V4l2 stride. ), and other members that are required by such components.
V4l2 stride. ), and other members that are required by such components.
- V4l2 stride. please try adding --preferred_stride=<> options within v4l2-ctl command-line to adjust the stride settings. We are working with V4L2 utils. Works, thanks. I calculated that the padding is caused because 2592 is not a dividable by 64 but 2624 does. So the Aug 16, 2024 · After expanding the resolution to 2456*1088, including the margin part, the video stream displayed on argus camera is normal, but the image from V4L2 becomes abnormal, you may also note that… VI’s 64 byte aligned to set the correct stride, set the width alignment to 64. For non-contiguous formats, no constraints are enforced by the format on the relationship between the luma and chroma line padding and stride. NvBuffer contains data pointers, buffer length, file descriptor (FD) of buffer planes, buffer format (height, width, stride, etc. 12. With horizontal subsampling by 2, the chroma line stride is equal to the luma line stride. Already have an account? Sign in to comment. Aug 14, 2024 · After expanding the resolution to 2456*1088, including the margin part, the video stream displayed on argus camera is normal, but the image from V4L2 becomes abnormal, you may also note that… VI’s 64 byte aligned to set the correct stride, set the width alignment to 64. I am new to Jetson Nano and V4L2 Driver Development in general. So I am using 2. Vertical subsampling doesn’t affect the line stride. 5. v4l2_ctrl_handler is the object that keeps track of controls. . 2. Feb 7, 2022 · I’m working with a sensor that outputs 1296 pixels per line in Y10 format (Jetson Xavier AGX, JetPack 4. That means when we call driver of v4l2 with app ,the amount of bytes of pixel data of one frame is not 7202882 but 7362882. Sign up for free to join this conversation on GitHub. 1), this means 2592 bytes per line but on the output frame I received 2624 bytes, this added 16 pixels as padding. Oct 24, 2018 · Hi,all We are running into a problem when capture video of 720x288@50 with csi. Objects in the framework There are two main objects: The v4l2_ctrl object describes the control properties and keeps track of the control’s value (both the current value and the proposed new value). Jan 9, 2024 · It could be the 64 alignment problem. Even though NvBuffer closely resembles v4l2 structures, it can be easily used with other non-v4l2 components. 普通情况下，buffer需要64字节对齐。 Dec 21, 2024 · The following document gathers together notes about a capture subsystem limitation presented on Jetson platforms and how to deal with it by enabling the "stride alignment" feature. Jul 26, 2023 · The width does not have to be aligned to a multiple of 32, however the stride (aka pitch or bytesperline) of the image must be aligned to a multiple of 64 bytes for YUYV formats being passed to the ISP. While porting to Jetson Nano I came up with 2 questions I have not found an answer for in the examples. Tried with 720x576 stride is 1440. Try v4l2-ctl --preferred_stride=1472 Please reference to below topic. I have written a working V4L2 camera driver for another Linux platform. We found that when we capture video with width of 720 pixel (1440 bytes), the value of temp_bpl in driver roundup (function) to 1472, then bytesperline is also changed to 1472 bytes. If I was missing something, please let me know :) While porting I was using your guide on how to implement the driver with tegracam. It maintains a list of v4l2_ctrl objects that it owns and another list of references to controls, possibly to controls owned Aug 6, 2020 · Hello. Let me know if the latest commit (062ebb5) does not fix / close this issue. Nov 20, 2023 · Hello, I work with two different image sensors on a orin nx, sony imx565 and sony imx567. For both, images captured using v4l2 contain garbled pixels at the right end of the lines, replacing the true pixels sent by the… 1. Feb 7, 2023 · 采用 Linux V4L2 抓取Image Sensor图形数据时，有时会发现图像所占空间并不符合图像分辨率及bytes_per_pixel所定义的空间，如图像分辨率为400*400,10 bit color depth实际抓取图像却是332800 bytes，理论上图像占用空间为：400*400*2 bytes =320000 bytes，多余的12800 bytes是怎么来的呢？ 这里就涉及到preferred_stride了。 preferred_stride指一行图像数据需要的内存大小。 以Jetson平台为例，它的图像数据是unpacked存储的，即10bit depth和12 bit depth的数据格式下，一个像素占用两个字节。 1. ), and other members that are required by such components. Jun 21, 2022 · According to v4l2-ctl --list-formats-ext resolution is 144x115 to 720x576. gbos qqyf artfremw alwpdxd kjwsqp wwgsijc bfmlfyqc lgpucv tlmg jitypw