# \#python **URL:** https://forum.commonvisionblox.com/tag/python/70.md [Latest](https://forum.commonvisionblox.com/latest.md) · [Categories](https://forum.commonvisionblox.com/categories.md) · [Tags](https://forum.commonvisionblox.com/tags.md) --- ## [Inconsistency between Writeable and Writable in CVB](https://forum.commonvisionblox.com/t/inconsistency-between-writeable-and-writable-in-cvb/2468)
**Author:** [@can](https://forum.commonvisionblox.com/u/can)\ **Replies:** 1\ **Last updated:** [April 15, 2026, 7:58am UTC](https://forum.commonvisionblox.com/t/inconsistency-between-writeable-and-writable-in-cvb/2468 "2026-04-15T07:58:42Z")
Hello, while looking through the current CVB installation, I noticed an inconsistency in the naming around Writeable vs Writable. For example: cvb/genapi/\_decl/decl\_node.hpp exposes IsWriteable() cvb/gevserver/\_d… --- ## [Camera access / Chunk data access with IDS camera](https://forum.commonvisionblox.com/t/camera-access-chunk-data-access-with-ids-camera/2437)
**Author:** [@mmuhieddine](https://forum.commonvisionblox.com/u/mmuhieddine)\ **Replies:** 4\ **Last updated:** [August 5, 2025, 8:04am UTC](https://forum.commonvisionblox.com/t/camera-access-chunk-data-access-with-ids-camera/2437 "2025-08-05T08:04:46Z")
Hello ! I’m trying to update our software to support IDS camera (GV-527xCP-C). We already support Flir-Teledyne and Lucid Vision cameras. We are using CVB 14.00.008. (We also tried CVB 14.01.006) on Nvidia Jetson. IDS… --- ## [Basic usage of Intel RealSense cameras with CVB](https://forum.commonvisionblox.com/t/basic-usage-of-intel-realsense-cameras-with-cvb/883)
**Author:** [@s-woe](https://forum.commonvisionblox.com/u/s-woe)\ **Replies:** 25\ **Last updated:** [May 16, 2025, 7:36am UTC](https://forum.commonvisionblox.com/t/basic-usage-of-intel-realsense-cameras-with-cvb/883 "2025-05-16T07:36:57Z")
This guide is suitable for the Intel® RealSense™ cameras D415/D435/D435I. It describes the steps starting from driver installation/configuration to basic sample programs. --- ## [How to Fix "TL Call Failed" Error When Running Python Code?](https://forum.commonvisionblox.com/t/how-to-fix-tl-call-failed-error-when-running-python-code/2357)
**Author:** [@Mo212](https://forum.commonvisionblox.com/u/Mo212)\ **Replies:** 1\ **Last updated:** [February 11, 2025, 2:47pm UTC](https://forum.commonvisionblox.com/t/how-to-fix-tl-call-failed-error-when-running-python-code/2357 "2025-02-11T14:47:23Z")
Hello everyone! I’m new to the software and trying to run my program using Python, but I keep encountering the following error from the start: device = cvb.DeviceFactory.open(cvb.install\_path() + "Drivers/GenICam.vin")… --- ## [Macro in the image](https://forum.commonvisionblox.com/t/macro-in-the-image/2350)
**Author:** [@Paulo](https://forum.commonvisionblox.com/u/Paulo)\ **Replies:** 2\ **Last updated:** [January 23, 2025, 9:36am UTC](https://forum.commonvisionblox.com/t/macro-in-the-image/2350 "2025-01-23T09:36:23Z")
Hi guys. I’m acquiring images from the camera using python. However, when I capture the frame, the image comes back with the CVB symbol, can this be removed? --- ## [Error when streaming from camera](https://forum.commonvisionblox.com/t/error-when-streaming-from-camera/2337)
**Author:** [@Paulo](https://forum.commonvisionblox.com/u/Paulo)\ **Replies:** 5\ **Last updated:** [January 10, 2025, 9:02am UTC](https://forum.commonvisionblox.com/t/error-when-streaming-from-camera/2337 "2025-01-10T09:02:14Z")
I’m using a DALSA Liena 4K. I’m using CVB version 14.01.002, with Python 3.11. I’m trying to stream the camera but I can’t get the images. When I use the GenICam.vin driver I get the following error “ValueError: no con… --- ## [Problem connecting to teledyne dalsa linea line scan camera](https://forum.commonvisionblox.com/t/problem-connecting-to-teledyne-dalsa-linea-line-scan-camera/2255)
**Author:** [@JDP](https://forum.commonvisionblox.com/u/JDP)\ **Replies:** 3\ **Last updated:** [November 5, 2024, 7:36am UTC](https://forum.commonvisionblox.com/t/problem-connecting-to-teledyne-dalsa-linea-line-scan-camera/2255 "2024-11-05T07:36:21Z")
I have a linea camera, model# LA\_HM\_16K07A\_00\_R, with a frame grabber card Xtium-CLHS PX8 board, model number OR-Y8S0-XPX70. Using sapera CamExpert version 8.73.00.2253. I can acquire an image from cam expert so I know … --- ## [C-API call failed](https://forum.commonvisionblox.com/t/c-api-call-failed/2154)
**Author:** [@shrutarv](https://forum.commonvisionblox.com/u/shrutarv)\ **Replies:** 1\ **Last updated:** [May 6, 2024, 11:54am UTC](https://forum.commonvisionblox.com/t/c-api-call-failed/2154 "2024-05-06T11:54:51Z")
Hello, I am using Ubuntu 20.04 and python3. My goal is to get data from the camera and publish it to a ROS topic. I have installed cvb and GigE-V-Framework\_x86\_2.20.0.0182 successfully. When executing the command ./Gige… --- ## [Simple python script to poll or update nodes](https://forum.commonvisionblox.com/t/simple-python-script-to-poll-or-update-nodes/2116)
**Author:** [@adam.honeybell](https://forum.commonvisionblox.com/u/adam.honeybell)\ **Replies:** 1\ **Last updated:** [February 14, 2024, 1:29pm UTC](https://forum.commonvisionblox.com/t/simple-python-script-to-poll-or-update-nodes/2116 "2024-02-14T13:29:10Z")
My company make lighting controllers and support various registers for controlling behaviour. I need a way to periodically read the data, but I don’t seem to be able to do so after the first connection and read. What sho… --- ## [Error when using multistreams, stream.engine\_start](https://forum.commonvisionblox.com/t/error-when-using-multistreams-stream-engine-start/1988)
**Author:** [@Aaron00](https://forum.commonvisionblox.com/u/Aaron00)\ **Replies:** 14\ **Last updated:** [July 26, 2023, 10:55am UTC](https://forum.commonvisionblox.com/t/error-when-using-multistreams-stream-engine-start/1988 "2023-07-26T10:55:23Z")
I am receiving this error when trying to get multiple streams. An example of the code I am using is below; import cvb def discovery(): devices = cvb.DeviceFactory.discover\_from\_root(cvb.DiscoverFlags.IgnoreVins… --- ## [Error in CVB Logging GUI while Image Acquisition works as aspected](https://forum.commonvisionblox.com/t/error-in-cvb-logging-gui-while-image-acquisition-works-as-aspected/1948)
**Author:** [@sebwr](https://forum.commonvisionblox.com/u/sebwr)\ **Replies:** 17\ **Last updated:** [May 24, 2023, 10:03am UTC](https://forum.commonvisionblox.com/t/error-in-cvb-logging-gui-while-image-acquisition-works-as-aspected/1948 "2023-05-24T10:03:11Z")
Hi, I am using the following setup: Ubuntu 22.04 Python 3.11 CVB 14.00.004 When capturing images via Python, each image generates an error log entry in the CVB Logging GUI. But the image capture works perfectly for … --- ## [Unable to buil or execute the QML samples](https://forum.commonvisionblox.com/t/unable-to-buil-or-execute-the-qml-samples/1920)
**Author:** [@Odontoglyfida](https://forum.commonvisionblox.com/u/Odontoglyfida)\ **Replies:** 2\ **Last updated:** [February 23, 2023, 11:38am UTC](https://forum.commonvisionblox.com/t/unable-to-buil-or-execute-the-qml-samples/1920 "2023-02-23T11:38:28Z")
I am not able to build or run any of the QML base samples in the tutorial. I tried the C++ samples as well as the python samples. For python I can not get the PySide2 package required to execute the sample. --- ## [Issues with software trigger and 12 bits mono image](https://forum.commonvisionblox.com/t/issues-with-software-trigger-and-12-bits-mono-image/1836)
**Author:** [@dave](https://forum.commonvisionblox.com/u/dave)\ **Replies:** 5\ **Last updated:** [January 23, 2023, 8:32am UTC](https://forum.commonvisionblox.com/t/issues-with-software-trigger-and-12-bits-mono-image/1836 "2023-01-23T08:32:04Z")
Hi, I’m trying to acquire 12 bits mono images via a software triggering over a VC-25M10G-M41I0 camera. I am able to acquire a single image, even though the ring buffer does not increase, but this image is also an 8bits … --- ## [HSI images format change](https://forum.commonvisionblox.com/t/hsi-images-format-change/1830)
**Author:** [@hyper\_imager](https://forum.commonvisionblox.com/u/hyper_imager)\ **Replies:** 0\ **Last updated:** [November 14, 2022, 5:54pm UTC](https://forum.commonvisionblox.com/t/hsi-images-format-change/1830 "2022-11-14T17:54:35Z")
Hello everyone, could somebody kindly assist me? I have a hyperspectral image in tiff format that I’d like to convert to. lan format in python. --- ## [CVB Python Multi-Camera Acquisition - Software Trigger](https://forum.commonvisionblox.com/t/cvb-python-multi-camera-acquisition-software-trigger/1782)
**Author:** [@alexm](https://forum.commonvisionblox.com/u/alexm)\ **Replies:** 24\ **Last updated:** [November 14, 2022, 8:37am UTC](https://forum.commonvisionblox.com/t/cvb-python-multi-camera-acquisition-software-trigger/1782 "2022-11-14T08:37:09Z")
Hi, I’m looking for some help with acquiring images using CVB Python from multiple cameras when using a software trigger. Hardware, 2 USB cameras: Alvium 1800U-158C-CH-C There is no hardware trigger, and I’d like to … --- ## [Correct approach for overlays using CVBpy](https://forum.commonvisionblox.com/t/correct-approach-for-overlays-using-cvbpy/1802)
**Author:** [@drbsg](https://forum.commonvisionblox.com/u/drbsg)\ **Replies:** 3\ **Last updated:** [October 6, 2022, 12:44pm UTC](https://forum.commonvisionblox.com/t/correct-approach-for-overlays-using-cvbpy/1802 "2022-10-06T12:44:31Z")
I am porting an application from using the CVImage, CVDisplay and CVGrabber ActiveX controls to CVBpy. We make use of several of the overlay plugins for plain and rotatable rectangles, and cross-hairs, and I would like t… --- ## [CVB Python Multi-Camera Acquisition](https://forum.commonvisionblox.com/t/cvb-python-multi-camera-acquisition/1781)
**Author:** [@alexm](https://forum.commonvisionblox.com/u/alexm)\ **Replies:** 14\ **Last updated:** [September 21, 2022, 10:29am UTC](https://forum.commonvisionblox.com/t/cvb-python-multi-camera-acquisition/1781 "2022-09-21T10:29:24Z")
Hi, I’m looking for some help with acquiring images using CVB Python from multiple cameras. Hardware, 2 USB cameras: Alvium 1800U-158C-CH-C There is no hardware trigger, and I’d like to keep it this way. I accept th… --- ## [Camera connection state changed event usage](https://forum.commonvisionblox.com/t/camera-connection-state-changed-event-usage/1774)
**Author:** [@Fatemeh](https://forum.commonvisionblox.com/u/Fatemeh)\ **Replies:** 1\ **Last updated:** [September 1, 2022, 11:32am UTC](https://forum.commonvisionblox.com/t/camera-connection-state-changed-event-usage/1774 "2022-09-01T11:32:07Z")
Hello, I am developing a program in Ubuntu by using Python. I try to use register\_connection\_state\_changed\_event like below interface\_flags = cvb.DiscoverFlags.UpToLevelInterface | cvb.DiscoverFlags.IgnoreGevFD … --- ## [CVBPY, Open by IP](https://forum.commonvisionblox.com/t/cvbpy-open-by-ip/1771)
**Author:** [@Fatemeh](https://forum.commonvisionblox.com/u/Fatemeh)\ **Replies:** 2\ **Last updated:** [August 31, 2022, 9:20am UTC](https://forum.commonvisionblox.com/t/cvbpy-open-by-ip/1771 "2022-08-31T09:20:02Z")
I am developing by CVBPY on Ubuntu and I wonder if it is possible to connect and interact with the cameras using IP-Address of camera? The reason is I need to use my code in Docker or WSL and in both case I am not able … --- ## [Setting Node Map parameters](https://forum.commonvisionblox.com/t/setting-node-map-parameters/1646)
**Author:** [@keerthitheja](https://forum.commonvisionblox.com/u/keerthitheja)\ **Replies:** 2\ **Last updated:** [March 14, 2022, 9:01am UTC](https://forum.commonvisionblox.com/t/setting-node-map-parameters/1646 "2022-03-14T09:01:48Z")
Hi all, So, I have a SP series area scanner with which I am trying to acquire images. I can read the images from the camera and change few configuration parameters via Node Map. By doing this, I am currently seeing a i… --- ## [Updating CVB Versions on Linux](https://forum.commonvisionblox.com/t/updating-cvb-versions-on-linux/1648)
**Author:** [@antonkristensen](https://forum.commonvisionblox.com/u/antonkristensen)\ **Replies:** 1\ **Last updated:** [March 8, 2022, 12:31pm UTC](https://forum.commonvisionblox.com/t/updating-cvb-versions-on-linux/1648 "2022-03-08T12:31:00Z")
Morning to y’all! Updating CVB versions on Linux, what do i need to be aware of ? Are there any specific steps i need to take ? Anything unusual or is it just running the .deb files? I’m upgrading from 13.03.003 to 1… --- ## [Hi, I want to concatenate multiple images from line scan camera. Which is the best way to do that?](https://forum.commonvisionblox.com/t/hi-i-want-to-concatenate-multiple-images-from-line-scan-camera-which-is-the-best-way-to-do-that/1558)
**Author:** [@Win64](https://forum.commonvisionblox.com/u/Win64)\ **Replies:** 3\ **Last updated:** [December 9, 2021, 9:35pm UTC](https://forum.commonvisionblox.com/t/hi-i-want-to-concatenate-multiple-images-from-line-scan-camera-which-is-the-best-way-to-do-that/1558 "2021-12-09T21:35:49Z")
Hi, I want to concatenate multiple images from line scan camera. Which is the best way to do that? --- ## [Grabbing frames from camera and stream to NGINX rtmp module](https://forum.commonvisionblox.com/t/grabbing-frames-from-camera-and-stream-to-nginx-rtmp-module/1434)
**Author:** [@antonkristensen](https://forum.commonvisionblox.com/u/antonkristensen)\ **Replies:** 7\ **Last updated:** [June 28, 2021, 4:26pm UTC](https://forum.commonvisionblox.com/t/grabbing-frames-from-camera-and-stream-to-nginx-rtmp-module/1434 "2021-06-28T16:26:31Z")
Has anyone setup a connection between the CVBpy library and streamed the incoming images to nginx rtmp module? Have been scouting the interwebs and havent found any great solutions, I want to stream the live view from th… --- ## [Python example GEVServer backend list and send image](https://forum.commonvisionblox.com/t/python-example-gevserver-backend-list-and-send-image/1432)
**Author:** [@ASchmitt](https://forum.commonvisionblox.com/u/ASchmitt)\ **Replies:** 5\ **Last updated:** [June 29, 2021, 6:17am UTC](https://forum.commonvisionblox.com/t/python-example-gevserver-backend-list-and-send-image/1432 "2021-06-29T06:17:34Z")
I have taken the part BackEnd.gev\_server\_stream.send(image, image\_release) “see red underlined” from the gevServer example. Here the method image\_release(img) is called, but nothing is passed to it, so I assumed that … --- ## [Image.save and image.unlock](https://forum.commonvisionblox.com/t/image-save-and-image-unlock/1435)
**Author:** [@antonkristensen](https://forum.commonvisionblox.com/u/antonkristensen)\ **Replies:** 4\ **Last updated:** [June 28, 2021, 12:04pm UTC](https://forum.commonvisionblox.com/t/image-save-and-image-unlock/1435 "2021-06-28T12:04:18Z")
As far as i have understood it, when you call image.save() in the cvbpy library after acquiring image it sends reply to the buffer that the image has been received and the buffer then releases the image right? Am i corr… --- ## [Auto-Brightness, Exposure Time and Long Time Exposure \[ too bright and blurry images\]](https://forum.commonvisionblox.com/t/auto-brightness-exposure-time-and-long-time-exposure-too-bright-and-blurry-images/1368)
**Author:** [@aftab](https://forum.commonvisionblox.com/u/aftab)\ **Replies:** 8\ **Last updated:** [March 25, 2021, 12:49pm UTC](https://forum.commonvisionblox.com/t/auto-brightness-exposure-time-and-long-time-exposure-too-bright-and-blurry-images/1368 "2021-03-25T12:49:40Z")
Hey Once again, I have some specific questions related as you could expect from the heading of this post. So, I have a Teledyne Dalsa Nano c1930 camera. I am trying to acquire the images with 30 fps having image resolu… --- ## [GEV Server Multicast Setup](https://forum.commonvisionblox.com/t/gev-server-multicast-setup/1357)
**Author:** [@njenningsQQ](https://forum.commonvisionblox.com/u/njenningsQQ)\ **Replies:** 2\ **Last updated:** [March 1, 2021, 10:10am UTC](https://forum.commonvisionblox.com/t/gev-server-multicast-setup/1357 "2021-03-01T10:10:02Z")
I am trying to get a GEVServer up and running What I’m trying to do is: Connect to a camera using Common Vision Blox (in python) I want to have one ‘control’ client (control of the camera) and multiple ‘display’ clien… --- ## ["no module named cvb" bei "import cvb"](https://forum.commonvisionblox.com/t/no-module-named-cvb-bei-import-cvb/1016)
**Author:** [@raphy](https://forum.commonvisionblox.com/u/raphy)\ **Replies:** 16\ **Last updated:** [February 11, 2021, 1:48pm UTC](https://forum.commonvisionblox.com/t/no-module-named-cvb-bei-import-cvb/1016 "2021-02-11T13:48:57Z")
Wenn ich den Code aus C:\\CVB\\Tutorial\\Polimago\\CvbPy\\classification.py geladen und wollte es ausfürhen. Dann kommt die Fehlermeldung: ModuleNotFoundError: No module named ‘cvb’ --- ## [API Device discovery with allow-broadcast-acknowledge / ignore-subnet](https://forum.commonvisionblox.com/t/api-device-discovery-with-allow-broadcast-acknowledge-ignore-subnet/1260)
**Author:** [@michaelt](https://forum.commonvisionblox.com/u/michaelt)\ **Replies:** 2\ **Last updated:** [November 9, 2020, 9:14am UTC](https://forum.commonvisionblox.com/t/api-device-discovery-with-allow-broadcast-acknowledge-ignore-subnet/1260 "2020-11-09T09:14:51Z")
Hello, GenICam Browser has an ‘Ignore Subnet Discover’ setting which, when used, sends a GVCP discover command with the ‘allow broadcast acknowledge’ flag set to true. This is useful if: you have a camera with an unk… --- ## [How install CVB python library on ubuntu and run example?](https://forum.commonvisionblox.com/t/how-install-cvb-python-library-on-ubuntu-and-run-example/1253)
**Author:** [@leitoxve](https://forum.commonvisionblox.com/u/leitoxve)\ **Replies:** 1\ **Last updated:** [October 27, 2020, 9:55am UTC](https://forum.commonvisionblox.com/t/how-install-cvb-python-library-on-ubuntu-and-run-example/1253 "2020-10-27T09:55:16Z")
hello!! I’m in truble I try to install CVB on python with pip install cvbpy but doesn’t work; I try to install the package for linux https://forum.commonvisionblox.com/t/common-vision-blox-for-64-bit-linux/366 but the … [Next page](https://forum.commonvisionblox.com/tag/python/70.md?match_all_tags=true&page=1&tags%5B%5D=python)