<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:content="http://purl.org/rss/1.0/modules/content/"><channel><title>Video on 技术笔记</title><link>https://deguiliu.github.io/tech-notes/tags/video/</link><description>Recent content in Video on 技术笔记</description><generator>Hugo -- 0.168.0</generator><language>zh-cn</language><lastBuildDate>Sun, 20 Sep 2026 08:00:00 +0000</lastBuildDate><atom:link href="https://deguiliu.github.io/tech-notes/tags/video/index.xml" rel="self" type="application/rss+xml"/><item><title>单芯片相机上的 RTSP 服务: 一帧画面怎么送到播放器</title><link>https://deguiliu.github.io/tech-notes/posts/architecture/onchip_camera_rtsp_service/</link><pubDate>Sun, 20 Sep 2026 08:00:00 +0000</pubDate><guid>https://deguiliu.github.io/tech-notes/posts/architecture/onchip_camera_rtsp_service/</guid><description>相机芯片上的 RTSP 服务不建线程，由应用线程反复调用，画面只传地址不复制。全文围绕三件事：定时任务共用一个到期时刻、一帧画面被多个客户端共用时的复用时机、一条连接上控制命令与视频的发送顺序，最后与服务器上的实现逐项对照。</description></item><item><title>嵌入式双路 USB 视频输出: 一个设备、两个摄像头的同步原理</title><link>https://deguiliu.github.io/tech-notes/posts/architecture/embedded_usb_dual_video_output/</link><pubDate>Sun, 20 Sep 2026 08:00:00 +0000</pubDate><guid>https://deguiliu.github.io/tech-notes/posts/architecture/embedded_usb_dual_video_output/</guid><description>一台嵌入式设备通过同一个 USB 控制器输出两路 UVC 视频：IAD 负责让主机看到两个摄像头，内部视频链负责分别产生两路帧，环形缓冲保证单路稳定，时间戳和上位机逻辑完成最终配对。</description></item><item><title>USB 视频设备枚举与能力协商: 描述符、Probe 与 Commit</title><link>https://deguiliu.github.io/tech-notes/posts/practice/usb_uvc_enumeration_and_negotiation/</link><pubDate>Fri, 18 Sep 2026 08:00:00 +0000</pubDate><guid>https://deguiliu.github.io/tech-notes/posts/practice/usb_uvc_enumeration_and_negotiation/</guid><description>主机能够枚举一颗从未见过的芯片，并非因为主机预先识别了该芯片，而是因为设备按 USB 规范用描述符描述自身。描述符说明设备的身份与接口数量，Probe/Commit 协商确定输出格式。</description></item></channel></rss>