diff --git a/notedown/notes/a/a42566e46c7cc90a.md b/notedown/notes/a/a42566e46c7cc90a.md new file mode 100644 index 0000000..84d439f --- /dev/null +++ b/notedown/notes/a/a42566e46c7cc90a.md @@ -0,0 +1,121 @@ +--- +id: "a42566e46c7cc90a" +title: "AHD摄像头 — LPA3588 v1.3.3 documentation" +url: "http://wiki.neardi.com/wiki/LPA3588/zh_CN/docs/module/ahd_camera.html" +favicon: "http://wiki.neardi.com/favicon.ico" +tags: [] +createdAt: "2026-03-27T03:34:01.857Z" +updatedAt: "2026-03-27T03:34:18.324Z" +contentType: "markdown" +version: 1 +publishedTime: "2026-03-27T03:34:01.842Z" +--- + +# AHD摄像头[](#ahd "Permalink to this heading") + +支持8路航插接口AHD摄像头输入[点击购买](https://item.taobao.com/item.htm?spm=a1z10.5-c-s.w4002-24652054011.15.452135f51yoyO7&id=713917157868)，每路支持`720/1080p@25/30fps`分辨率。 + +## 电源适配器[](#id1 "Permalink to this heading") + +![../../_images/ahd-power.png](http://wiki.neardi.com/wiki/LPA3588/zh_CN/_images/ahd-power.png) + +## AHD摄像头连接图片[](#id2 "Permalink to this heading") + +![../../_images/ahd-connect.png](http://wiki.neardi.com/wiki/LPA3588/zh_CN/_images/ahd-connect.png) + +## 更新固件[](#id3 "Permalink to this heading") + +`20230314`版本之前默认不带AHD\*8功能，通过`uname -a`查询版本； + +若不符合，烧录 [最新标准固件](http://neardi.com/cms/index/productsd.html?id=9&title=LPA3588) 烧录方法参阅 [《使用Type-C线升级固件》](http://wiki.neardi.com/wiki/LPA3588/zh_CN/docs/upgrade.html)一章。 + +## AHD摄像头对应设备节点[](#id4 "Permalink to this heading") + +
AHD设备节点
AHD1/dev/video11
AHD2/dev/video12
AHD3/dev/video13
AHD4/dev/video14
AHD5/dev/video3
AHD6/dev/video2
AHD7/dev/video1
AHD8/dev/video0
+ +## 修改测试脚本[](#id5 "Permalink to this heading") + +修改`/rockchip-test/camera/camera_rkisp_test.sh` 打开`camera_rkisp_test.sh`，然后去掉里面的最后一行后加入： + +``` +DISPLAY=:0.0 gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,format=NV12,width=640,height=480, framerate=30/1 ! fpsdisplaysink& +gst-launch-1.0 v4l2src device=/dev/video1 ! video/x-raw,format=NV12,width=640,height=480, framerate=30/1 ! fpsdisplaysink & +gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,format=NV12,width=640,height=480, framerate=30/1 ! fpsdisplaysink & +gst-launch-1.0 v4l2src device=/dev/video3 ! video/x-raw,format=NV12,width=640,height=480, framerate=30/1 ! fpsdisplaysink & +gst-launch-1.0 v4l2src device=/dev/video11 ! video/x-raw,format=NV12,width=640,height=480, framerate=30/1 ! fpsdisplaysink & +gst-launch-1.0 v4l2src device=/dev/video12 ! video/x-raw,format=NV12,width=640,height=480, framerate=30/1 ! fpsdisplaysink & +gst-launch-1.0 v4l2src device=/dev/video13 ! video/x-raw,format=NV12,width=640,height=480, framerate=30/1 ! fpsdisplaysink & +gst-launch-1.0 v4l2src device=/dev/video14 ! video/x-raw,format=NV12,width=640,height=480, framerate=30/1 ! fpsdisplaysink +``` + +若单独测试一路AHD，务必加上sudo执行： + +``` +sudo gst-launch-1.0 v4l2src device=/dev/video11 ! video/x-raw,format=NV12,width=640,height=480, framerate=30/1 ! fpsdisplaysink +``` + +## 验证测试脚本[](#id6 "Permalink to this heading") + +``` +sudo /rockchip-test/camera/camera_rkisp_test.sh +``` + +执行成功结果： + +``` +neardi@LPA3588:~$ sudo /rockchip-test/camera/camera_rkisp_test.sh +Start RKISP Camera Preview! +Setting pipeline to PAUSED ... +Pipeline is live and does not need PREROLL ... +Pipeline is PREROLLED ... +Setting pipeline to PLAYING ... +New clock: GstSystemClock +Setting pipeline to PAUSED ... +... +Redistribute latency... +0:22:57.3 / 99:99:99. +``` + +![../../_images/ahd-show.png](http://wiki.neardi.com/wiki/LPA3588/zh_CN/_images/ahd-show.png) + +## FAQ[](#faq "Permalink to this heading") + +### AHD摄像头pin脚如何定义的？[](#ahdpin "Permalink to this heading") + +![../../_images/ahd-spec.png](http://wiki.neardi.com/wiki/LPA3588/zh_CN/_images/ahd-spec.png) + +### AHD摄像头为什么不出图？[](#id7 "Permalink to this heading") + +#### 简单排查[](#id8 "Permalink to this heading") + +* 摄像头确保是`720/1080p@25/30fps`分辨率。 + +* 8路摄像头使用同一分辨率和帧率；不要混用，例如AHD1接720p，AHD2接1080p。 + +* 不能热插拔。 + +* 若固件是自行编译的，确保SDK升级到最新的，`V4.0`及以上。 + +* 检查电源，使用`DC 9-36V`电源。 + +* 测试Neardi配套的摄像头，再对比自行购买的摄像头。 + + +#### 抓图排查[](#id9 "Permalink to this heading") + +使用v4l2-ctl工具抓图测试 + +``` +# AHD1抓图 +v4l2-ctl -d /dev/video11 --set-fmt-video=width=1920,height=1080,pixelformat=NV12 --stream-mmap=3 --stream-skip=3 --stream-to=/tmp/ahd.out --stream-count=1 --stream-poll +``` + +抓图正常返回结果，否则为异常： + +``` +<<<< +``` + +### 有没有C++的demo？[](#c-demo "Permalink to this heading") + +参考 [neardi\_cam\_demo](https://gitee.com/neardi-dev/neardi_cam_demo)