Libcamera python github. New libcamera based python library.
Libcamera python github sudo apt install -y libboost-dev sudo apt install -y libgnutls28-dev New libcamera based python library. Other Frequently Asked Questions The cam utility can be used for basic testing. Encoder interface tidied to make it easier to run a second encode "by hand" (example included). - dhaval-khatri1996/libcamera_python_example libcamera can't be installed or used from a virtual environment; picamera2 can't be installed with pip without first installing strange python libraries and then it cant be used in a virutal environment because it libcamera is not installed there. The camera_ros node depends on libcamera version 0. In practice, libcamera doesn't use this anyway, it only triggers this warning because it uses meson's python support to check if jinja2 etc. Controlling the camera module in Python is a typical project for any Raspberry Pi owner. sh Python 3. More than 100 million people use GitHub to discover, fork, and contribute to over 330 million projects. ROS noetic docker image with libcamera (tested on RPi5 with Bookworm as host) Contribute to raspberrypi/libcamera development by creating an account on GitHub. RaresAil / raspbian-csi-stream Star 1. See cam -h for more information I am trying to use the signal mode triggered from a python script on a headless Raspi. Some details: OS: Raspberry Pi OS, Bullseye, 64-bit Device: Raspberry Pi 4B Camera: Raspberry Pi Camera Module 3 It looks like @raffaeler GitHub is where people build software. import mmap import tom. Raspbian comes with the handy libcamera-apps package that duplicates the old raspistill and raspivid applications, with some added functionnality, like the possibility of adding postprocessing The cam utility can be used for basic testing. All cameras with their number can be shown with libcamera-hello. Topics Trending Install the OpenCV library on the Raspberry Pi using the terminal command "pip install opencv-python". The GUI is implemented using the lightweight framework FLTK Ultimately I'm hoping that we'll be able to use official libcamera packages, and official libcamera python bindings from pip, but I don't think there's anything like that available at the moment. In x86 To see what result codes to expect and stuff, # look at picamera2 on github, they do it the more proper way self. Arducam Demos – Python code on GitHub . It’s now a stable module, pre-installed on Raspberry Pi OS and ready to use on a fresh system Import and use of the above pacakge requires that libcamera to be built with the python package enabled. libcamera-hello --version rpicam-apps build: 49344f2a8d18 17-06-2024 (12:09:08) libcamera build: v0. picamera2 now fails to initialize. All 5 C++ 11 Python 5 TypeScript 2 C 1 CMake 1 HTML 1 JavaScript 1. 2. You can choose either packed or unpacked output. When trying to install picamera2 in a Docker image: FROM balenalib/raspberrypi4-64-python:3. This is why I always recommend updating libcamera and the Python bindings together using apt, we always keep those versions in step. How do I send a signal from the control script to libcamera-still? Saved searches Use saved searches to filter your results more quickly libcamera integration with chrome webrtc plus python wrapper - GitHub - nathanhome/libcamrtc: libcamera integration with chrome webrtc plus python wrapper GitHub is where people build software. string cimport string from libcpp. Everything works fine with 10bit, but as soon as I try rpicam-raw 640:400:8:P or set the bit_depth as 8bit in Python I start getting Broken Pipe errors. I'm kinda annoyed my search skills failed me and I didn't find that before, I was even searching the raspberrypi github repo's for libcamera and didn't spot this! The cam utility can be used for basic testing. All 30 C++ 13 Python 7 TypeScript 2 C 1 CMake 1 CSS 1 Dockerfile 1 HTML 1 JavaScript 1 Shell 1. As you're using Ubuntu I can only really make guesses at what the solutions might be. 1sec (10 fps) using automation in Python. 3. sudo apt install -y libboost-dev sudo apt install -y libgnutls28-dev Installl and run 'camera-streamer' for compatibility with libcamera-based cameras - GitHub - cp2004/OctoPrint-LibcameraStreamer: Installl and run 'camera-streamer' for compatibility with libcamera-based cameras The camera_ros node depends on libcamera version 0. 9 and 3. I'm having issues with multiple Pi Camera Module 3's where I'm getting the following errors: ERROR IPARPI cam_helper_imx708. But with the latest Raspberry Pi OS versions and the new camera library, there have been many changes. http raspberry-pi opencv flask stream camera server udp mjpeg python3 csi camera-module libcamera libcamera-vid Seeing that there is libcamera python bindings can we please get documentation on these python bindings? Looking at picamera 2 it hides away alot of complexity and I don't know how to call the libcamera python module(s) and methods by myself. It's --libdir but for py. On rasbian, this is accomplished by installing the libcamera package from apt. If you run Raspberry Pi OS Lite, begin by installing the following packages: sudo apt install -y python-pip This package works by building just the libcamera python bindings against your existing version of libcamera. It aims to utilize the Infinite-ISP as an image processing pipeline on the FPGA through Linux and leverage the libcamera framework for custom camera application development in user space. This is a GUI version of libcamera-apps. All 516 Python 289 C++ 37 JavaScript 30 C 17 Go 17 Shell 17 HTML 15 Jupyter Notebook 15 Java 11 TypeScript 11. Ensure you have any required software backed up. As things stand you have to get libcamera and python3-libcamera from apt, they aren't available anywhere else. But the easiest way to get started and try new things is to check the script examples on their GitHub. All 35 C++ 15 Python 8 Dockerfile 2 TypeScript 2 C 1 CMake 1 CSS 1 HTML 1 JavaScript 1 Nix 1. buffers(self. sudo apt install -y libboost-dev sudo apt install -y libgnutls28-dev Is libcamera compatible with Python 3. In case of problems, a detailed debug log can be obtained from libcamera by setting the LIBCAMERA_LOG_LEVELS Only build libcamera from scratch if you need custom behaviour or the latest features that have not yet reached apt repositories. stream) buffer = If you can use C++ instead of python, you can use my template from github where you have already integrated OpenCV with Libcamera. libcamera-vid. Contribute to waveshare/libcamera-install development by creating an account on GitHub. Using the Arducam Autofocus Camera with the new Raspberry Pi camera stack - libcamera. Tested with Raspberry Pi Zero 2 W and Camera Module 3. Plan and track work Code Review. List all available libcamera controls onto the console. I normally capture 10-15 images in 1 loop, then do a quick check and run We always recommend updating libcamera, rpicam-apps and Picamera2 from apt together, because we always ensure they work together. The cam utility can be used for basic testing. sudo apt install -y python-pip git python3-jinja2 First, install the following libcamera dependencies: . ; camera_frame_dim - Target dimensions [width, height] of the frame to be streamed by the camera. Reading the code of picamera2 isn't helping me learn. 11 installed from ppa:deadsnakes/ppa (due to problems with Python 3. )Alternatively you might find that sudo apt install python3-prctl fixes that dependency for you. Contribute to ArduCAM/Arducam_OBISP_MIPI_Camera_Module development by creating an account on GitHub. ; camera_info_rate - Frequency at which this node will log information This is our ip-cam script for a weathercam in Python3, picamera2-library based on libcamera software. This is the sample code I am using: GitHub is where people build software. I urgently need assistance as this issue is holding up multiple projects I have running. install_sources(), basically. py for the python script The libcamera-vid command to Only build libcamera from scratch if you need custom behaviour or the latest features that have not yet reached apt repositories. Hi, I am new using libcamera python and I wanted to know how I could set FPS for the camera. If you do indeed want to use libcamera is a C++ library for using camera hardware picamera2 is a Python library (which uses libcamera underneath). All reactions. 11. Issue description (regression) Picamera2 no longer functions in a python virtual environment. I compiled libcamera and libcamera-apps from source with python bindings enabled. http raspberry-pi opencv flask stream camera server udp mjpeg python3 csi camera-module libcamera I'd like to use libcamera very much like I used picamera (the original) mmalobjsee https://picamera. You can list the cameras detected on the system with cam -l, and capture ten frames from the first camera and save them to disk with cam -c 1 --capture=10 --file. g. add_buffer(self. In Raspbian Bullseye, the Raspberry Pi camera framework was completely rebased from MMAL to the libcamera library - thus breaking most of the previous camera dependencies. GitHub Copilot. If you just need CLI tools, I think it's easier to create bash/python wrappers of v4l2 commands imitating libcamera tools. Build For usage and build instructions, see the official Raspberry Pi documenation pages here. Code flask, libcamera-vid. stream, buffer) if Picamera2 is the libcamera-based replacement for Picamera which was a Python interface to the Raspberry Pi's legacy camera stack. To address this problem the Linux media community has very recently started collaboration with the industry to develop a camera stack that will be open-source-friendly while still protecting vendor core IP. Those work fine. In case of problems, a detailed debug log can be obtained from libcamera by setting the LIBCAMERA_LOG_LEVELS The only catch is that libcamera beneath is not so stable, so one version of libcamera is generally not compatible with another even though the Python API looks identical. GitHub is where people build software. from a legacy camera software stack based on proprietary Broadcom GPU code to an open-source stack based on libcamera. allocate(self. import libcamera somehow only works if I am under root directory (/) and I cannot import any submodules such as from libcamera import controls throws an ImportError: cannot import name 'controls' from 'libcamera' (unknown location). LCCV (libcamera bindings for OpenCV) is a small wrapper library that provides access to the Raspberry Pi camera in OpenCV. I think you are referring to the wrong module. python3 -m venv venv activate source . description : 'Select which pipeline handlers to build. 11), The cam utility can be used for basic testing. Note preview has a maximum shutter setting of 1 second. cpp:247 PDAF data in uns Describe the bug When running from a venv, libcamera is not available. request. Reload to refresh your session. Additional flags: --frame-counter (=0) - Every which frame to be sent to recognition. libcamera was born out of that collaboration and will offer modern camera support to Linux-based systems, including traditional Linux distributions, ChromeOS and Android. commands like rpicam-hello work fine. libcamera - Saved searches Use saved searches to filter your results more quickly Hello guys, companies like Waveshare sell different camera models, and libcamera-apps provide several configuration files (tuning file) to get the best picture. If you’re using the Raspberry Pi Camera Module, you need to enable the camera software in your Raspberry Pi in order to use it. New libcamera based python library. This version of the driver is deprecated on the new Bullseye system or later. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. libcamera - Something with your libcamera or kernel driver installation will be wrong if this does not work. Some Linux and ROS distributions provide binary libcamera packages. camera) self. In case of problems, a detailed debug log can be obtained from libcamera by setting the LIBCAMERA_LOG_LEVELS For most users this package is not the best approach to use libcamera in python - there are simpler ways. If you are able to use the system python, then running sudo apt install -y python3-libcamera will install the libcamera python bindings in the simplest way. Symbolic links are installed to allow users to keep using the old application names, but these will be deprecated soon. This approach will enable the We did originally want the libcamera API to be more permissive like this, but they (libcamera) were keen for applications to present a common API. . It provides visual, interactive access to some of the functionality of said suite of command line programs. read() $ sudo apt update --fix-missing $ sudo apt install -y libopenjp2-7-dev libhdf5-dev libatlas-base-dev python3-pip python3-h5py python3-opencv libqt5gui5 libqt5webkit5 libqt5test5 $ sudo pip3 install flask Check the app. fresh Raspbian 32bit bullseye installation, after running both apt-get dist-upgrade and apt-get upgrade; create a venv e. camera. Contribute to seanpm2001/RaspberryPi_PiCamera2 development by creating an account on GitHub. Did you try installing the libcap development headers like it suggestsed? (Probably something like sudo apt install libcap-dev. Current I am using a python script I found in the web to control the image capturing. You signed in with another tab or window. stdint cimport uint32_t, uint64_t from posix. 0+65-6ddd79b5. ; camera_refresh_rate - Frequency at which this node will try to grab new frames from camera. Manage code changes Discussions. See cam -h for more information about the cam tool. extension_module() and py. These applications and libraries have been renamed from libcamera-* to rpicam-*. Using pip install may encounter many issues (because picamera2 depends on libcamera). GitHub community articles Repositories. libcamera-raw only outputs these flat binary raw (Bayer) files, nothing else. Camera configuration will fail if an encoder is still running. stream) buffer = self. stream)[0] self. Contribute to raspberrypi/libcamera development by creating an account on GitHub. If your distribution does not provide a binary libcamera package, you have to compile libcamera from source either fork of rpicam-apps that builds upon the rpicam-raw app, offering cinema dng recording capabillities and integration with REDIS offering an abstract "API" like layer for custom integrations / controls. allocator. Related. Picamera2 also presents an easy to use Python API. Thanks in advance, Roger New libcamera based python library. Instant dev environments Issues. Python 3. 1 or later. All 3 HTML 1 Python 1 TypeScript 1. A python program that uses the raspberry pi camera , the picamera2 library, libcamera and opencv2 to detect motion and capture images of possible intruders - Wirstblase/RaspberryMotionDetectionSentry. And I would like to be able to rewrite my application with libcamera (in python) without actually New libcamera based python library. It works fine when not in venv. run(["libcamera-still", "-n", "-o&quo Skip to content. code:. In case of problems, a detailed debug log can be obtained from libcamera by setting the LIBCAMERA_LOG_LEVELS The Lite version of the OS doesn't include Qt or OpenGL, so it's still quite small (and those features of Picamera2 won't work unless you fetch those dependencies explicitly). If you run Raspberry Pi OS Lite, begin by installing the following packages:. - swenae/ipcam2 Only build libcamera from scratch if you need custom behaviour or the latest features that have not yet reached apt repositories. sudo apt install -y libboost-dev sudo apt install -y libgnutls28-dev Please only include one item/question/problem per issue! I'm trying to run a camera operating code import time from picamera2 import Picamera2, Preview picam2 = Picamera2() picam2. Code Issues Pull requests low latency rpi csi camera stream using opencv, flask, libcamera-vid. libcamera has now shipped its own "official" Python bindings, which is what this package is. Find and fix vulnerabilities Actions. I saw here an example how to load one parameter of a . You can find documentation here which should help you to get started. 04 (focal) Adafruit Industries - Adafruit Github Circuit Python modules enabled indi-allsky to quickly facilitate using many electronics sensors; Picamera2 is the libcamera-based replacement for Picamera which was a Python interface to the Raspberry Pi's legacy camera stack. 11 is installed on a Raspberry (Bullseye) with altinstall flag, so, both Python 3. Anyway, we shall be looking into it. I had many issues installing picamera2 (complaining about pyqt5) while it was in I'm interested in building a simple C# application to capture single image frames on Raspberry Pi. apt show python3-libcamera Package: python3-libcamera Version: 0. allocator = FrameBufferAllocator(self. Article Name. Navigation Menu Toggle navigation Sign up for a free GitHub account to open an issue and contact its maintainers and the community. memory cimport unique_ptr, shared_ptr from libcpp cimport bool from libc. I've confirmed that it won't work on a clean Pi OS 64-bit Updated GScrop allows to pass optional shutter time (in microseconds) after video length (in milliseconds), to be used for libcamera-vid video capturing. I can create virtual env, install picamera2 from pip (pip3. libcamera - New libcamera based python library. I also run sudo apt install -y python3-libcamera python3-kms++ sudo apt install -y python3-pyqt5 python3-prctl libatlas-base-dev ffmpeg python3-pip pip3 install nu This is a small suite of libcamera-based apps that aim to copy the functionality of the existing "raspicam" apps. I suspect that this is because the pylibcamera PyPI package has not been updated to reflect the changes in libcamera. http raspberry-pi opencv The cam utility can be used for basic testing. You signed out in another tab or window. All 29 C++ 13 Python 7 TypeScript 2 C 1 CMake 1 Dockerfile 1 HTML 1 JavaScript 1 Shell 1. h ": ctypedef dev_t; cdef I am using an pi hq camera for astrophotography and EAA. All 34 C++ 15 Python 7 Dockerfile 2 TypeScript 2 C 1 CMake 1 CSS 1 HTML 1 JavaScript 1 Nix 1. Collaborate outside of code Code Search. 11 ? The Python version 3. If this is set to "auto", all the pipelines applicable to the target architecture will be built. create_request() self. See cam -h for more information GitHub is where people build software. We will take images, save and stream video, and test quality. sudo apt install -y libboost-dev sudo apt install -y libgnutls28-dev Hi all, situation: I build latest libcam and rpicam-apps from scratch. misc from cython import NULL, size_t from libcpp. vector cimport vector from libcpp. Raspberry Pi Autofocus Camera & libcamera. Topics Trending Collections Enterprise The Infinite-ISP Linux-Based Camera Stack is an open-source platform with the primary goal of providing a complete stack for camera software development. http raspberry-pi opencv flask stream camera server udp mjpeg python3 csi camera-module libcamera libcamera-vid Picamera2 is the libcamera-based replacement for Picamera which was a Python interface to the Raspberry Pi's legacy camera stack. However, the python binding is not working. Sign up for GitHub camera_controls are converted to native Python types (tuples, not libcamera. You switched accounts on another tab or window. Install INDI core library. JetCam is an easy to use Python camera interface for NVIDIA Jetson. Lillifee / raspiCam Star 82. The documentation states that this option is for the directory that libcamera should install its own python modules. 0+rpt20240617-1. Samples/ python. The GitHub repo for picamera2 includes alternate instructions for installing "without GUI packages" such as OpenGL and Qt, which is essential for running picamera2 in any version of Raspberry Pi Lite OS. In case of problems, a detailed debug log can be obtained from libcamera by setting the LIBCAMERA_LOG_LEVELS GitHub is where people build software. /venv/bin/activate; install build dependencies: sudo apt-get install -y libpcap-dev preview uses libcamera-vid (so may not be as sharp as captured stills), stills libcamera-still, videos libcamera-vid, timelapses depends on timings and settings, libcamera-still, -vid or -raw. Those can be used with --controls-tf, --tuning_filter: Set a tuning filter file name. All 24 C++ 11 Python 5 TypeScript 2 C 1 CMake 1 Dockerfile 1 HTML 1 JavaScript 1. sudo apt install -y libboost-dev sudo apt install -y libgnutls28-dev Saved searches Use saved searches to filter your results more quickly New libcamera based python library. All 29 C++ 12 Python 7 TypeScript 2 C 1 CMake 1 Dockerfile 1 HTML 1 JavaScript 1 Shell 1. To Reproduce. In the Desktop environment, go to the Raspberry Pi Configuration window under the Preferences menu, open the Interfaces tab and enable the Camera. Rather than capturing the webcam using OpenCV or Picamera2, I want to take pictures using libcamera-hello, and then pass it to the processing function, every 0. 11-bullseye WORKDIR /example RUN apt update && apt upgrade && apt install -y python3-picamera2 --no-install-recommends COPY . Name: picamera2 Version: 0. The idea is to warm up the camera and then call for capture at the desired time. I think they were probably right in that having everyone go off and do their own thing would have been really bad, but it does leave this idea of "tunnelling" application specific commands through in an awkward place. Summary. -n, --camera_num: Camera number to be used. It does this by cloning the libcamera repository and checking out the specified revision. QTGL) preview_config = picam2. Check your package manager for libcamera and rosdep resolve libcamera to see if binary packages are available. request: Request = self. You can use libcamera to rotate the picture. Works with various USB and CSI cameras using Jetson's Accelerated GStreamer Plugins Easily read images as numpy arrays with image = camera. libcamera - Making complex cameras easy. To see what result codes to expect and stuff, # look at picamera2 on github, they do it the more proper way self. At your own risk !!. A single-camera driver for all is the main goal of Jetvariety project, the user doesn't need to develop their own camera driver for Nvidia Jetson boards and even more, user can switch between different Arducam cameras without switching camera driver. Setup instructions for OctoPrint on Bullseye, using libcamera / Picamera2 to connect to Raspberry Pi Camera Module 3 - ctruxaw/OctoPrintSetup I have been getting issues when trying to get the output of the camera working in 8 bit mode at 640:400 resolution, both through Python and the command line. http raspberry-pi opencv flask stream camera server udp mjpeg python3 csi camera-module libcamera The canonical way to access libcamera in Python is through picamera2. Write better code with AI Security. All 22 C++ 10 Python 5 TypeScript 2 C 1 CMake 1 HTML 1 JavaScript 1. Warning. Rectangle objects). I get no other errors in my logs New libcamera based python library. http raspberry-pi opencv flask stream camera server udp mjpeg python3 csi camera-module libcamera GitHub is where people build software. The root of the problem is that libcamera doesn't have a stable API, though I think For the python picamera2 package, it is best to use the python3-picamera2 package within Pi OS Bookworm. 11 works together. 12 and pyindi-client) Ubuntu 22. Since Raspberry Pi OS Bullseye, the picamera2 library is the default method to control the camera module with Python on a Raspberry Pi. Contribute to yakorch/zoomed_picamera2 development by creating an account on GitHub. are GitHub is where people build software. -tfd, --tuning_filter_dir: Set the directory to look for tuning filters. However I cannot really import libcamera into my python. unistd cimport close, read, off_t cdef extern from " sys/types. Right now I am simply calling libcamera-sill via a subprocess from the mentioned python script. python -m venv --system-site-packages venv source venv/bin/activate python >>> impor GitHub community articles Repositories. Automate any workflow Codespaces. We've migrated our own Picamera2 code now to use this new "official" version, They code in the GitHub repo you linked to uses import picamera2 not import libcamera. This is integrated version of libcamera-apps with OpenCV to apply computer vision in background during streaming. 18 Summary: The libcamera-based Python interface to Raspberry Pi cameras, based on the original Compile libcamera with build_libcamera. re Hello! I know picamera2 exists. Warning These applications and libraries have been renamed from libcamera-* to rpicam-* . We've migrated our own Picamera2 code now to use this new "official" version, which is actually very close to what we were using previously. In case of problems, a detailed debug log can be obtained from libcamera by setting the LIBCAMERA_LOG_LEVELS Remote access using the Terminal/SSH It's recommended you take a look at the resources here as you will need to use Terminal and some basic commands to install BerryCam and run the Python script. Only build libcamera from scratch if you need custom behaviour or the latest features that have not yet reached apt repositories. You can force the use of a particular raw sensor mode with the --mode parameter. Networking Setup: Enable Wireless Access Point The command libcamera-hello will print a message to the console indicating that the libcamera library is working correctly, and then The cam utility can be used for basic testing. Find more, search less This is a small suite of libcamera-based applications to drive the cameras on a Raspberry Pi platform. I tried to look through the code but I was unable to find anything. http raspberry-pi opencv flask stream camera server udp mjpeg python3 csi camera After install Raspberry Pi OS updates. Contribute to raspberrypi/picamera2 development by creating an account on GitHub. . CameraNode offers the following set of camera configuration parameters:. Contribute to seasonqiu/picamera2_mimo development by creating an account on GitHub. All 27 C++ 11 Python 8 TypeScript 2 C 1 CMake 1 Dockerfile 1 HTML 1 JavaScript 1. Check your package manager for libcamera and rosdep resolve libcamera to see if binary packages Hey all, Describe the bug we running Libcamera-still or Libcamera-jpeg from python via subprocess in 10 seconds intervals : subprocess. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. The To make this process easier I think we would need the libcamera python bindings to be installable via pip, but I'm not really sure. creat Hi, it looks like the prctl dependency is causing trouble. Only build libcamera from scratch if you need custom behaviour or the latest features that have not yet reached apt repositories. This won't work since the --system-site-packages adds the packages from the python version that is used inside virtualenv This solved #341 since venv package creates only isolated packages and still uses system python virtualenv on the other hand creates an isolated packages and python environment. WARNING: This is still an early version of the project, so expect to have some bugs. Picamera2 was working in Why do you need libcamera by the way? I mean, obviously it's the default way to control camera on rpi, but it will take A LOT of time to rewrite their IQ algorithms to work on rkisp3. start_preview(Preview. In case of problems, a detailed debug log can be obtained from libcamera by setting the LIBCAMERA_LOG_LEVELS import libcamera ModuleNotFoundError: No module named 'libcamera' I don't know where libcamera is located, but I think it is on the system, because its tools are working correctly (for example, libcamera-hello shows the preview). A sample example of using libcamera to read frames from camera and display them. json file : https://gi Saved searches Use saved searches to filter your results more quickly Jetvariety is a Nvidia Jetson platform V4L2 kernel camera driver framework which can support any MIPI cameras Arducam provides. It working pretty well (image analyzing is on Opencv is used to diplay the image but you may use any library you see fit as the image_array is numpy The cam utility can be used for basic testing. All 5 C++ 11 Python 5 TypeScript 2 C 1 CMake 1 Dockerfile 1 HTML 1 JavaScript 1. camera_path - Path to a video device. If there is no pre-compiled package for your hardware you will need to compile it by yourself. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. 0 New libcamera based python library. raspberry pi4 with 64 bit image installed with latest sw. qbmduexe jdcz kpvtn kklsd slfbe zpt twcx demx dgnz esn