Hi, I want to capture video (320x240) from 4 usb cameras simultaneously on TX2 system. Firstly, I am trying to use camera-viewer to open 4 usb cameras for a quick test. But it is failed to allocate memory when opening the third camera. The 4 cameras are USB2.0 and connected to the TX2 with a USB 3…

Hi DaneLLL, You are right! Actually this is a quick and ugly hack but it let you work with more than one UVC camera (actually you need to be careful on not setting the bandwidth too low for your camera). The main issue is that the UVC driver stack does not implement a logic to calculate the real ba…

Hi, You need to use USB3 cameras to get 5Gbps bancwidth. Here is s similar post: [image] connected more than two usb cameras problem on deepstream-app (Jetson Nano Dev Kit) DeepStream SDK Hi, With further investigation, we found bandwidth limitation is hit in using USB2…

Hi @bryanmok , If you need to use 4 usb cameras without changing to usb 3.0, you can use a workaround to “hack” the uvc-video driver. Find instructions in the following guide: Installation_Guide#Patch_to_support_4_USB_cameras Please notice probably the patch will not apply directly, but you can ma…

Hi @fabian.solano Thanks for sharing the patch. Looks like the patch takes effect when we set MJPG format. If we set YUV422(UYVY, YUYV, …) format, it does not take effect. Is my understanding correct? Would like to get more information and please advise. Thanks.

Hi @DaneLLL , Tried USB3.0 camera and works fine. Thanks!

@bryanmok Would you mind to share what brand/type of cams you did use?

Failed to allocate memory for four usb cameras

Robotics & Edge Computing Jetson Systems Jetson TX2

DaneLLL April 13, 2020, 1:51am 3

Hi,
You need to use USB3 cameras to get 5Gbps bancwidth.

Here is s similar post:

Use gstreamer to open two USB cameras, Failed to allocate required memory

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Failed to allocate memory for four usb cameras

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