{"id":5146,"date":"2026-01-10T19:09:49","date_gmt":"2026-01-10T10:09:49","guid":{"rendered":"https:\/\/eternalsphere.net\/echoes\/?p=5146"},"modified":"2026-06-06T10:35:59","modified_gmt":"2026-06-06T01:35:59","slug":"2nih58kwcruvdvf","status":"publish","type":"post","link":"https:\/\/eternalsphere.net\/echoes\/index.php\/2026\/01\/10\/2nih58kwcruvdvf\/","title":{"rendered":"\u7528\u547d\u4ee4\u884c\u5728 Linux \u4e0b\u542f\u7528\u5e76\u67e5\u770b USB \u6444\u50cf\u5934\u753b\u9762"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5728 Linux \u684c\u9762\u73af\u5883\u4e4b\u5916\uff0c\u76f4\u63a5\u7528\u547d\u4ee4\u884c\u63a7\u5236\u548c\u67e5\u770b USB \u6444\u50cf\u5934\u662f\u4e00\u79cd\u975e\u5e38\u9ad8\u6548\u3001\u53ef\u63a7\u4e14\u53ef\u81ea\u52a8\u5316\u7684\u65b9\u5f0f\u3002\u65e0\u8bba\u662f\u7528\u4e8e\u6d4b\u8bd5\u786c\u4ef6\u3001\u642d\u5efa\u670d\u52a1\u5668\u89c6\u9891\u6d41\u3001\u8fdc\u7a0b\u76d1\u63a7\uff0c\u8fd8\u662f\u6392\u67e5\u9a71\u52a8\u95ee\u9898\uff0cV4L2 + FFmpeg \u4f53\u7cfb\u90fd\u662f\u6700\u7a33\u5b9a\u53ef\u9760\u7684\u65b9\u6848\u4e4b\u4e00\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u6587\u5c06\u5b8c\u6574\u4ecb\u7ecd\u5982\u4f55\u5728 Linux \u4e0b\uff0c\u7528\u547d\u4ee4\u884c\u5217\u51fa\u6444\u50cf\u5934\u3001\u8bc6\u522b\u6b63\u786e\u8bbe\u5907\uff0c\u5e76\u4ee5\u6700\u4f73\u53c2\u6570\u8f93\u51fa\u753b\u9762\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001Linux \u6444\u50cf\u5934\u7684\u57fa\u672c\u7ed3\u6784<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Linux \u4e2d\u6240\u6709\u89c6\u9891\u91c7\u96c6\u8bbe\u5907\u90fd\u901a\u8fc7 <strong>V4L2\uff08Video4Linux2\uff09<\/strong> \u66b4\u9732\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/dev\/video0\n\/dev\/video1\n\/dev\/video2\n...\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u4e2a\u7269\u7406\u6444\u50cf\u5934\u901a\u5e38\u4f1a\u66b4\u9732 <strong>\u4e24\u4e2a\u6216\u591a\u4e2a video \u8282\u70b9<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e00\u4e2a\u662f <strong>\u4e3b\u89c6\u9891\u6d41<\/strong><\/li>\n\n\n\n<li>\u53e6\u4e00\u4e2a\u662f <strong>\u526f\u6d41 \/ \u5143\u6570\u636e\u6d41 \/ \u4f4e\u5206\u8fa8\u7387\u6d41<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u9009\u9519\u8282\u70b9\uff0c\u753b\u9762\u53ef\u80fd\u4f1a\u9ed1\u5c4f\u3001\u53ea\u6709\u4f4e\u5206\u8fa8\u7387\uff0c\u6216\u8005\u65e0\u6cd5\u6253\u5f00\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u5217\u51fa\u7cfb\u7edf\u4e2d\u6240\u6709\u6444\u50cf\u5934<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\u67e5\u770b\u5f53\u524d\u5b58\u5728\u7684 video \u8bbe\u5907\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ls -l \/dev\/video*\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7136\u540e\u7528 V4L2 \u67e5\u8be2\u8bbe\u5907\u5f52\u5c5e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>v4l2-ctl --list-devices\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u793a\u4f8b\u8f93\u51fa\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>USB Camera A:\n    \/dev\/video5\n    \/dev\/video6\n    \/dev\/media2\n\nUSB Camera B:\n    \/dev\/video2\n    \/dev\/video3\n    \/dev\/media1\n\nBuilt-in Camera:\n    \/dev\/video0\n    \/dev\/video1\n    \/dev\/media0\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u4e00\u7ec4\u4e0b\u9762\u7684\u4e24\u4e2a <code>\/dev\/videoX<\/code> \u5c31\u5c5e\u4e8e\u540c\u4e00\u4e2a\u7269\u7406\u6444\u50cf\u5934\uff0c\u5176\u4e2d <strong>\u7b2c\u4e00\u4e2a\u901a\u5e38\u662f\u4e3b\u89c6\u9891\u6d41<\/strong>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u67e5\u770b\u6444\u50cf\u5934\u652f\u6301\u7684\u683c\u5f0f\u548c\u5206\u8fa8\u7387<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u786e\u5b9a\u4e3b\u8bbe\u5907\u540e\uff08\u4f8b\u5982 <code>\/dev\/video5<\/code>\uff09\uff0c\u67e5\u8be2\u5b83\u7684\u80fd\u529b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>v4l2-ctl -d \/dev\/video5 --list-formats-ext\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u5e38\u53ef\u4ee5\u770b\u5230\u7c7b\u4f3c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>' MJPG' (Motion-JPEG)\n    2560x1440 @ 30fps\n    1920x1080 @ 30fps\n    1280x720  @ 60fps\n' YUYV'\n    2560x1440 @ 5fps\n    1920x1080 @ 10fps\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u91cc\u53ef\u4ee5\u770b\u51fa\u4e00\u4e2a\u5173\u952e\u4e8b\u5b9e\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>MJPG \u624d\u662f\u9ad8\u5206\u8fa8\u7387\u9ad8\u5e27\u7387\u7684\u6b63\u786e\u6a21\u5f0f<\/strong><br>YUYV \u5728\u9ad8\u5206\u8fa8\u7387\u4e0b\u901a\u5e38\u5e27\u7387\u6781\u4f4e<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u7528 ffplay \u76f4\u63a5\u663e\u793a\u753b\u9762<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a8\u8350\u4f7f\u7528 FFmpeg \u81ea\u5e26\u7684 ffplay\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2K\uff082560\u00d71440 @ 30fps\uff09<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ffplay -f v4l2 -input_format mjpeg -video_size 2560x1440 -framerate 30 -i \/dev\/video5\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">1080p\uff08\u6027\u80fd\u66f4\u7a33\uff09<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ffplay -f v4l2 -input_format mjpeg -video_size 1920x1080 -framerate 30 -i \/dev\/video5\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">720p 60fps\uff08\u753b\u9762\u66f4\u987a\u6ed1\uff09<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ffplay -f v4l2 -input_format mjpeg -video_size 1280x720 -framerate 60 -i \/dev\/video5\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4e0d\u663e\u5f0f\u6307\u5b9a <code>-input_format mjpeg<\/code>\uff0c\u5f88\u591a USB \u6444\u50cf\u5934\u4f1a\u9ed8\u8ba4\u8fdb\u5165 YUYV \u6a21\u5f0f\uff0c\u5bfc\u81f4\u9ad8\u5206\u8fa8\u7387\u4e0b\u5e27\u7387\u6781\u4f4e\u751a\u81f3\u9ed1\u5c4f\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001\u622a\u56fe<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>ffmpeg -f v4l2 -input_format mjpeg -video_size 2560x1440 -i \/dev\/video5 -frames:v 1 snapshot.jpg\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u516d\u3001\u5f55\u50cf<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>ffmpeg -f v4l2 -input_format mjpeg -video_size 2560x1440 -framerate 30 \\\n  -i \/dev\/video5 -c:v libx264 -preset veryfast -crf 23 record.mp4\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6309 <code>q<\/code> \u7ed3\u675f\u5f55\u5236\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e03\u3001\u907f\u514d\u8bbe\u5907\u7f16\u53f7\u53d8\u5316\uff08\u5f3a\u70c8\u63a8\u8350\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><code>\/dev\/video5<\/code> \u8fd9\u6837\u7684\u7f16\u53f7\u5728\u6bcf\u6b21\u63d2\u62d4 USB \u65f6\u53ef\u80fd\u4f1a\u6539\u53d8\u3002<br>Linux \u63d0\u4f9b\u4e86 <strong>\u7a33\u5b9a\u8def\u5f84<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ls -l \/dev\/v4l\/by-id\/\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f1a\u770b\u5230\u7c7b\u4f3c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>usb-XXXX_Camera-video-index0\nusb-XXXX_Camera-video-index1\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u4e2d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>video-index0<\/code> = \u4e3b\u89c6\u9891\u6d41<\/li>\n\n\n\n<li><code>video-index1<\/code> = \u526f\u6d41<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u540e\u5efa\u8bae\u59cb\u7ec8\u4f7f\u7528\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/dev\/v4l\/by-id\/xxx-video-index0\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ffplay -f v4l2 -input_format mjpeg -video_size 2560x1440 -framerate 30 \\\n  -i \/dev\/v4l\/by-id\/usb-XXXX-video-index0\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\u65e0\u8bba\u8bbe\u5907\u5982\u4f55\u91cd\u65b0\u679a\u4e3e\uff0c\u90fd\u4e0d\u4f1a\u9009\u9519\u6444\u50cf\u5934\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u516b\u3001\u603b\u7ed3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 Linux \u4e0b\uff0cUSB \u6444\u50cf\u5934\u7684\u6700\u4f73\u5b9e\u8df5\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528 <code>v4l2-ctl<\/code> \u7cbe\u786e\u8bc6\u522b\u8bbe\u5907<\/li>\n\n\n\n<li>\u4f7f\u7528 <strong>MJPEG<\/strong> \u800c\u4e0d\u662f YUYV<\/li>\n\n\n\n<li>\u660e\u786e\u6307\u5b9a\u5206\u8fa8\u7387\u548c\u5e27\u7387<\/li>\n\n\n\n<li>\u7528 <code>\/dev\/v4l\/by-id\/<\/code> \u56fa\u5b9a\u8bbe\u5907\u8def\u5f84<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e00\u5957\u7ec4\u5408\u53ef\u4ee5\u5b9e\u73b0\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u96f6 GUI \u4f9d\u8d56<\/li>\n\n\n\n<li>\u6781\u9ad8\u7a33\u5b9a\u6027<\/li>\n\n\n\n<li>\u53ef\u7528\u4e8e\u670d\u52a1\u5668\u3001\u5bb9\u5668\u3001\u81ea\u52a8\u5316\u3001OBS\u3001Jitsi\u3001RTSP \u7b49\u4efb\u4f55\u573a\u666f<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u547d\u4ee4\u884c\u63a7\u5236\u6444\u50cf\u5934\uff0c\u6bd4\u684c\u9762\u5de5\u5177\u66f4\u53ef\u9760\u3001\u66f4\u900f\u660e\uff0c\u4e5f\u66f4\u9002\u5408\u957f\u671f\u8fd0\u884c\u7684\u7cfb\u7edf\u73af\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Linux \u684c\u9762\u73af\u5883\u4e4b\u5916\uff0c\u76f4\u63a5\u7528\u547d\u4ee4\u884c\u63a7\u5236\u548c\u67e5\u770b USB \u6444\u50cf\u5934\u662f\u4e00\u79cd\u975e\u5e38\u9ad8\u6548\u3001\u53ef\u63a7\u4e14\u53ef\u81ea\u52a8\u5316\u7684\u65b9\u5f0f\u3002\u65e0\u8bba\u662f\u7528\u4e8e\u6d4b\u8bd5\u786c\u4ef6\u3001\u642d\u5efa\u670d\u52a1\u5668\u89c6\u9891\u6d41\u3001\u8fdc\u7a0b\u76d1\u63a7\uff0c\u8fd8\u662f\u6392\u67e5\u9a71\u52a8\u95ee\u9898\uff0cV4L2 + FFmpeg \u4f53\u7cfb\u90fd\u662f\u6700\u7a33\u5b9a\u53ef\u9760\u7684\u65b9\u6848\u4e4b\u4e00\u3002 \u672c\u6587\u5c06\u5b8c\u6574\u4ecb\u7ecd\u5982\u4f55\u5728 Linux \u4e0b\uff0c\u7528\u547d\u4ee4\u884c\u5217\u51fa\u6444\u50cf\u5934\u3001\u8bc6\u522b\u6b63\u786e\u8bbe\u5907\uff0c\u5e76\u4ee5\u6700\u4f73\u53c2\u6570\u8f93\u51fa\u753b\u9762\u3002 \u4e00\u3001Linux \u6444\u50cf\u5934\u7684\u57fa\u672c\u7ed3\u6784 Linux \u4e2d\u6240\u6709\u89c6\u9891\u91c7\u96c6\u8bbe\u5907\u90fd\u901a\u8fc7 V4L2\uff08Video4Linux2\uff09 \u66b4\u9732\u4e3a\uff1a \u4e00\u4e2a\u7269\u7406\u6444\u50cf\u5934\u901a\u5e38\u4f1a\u66b4\u9732 \u4e24\u4e2a\u6216\u591a\u4e2a video 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