ZoneMinder Forums

Hi all,

I am having an odd issue in Zoneminder with SV3C POE cameras. I have 5 of them. Every couple of days or so one of the cameras will show up with a wild streaking image



I have the cameras set to monitor and record in ZM at 10fps and the cameras are also set to output at only 7 fps at a resolution of 1920x1080 I have tried multiple framerates on both the camera side and ZM side to mitigate this issue, but to no avail.

I am running ZM 1.30.4 on Ubuntu 16.04 installed using the shell script for connors ppa found at the bottom of this page https://wiki.zoneminder.com/Ubuntu_Serv ... e_easy_way

I am running this using a Sabertooth 990fx mobo, AMD FX 8350 and 16GB of RAM. Ubuntu is the main and only OS installed and all it does is host zoneminder. I have a Ubiquiti 24port POE switch with plenty of bandwidth to handle the network traffic. I pulled high quality shielded Cat5 with inline surge protectors all properly grounded to each camera.

The cameras look fan-freakin-tastic for the price and work really well for a couple days then with no rhyme or reason the streaking appears on a random camera. All of the cameras have shown it in ZM at one point or another. No errors show up in the ZM log but of course it records alarms because of all of the motion in the image.

The really odd factor: When I open up the camera stream using VLC, while it is showing streaks in Zoneminder, the camera appears crystal clear in VLC but maintains streaks in ZM. The only way to make the streaks go away is to reset the Zoneminder service. Once the Zoneminder service restarts all streaking goes away.

The cameras were discoverd and configured using ONVIF. Is there anything that I can do to help this streaking go away? Thank you all so much in advance for any help that you may offer!

You have a common problem but it looks like you have good settings.

Except, blank out these as they are for local cameras:
Analysis FPS
7.00
Maximum FPS (?)
10.00
Alarm Maximum FPS (?)
10.00

Set the frame rate at the camera to 5 fps and lower the key frame interval (key frame sends a full image at the settings value otherwise only image changes are sent).
Check free space in /dev/shm If you are out of memory lower the camera resolution by half.

Make sure you do not have Linked Monitors cross linked which will put them into an endless loop.

Thank you very much! I have throttled the output from the cameras to 5 fps. When you say "lower" the iframe rate, you mean increase the value so it sends an iFrame less often? As an example, I have the iFrames set to 10 right now. Should I increase the value?

I have also deleted the values you mentions for analysis, maximum and alarm fps.

My dev/shm hovers right around 25% pretty consistently.

No monitors are linked with each other so I think we are good there.

I will let it run for a couple days and share my findings. Thanks!!!

Lower the iframe so it sends a full frame more often. The way you have it a full frame is sent every 2 seconds but play with it tillit works!

So I have the refresh at 5fps and iFrame at 5. I am still getting the streaking issue every couple of days on at least one camera. Is there anything else I can try?

> The really odd factor: When I open up the camera stream using VLC, while it is showing streaks in Zoneminder, the camera appears crystal clear in VLC but maintains streaks in ZM. The only way to make the streaks go away is to reset the Zoneminder service. Once the Zoneminder service restarts all streaking goes away.

To me, that suggests that the problem isn't in the camera, it's in the ZMC daemon attached to it -- unless VLC is looking at one of a camera's two encoders, and ZM the other one; you're using exactly the same connect URL in VLC as in ZM?

I have the same issue.

Cameras : SV3C
Distro : Ubuntu 16.04
ZM version : v1.30.4
Arch : x64 (AMD) details below
RAM : 16 Gb

Installed from Ubuntu repo.

It seems that there is something going on with ffmpeg, just taking a guess, because it is attached to the stream and recording the jpg files. VLC uses ffmpeg as well yet doesn't see the issue.

I also have an interesting log message (however I have set both chmod and chown liberally to try to stop the message):

2017-08-25 12:15:13.358345 web_php 1711 ERR Cannot write to content dirs('events','images'). Check that these exist and are owned by the web account user /usr/share/zoneminder/www/index.php 159



root@cam:/home/cam# cat /root/.bash_history | grep chown
chown -R www-data:www-data /var/cache/zoneminder

root@cam:/home/cam# ls -la /var/cache/zoneminder/
total 20
drwxr-xr-x 5 www-data www-data 4096 Jul 20 21:04 .
drwxr-xr-x 9 root root 4096 Aug 25 11:25 ..
drwxr-xr-x 6 www-data www-data 4096 Jul 27 19:05 events
drwxr-xr-x 2 www-data www-data 4096 May 9 12:54 images
drwxr-xr-x 2 root root 4096 May 9 12:54 temp

- I'm using the same connect url in both.
- I am not sure if the write to content dirs error is related. @jkeith248, do you also see that error?

Update
- The write to content dirs error had another root cause, which is solved.
- I still have streaking on this system.
- I have another ZoneMinder system running Debian and the same cameras at 720p, and it does not have streaking.
- Either a different version of ffmpeg, sysctl variables or resolution would remove the streaking.

It seems like I've found a solution. Move the color from 24-bit to 32-bit in zoneminder. See if that works for you. Also, please write back if it does... seems like this thread has gone dead.

So the color wasn't a perminante fix. The issue did happen again.

I moved to Debian9 (along with my other zoneminder machines) and the problem has been gone for 3 days.

There are different versions of ffmpeg on the two distros.

=======debian9 ffmpeg

root@zoneminder-deb8:~# ffmpeg
ffmpeg version 3.3.2 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 6.3.0 (Debian 6.3.0-18) 20170516

=====ubuntu ffmpeg

root@zoneminder-ubu16_04:~$ ffmpeg
ffmpeg version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609

I have two SV3C cameras and I too have the same streaking problem. Glad I found this thread.
I'm using ZoneMinder 1.30.4 on Ubuntu 16.04. I tried changing the colour depth from 24 to 32-bit, this didn't fix the issue. I also upgraded ffmpeg to 3.3.4-1 but unfortunately this has not helped either.
I have noticed that restarting zoneminder fixes the issue, and the problem only seems to affect the highres stream (not the lowres sub stream).

I have two SV3C cameras and I have the same problem.
$ ffmpeg
ffmpeg version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
I hope ...

Hi, I solved my problem.
Ubumtu server 16.04 LTS, Zoneminder 1.30.4
Zoneminder->option->image check OPT_FFMPEG , PATH_FFMPEG = /usr/bin/ffmpeg.
With sudo :

• cd /usr/lib/cgi-bin
  rm nph-zms (if old release zm was installed )
  rm zms (if old release zm was installed )
  ln -s /usr/lib/zoneminder/cgi-bin/nph-zms nph-zms
  ln -s /usr/lib/zoneminder/cgi-bin/zms zms
  service zoneminder restart

(Follows https://github.com/ZoneMinder/ZoneMinder/issues/1879)

SV3C 960p
Source:

• rtsp://username:password@ip_address:554/11 or 12
  TCP
  Color 32bit

General:

• Mode ffmpeg
  Analysis fps 5
  Max fps 7
  Allarm fps 5

Bye
Ferdinando

Same problem here - fendo, will try your bit, but would be good to narrow down further which of these adjustments actually solved the problem, as it won't be all of them.

Ben R