i need log to see what happen. But first try with mythfrontend to check you haven't the issue with it. Also what is the version of the old addon you use without any problem. That could be help me. Thanks.
Edit: if you have the git commit , it would be nice

Hi janbar,

I have just tested with Mythfrontend, and the problem does not occur. Playback of the analog SD channels is smooth.

The version I have working is very old (sorry, I'm not super familiar with git, so I'll give you the info I have on that frontend machine, not even sure if it will help, I realize it's not even running Frodo, I'm still on Eden...):
I followed the directions on page 83 of this thread:

git clone https://github.com/tsp/xbmc.git
cd xbmc
git checkout Eden-pvr

git log gives me this as the latest:
commit ca07c7de3de22d6d1243eb927ddf9fdde0dd3b4d
Author: Tonny Petersen <tsp@person.dk>
Date: Sun Jun 24 15:57:46 2012 +0200

FIX: click on recording folder would play all files instead of showing content

This is working without the glitches for me, but I do have to tune several times to the analog channels because of the ReadLiveStream: Read 0 Bytes! problem. Anyways, hope this is useful info...

Glitchy version:

XBMC 12.0-RC2 Git:8e45737 (Compiled: Dec 20 2012)

Pastebin link to the log

Let me know if you need any more info, I'll do what I can.

Thanks and happy holidays!

tsp's is the old addon, you should use fetzerch's git instead.
This page will tell you how to build an upto date version
http://wiki.xbmc.org/index.php?title=PVR/Backend/MythTV/BuildFromSource

(2012-12-23, 19:13)bedouin Wrote:

(2012-12-21, 01:39)janbar Wrote: Hi, please can you post the log between 23:10:00 and 23:14:00 ?
I need to view result of events "LIVETV_WATCH" and "DONE_RECORDING". Thanks.

Sorry for the delay, our 2nd baby was born on Friday, slightly distracted...here's a new log of the switchover-freeze, this time the programs switched over at 18:04.

xbmc201212231804.log

(2012-12-23, 19:13)bedouin Wrote:

(2012-12-21, 01:39)janbar Wrote: Hi, please can you post the log between 23:10:00 and 23:14:00 ?
I need to view result of events "LIVETV_WATCH" and "DONE_RECORDING". Thanks.

Sorry for the delay, our 2nd baby was born on Friday, slightly distracted...here's a new log of the switchover-freeze, this time the programs switched over at 18:04.

xbmc201212231804.log

(2012-12-24, 19:32)guitarguy987 Wrote:

(2012-12-24, 17:56)c420 Wrote:

(2012-12-24, 17:42)guitarguy987 Wrote: Hi janbar,

I have just tested with Mythfrontend, and the problem does not occur. Playback of the analog SD channels is smooth.

The version I have working is very old (sorry, I'm not super familiar with git, so I'll give you the info I have on that frontend machine, not even sure if it will help, I realize it's not even running Frodo, I'm still on Eden...):
I followed the directions on page 83 of this thread:

git clone https://github.com/tsp/xbmc.git
cd xbmc
git checkout Eden-pvr

git log gives me this as the latest:
commit ca07c7de3de22d6d1243eb927ddf9fdde0dd3b4d
Author: Tonny Petersen <tsp@person.dk>
Date: Sun Jun 24 15:57:46 2012 +0200

FIX: click on recording folder would play all files instead of showing content

This is working without the glitches for me, but I do have to tune several times to the analog channels because of the ReadLiveStream: Read 0 Bytes! problem. Anyways, hope this is useful info...

Glitchy version:

XBMC 12.0-RC2 Git:8e45737 (Compiled: Dec 20 2012)

Pastebin link to the log

Let me know if you need any more info, I'll do what I can.

Thanks and happy holidays!

tsp's is the old addon, you should use fetzerch's git instead.
This page will tell you how to build an upto date version
http://wiki.xbmc.org/index.php?title=PVR/Backend/MythTV/BuildFromSource

Yup, I have tested fetzerch's on another frontend, and that's the add-on that I'm having the analog SD glitches on. If it wasn't for that, I'd be using it on my main frontend. tsp's is working well enough for the moment, besides having to tune to the SD channels several times.

Anyways, my Raspberry Pi is on the truck for delivery right now, so I'll probably be testing Openelec sooner than later!

(2012-12-23, 17:02)richardk Wrote: If you Google "mythbackend high cpu" you'll find some reports of this, but most relate to a leap second that was inserted last summer, so not the same problem.

One post recommended " If you open MythTVBackend -> Capture Cards -> DVB card -> Record options and then untick the "Actively Scan for EIT Data" box, it should work." I'm not sure if this is relevant, but I have tried it and will report back.

(2012-12-23, 19:13)bedouin Wrote:

(2012-12-21, 01:39)janbar Wrote: Hi, please can you post the log between 23:10:00 and 23:14:00 ?
I need to view result of events "LIVETV_WATCH" and "DONE_RECORDING". Thanks.

Sorry for the delay, our 2nd baby was born on Friday, slightly distracted...here's a new log of the switchover-freeze, this time the programs switched over at 18:04.

xbmc201212231804.log