{"id":3514,"date":"2025-09-20T11:58:35","date_gmt":"2025-09-20T03:58:35","guid":{"rendered":"http:\/\/www.51cos.com\/?p=3514"},"modified":"2025-09-20T11:58:35","modified_gmt":"2025-09-20T03:58:35","slug":"h-264%e8%a7%86%e9%a2%91%e6%a0%bc%e5%bc%8f%e7%9a%84usb%e9%87%87%e9%9b%86%e5%8d%a1%e6%9c%89%e5%93%aa%e4%ba%9b%e4%bc%98%e5%8a%bf%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/www.51cos.com\/?p=3514","title":{"rendered":"H.264\u89c6\u9891\u683c\u5f0f\u7684USB\u91c7\u96c6\u5361\u6709\u54ea\u4e9b\u4f18\u52bf\uff1f"},"content":{"rendered":"<p>H.264\u8f93\u51fa\u683c\u5f0f\u867d\u7136\u5728\u4e13\u4e1a\u5f71\u89c6\u540e\u671f\u9886\u57df\u4e0d\u662f\u4e3b\u6d41\uff0c\u4f46\u5728\u76f4\u64ad\u3001\u5f55\u5236\u548c\u79fb\u52a8\u5e94\u7528\u573a\u666f\u4e2d\uff0c\u5b83\u662f\u4e00\u4e2a\u201c\u964d\u7ef4\u6253\u51fb\u201d\u7684\u5229\u5668\u3002<\/p>\n<p>\u628aH.264\u770b\u4f5c\u662f<strong>\u201c\u667a\u80fd\u201d<\/strong>\u548c<strong>\u201c\u9ad8\u6548\u201d<\/strong>\u7684\u4ee3\u540d\u8bcd\u3002\u7ade\u4e89\u5bf9\u624b\u63d0\u4f9b\u7684\u662f\u201c\u539f\u6750\u6599\u201d(NV12)\u548c\u201c\u7c97\u52a0\u5de5\u54c1\u201d(MJPEG)\u3002<\/p>\n<hr \/>\n<h3>\u7b2c\u4e00\u90e8\u5206\uff1a\u6838\u5fc3\u8ba4\u77e5\u2014\u2014\u7406\u89e3\u4f60\u548c\u5bf9\u624b\u7684\u6839\u672c\u533a\u522b<\/h3>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u5fc5\u987b\u628a\u6280\u672f\u672f\u8bed\u7ffb\u8bd1\u6210\u7528\u6237\u80fd\u61c2\u7684\u8bed\u8a00\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th align=\"left\">\u7279\u6027<\/th>\n<th align=\"left\"><strong>\u4f60\u7684\u4ea7\u54c1 (H.264)<\/strong><\/th>\n<th align=\"left\"><strong>\u7ade\u4e89\u5bf9\u624b (NV12\/YUY2)<\/strong><\/th>\n<th align=\"left\"><strong>\u7ade\u4e89\u5bf9\u624b (MJPEG)<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"left\"><strong>\u6570\u636e\u672c\u8d28<\/strong><\/td>\n<td align=\"left\"><strong>\u89c6\u9891\u538b\u7f29\u6d41<\/strong> (\u786c\u4ef6\u7f16\u7801)<\/td>\n<td align=\"left\"><strong>\u539f\u59cb\u89c6\u9891\u5e27<\/strong> (\u65e0\u538b\u7f29)<\/td>\n<td align=\"left\"><strong>\u56fe\u7247\u538b\u7f29\u6d41<\/strong> (\u5e27\u5185\u538b\u7f29)<\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><strong>USB\u5e26\u5bbd\u5360\u7528<\/strong><\/td>\n<td align=\"left\"><strong>\u6781\u4f4e<\/strong> (\u6838\u5fc3\u4f18\u52bf)<\/td>\n<td align=\"left\"><strong>\u6781\u9ad8<\/strong> (\u5de8\u5927\u74f6\u9888)<\/td>\n<td align=\"left\"><strong>\u8f83\u9ad8<\/strong><\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><strong>\u7535\u8111CPU\u5360\u7528<\/strong><\/td>\n<td align=\"left\"><strong>\u6781\u4f4e<\/strong> (\u6838\u5fc3\u4f18\u52bf)<\/td>\n<td align=\"left\"><strong>\u6781\u9ad8<\/strong> (\u9700\u8981CPU\/GPU\u518d\u7f16\u7801)<\/td>\n<td align=\"left\"><strong>\u4e2d\u7b49<\/strong> (\u89e3\u7801\u6d88\u8017)<\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><strong>\u5ef6\u8fdf<\/strong><\/td>\n<td align=\"left\">\u7565\u9ad8 (\u6709\u7f16\u7801\u5ef6\u8fdf)<\/td>\n<td align=\"left\"><strong>\u6781\u4f4e<\/strong> (\u65e0\u7f16\u7801\u5ef6\u8fdf)<\/td>\n<td align=\"left\"><strong>\u8f83\u4f4e<\/strong><\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><strong>\u753b\u8d28\u4fdd\u771f\u5ea6<\/strong><\/td>\n<td align=\"left\">\u6709\u635f\u538b\u7f29\uff0c\u4f46\u5bf9\u76f4\u64ad\u8db3\u591f<\/td>\n<td align=\"left\"><strong>\u6700\u9ad8<\/strong> (\u65e0\u635f)<\/td>\n<td align=\"left\">\u6709\u635f\u538b\u7f29\uff0c\u8d28\u91cf\u4e0d\u5982NV12<\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><strong>\u6587\u4ef6\u5927\u5c0f<\/strong><\/td>\n<td align=\"left\"><strong>\u6781\u5c0f<\/strong> (\u5f55\u5236\u4f18\u52bf)<\/td>\n<td align=\"left\"><strong>\u5de8\u5927<\/strong><\/td>\n<td align=\"left\"><strong>\u8f83\u5927<\/strong><\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><strong>\u9002\u7528\u573a\u666f<\/strong><\/td>\n<td align=\"left\"><strong>\u8d44\u6e90\u6709\u9650\u7684\u73af\u5883<\/strong>\u3001<strong>\u591a\u8def\u8f93\u5165<\/strong>\u3001<strong>\u79fb\u52a8\u8bbe\u5907<\/strong>\u3001<strong>\u957f\u65f6\u95f4\u5f55\u5236<\/strong><\/td>\n<td align=\"left\">\u4e13\u4e1a\u540e\u671f\u3001\u5b9e\u65f6\u7279\u6548\u3001\u9876\u914d\u7535\u8111<\/td>\n<td align=\"left\">\u517c\u5bb9\u6027\u8981\u6c42\u9ad8\u7684\u7b80\u5355\u573a\u666f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u4f60\u7684\u6838\u5fc3\u4ef7\u503c\u4e3b\u5f20\u5e94\u8be5\u662f\uff1a<\/strong> <strong>\u201c\u4e3a\u9ad8\u6548\u800c\u751f\uff0c\u4e3a\u76f4\u64ad\u51cf\u8d1f\u201d<\/strong>\u3002<\/p>\n<hr \/>\n<h3>\u7b2c\u4e8c\u90e8\u5206\uff1a\u4ea7\u54c1\u5ba3\u4f20\u7b56\u7565\u2014\u2014\u5982\u4f55\u8bb2\u597d\u4f60\u7684\u6545\u4e8b<\/h3>\n<p>\u4e0d\u8981\u548c\u5bf9\u624b\u786c\u78b0\u786c\u6bd4\u62fc\u201c\u753b\u8d28\u65e0\u635f\u201d\u548c\u201c\u96f6\u5ef6\u8fdf\u201d\uff0c\u90a3\u662f\u4ed6\u4eec\u7684\u4e3b\u573a\u3002\u4f60\u8981\u5f00\u8f9f\u65b0\u6218\u573a\uff0c\u5f3a\u8c03\u4f60\u7684\u4ea7\u54c1\u5982\u4f55\u89e3\u51b3\u7528\u6237\u7684<strong>\u201c\u9690\u6027\u75db\u70b9\u201d<\/strong>\u3002<\/p>\n<h4><strong>\u5ba3\u4f20\u53e3\u53f7\/\u6838\u5fc3\u5356\u70b9\u63d0\u70bc\uff1a<\/strong><\/h4>\n<ul>\n<li><strong>\u4e3b\u6253\u53e3\u53f7\uff1a<\/strong>\n<ul>\n<li>\u201c\u8f7b\u88c5\u4e0a\u9635\uff0c\u4e13\u4e1a\u76f4\u64ad\u201d \u2014\u2014 \u5f3a\u8c03\u4f4e\u95e8\u69db\u3002<\/li>\n<li>\u201c\u4e0d\u6b62\u662f\u91c7\u96c6\uff0c\u66f4\u662f\u4f60\u7684\u4e13\u5c5e\u7f16\u7801\u5668\u201d \u2014\u2014 \u5f3a\u8c03\u4ea7\u54c1\u529f\u80fd\u3002<\/li>\n<li>\u201c\u544a\u522b\u5361\u987f\uff0c\u4e13\u6ce8\u4f60\u7684\u9ad8\u5149\u65f6\u523b\u201d \u2014\u2014 \u76f4\u51fb\u6e38\u620f\u76f4\u64ad\u75db\u70b9\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6838\u5fc3\u5356\u70b9\uff08\u628a\u4f18\u52bf\u7ffb\u8bd1\u6210\u7528\u6237\u5229\u76ca\uff09\uff1a<\/strong>\n<ol>\n<li><strong>\u3010\u89e3\u653eCPU\uff0c\u6e38\u620f\u76f4\u64ad\u4e0d\u6389\u5e27\u3011<\/strong>\n<ul>\n<li><strong>\u5ba3\u4f20\u8bed\uff1a<\/strong> \u201c\u5185\u7f6e\u786c\u4ef6\u7f16\u7801\u5f15\u64ce\uff0c\u76f4\u64ad\u5f55\u5236CPU\u5360\u7528\u7387\u964d\u4f4e80%\uff01\u544a\u522b\u4e3a\u4e86\u76f4\u64ad\u800c\u964d\u4f4e\u6e38\u620f\u753b\u8d28\u7684\u65f6\u4ee3\u3002\u4f60\u7684\u7535\u8111\uff0c\u53ea\u9700\u4e13\u6ce8\u6e38\u620f\u672c\u8eab\u3002\u201d<\/li>\n<li><strong>\u5bf9\u6bd4\u56fe\uff1a<\/strong> \u5236\u4f5c\u4e00\u5f20\u4efb\u52a1\u7ba1\u7406\u5668\u622a\u56fe\u5bf9\u6bd4\u56fe\uff0c\u4e00\u8fb9\u662f\u4f7f\u7528NV12\u91c7\u96c6\u5361\u65f6OBS\u7684\u9ad8CPU\u5360\u7528\uff0c\u4e00\u8fb9\u662f\u4f7f\u7528\u4f60\u4ea7\u54c1\u65f6\u7684\u4f4eCPU\u5360\u7528\u3002\u89c6\u89c9\u51b2\u51fb\u529b\u6781\u5f3a\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u3010\u8d85\u4f4e\u5e26\u5bbd\uff0c\u7b14\u8bb0\u672c\u4e5f\u80fd\u591a\u673a\u4f4d\u76f4\u64ad\u3011<\/strong>\n<ul>\n<li><strong>\u5ba3\u4f20\u8bed\uff1a<\/strong> \u201c\u4e00\u4e2aUSB\u53e3\uff0c\u5b9e\u73b0\u591a\u8def\u89c6\u9891\u91c7\u96c6\u4e0d\u662f\u68a6\uff01H.264\u7684\u8d85\u4f4e\u5e26\u5bbd\u5360\u7528\uff0c\u8ba9\u4f60\u7684\u7b14\u8bb0\u672c\u7535\u8111\u4e5f\u80fd\u8f7b\u677e\u642d\u5efa\u4e13\u4e1a\u7684\u591a\u673a\u4f4d\u76f4\u64ad\u95f4\uff0c\u65e0\u9700\u6602\u8d35\u7684\u6269\u5c55\u575e\u3002\u201d<\/li>\n<li><strong>\u573a\u666f\u56fe\uff1a<\/strong> \u5c55\u793a\u4e00\u53f0\u666e\u901a\u7b14\u8bb0\u672c\uff0c\u901a\u8fc7USB Hub\u8fde\u63a52-3\u4e2a\u4f60\u7684\u91c7\u96c6\u5361\uff0c\u540c\u65f6\u5728OBS\u91cc\u663e\u793a\u591a\u8def\u89c6\u9891\u6e90\u7684\u753b\u9762\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u3010\u5373\u5f55\u5373\u5b58\uff0cTB\u7ea7\u786c\u76d8\u4e0d\u518d\u662f\u521a\u9700\u3011<\/strong>\n<ul>\n<li><strong>\u5ba3\u4f20\u8bed\uff1a<\/strong> \u201c\u5f55\u52361\u5c0f\u65f61080P 60Hz\u89c6\u9891\uff0c\u6587\u4ef6\u5927\u5c0f\u4ec5\u9700X GB\u3002H.264\u683c\u5f0f\u76f4\u51fa\uff0c\u65e0\u9700\u4e8c\u6b21\u538b\u7f29\uff0c\u5927\u5927\u8282\u7701\u4f60\u7684\u786c\u76d8\u7a7a\u95f4\uff0c\u7d20\u6750\u7ba1\u7406\u66f4\u8f7b\u677e\u3002\u201d<\/li>\n<li><strong>\u5bf9\u6bd4\u6570\u636e\uff1a<\/strong> \u5217\u51fa\u5f55\u5236\u540c\u6837\u65f6\u957f\uff0cNV12\u683c\u5f0f\uff08\u901a\u8fc7OBS\u5f55\u5236\uff09\u548c\u4f60\u7684H.264\u683c\u5f0f\u7684\u6587\u4ef6\u5927\u5c0f\u5bf9\u6bd4\uff0c\u4f8b\u5982\uff1a300GB vs 5GB\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u3010\u79fb\u52a8\u4f18\u5148\uff0c\u624b\u673a\/\u5e73\u677f\u53d8\u8eab\u4e13\u4e1a\u5bfc\u64ad\u53f0\u3011<\/strong>\n<ul>\n<li><strong>\u5ba3\u4f20\u8bed\uff1a<\/strong> \u201c\u539f\u751f\u652f\u6301\u79fb\u52a8\u8bbe\u5907\uff01\u65e0\u9700\u5f3a\u5927CPU\uff0c\u4e00\u6839OTG\u7ebf\uff0c\u8ba9\u4f60\u7684\u5b89\u5353\u624b\u673a\/\u5e73\u677f\u4e5f\u80fd\u7a33\u5b9a\u63a5\u65361080P 60Hz\u9ad8\u6e05\u89c6\u9891\u6d41\uff0c\u968f\u65f6\u968f\u5730\u5f00\u542f\u6237\u5916\u76f4\u64ad\u6216\u4f5c\u4e3a\u76d1\u89c6\u5668\u3002\u201d<\/li>\n<li><strong>\u573a\u666f\u56fe\uff1a<\/strong> \u4e00\u4e2a\u4eba\u5728\u6237\u5916\uff0c\u7528\u76f8\u673a\u8fde\u63a5\u4f60\u7684\u91c7\u96c6\u5361\uff0c\u518d\u901a\u8fc7OTG\u7ebf\u8fde\u63a5\u5230\u5b89\u5353\u624b\u673a\u8fdb\u884c\u76f4\u64ad\u7684\u573a\u666f\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n<hr \/>\n<h3>\u7b2c\u4e09\u90e8\u5206\uff1a\u5dee\u5f02\u5316\u529f\u80fd\u4e0e\u5e94\u7528\u573a\u666f\u2014\u2014\u627e\u5230\u4f60\u7684\u84dd\u6d77\u5e02\u573a<\/h3>\n<p>\u8fd9\u662f\u53d6\u80dc\u7684\u5173\u952e\u3002\u4f60\u7684\u4ea7\u54c1\u80fd\u670d\u52a1\u597d\u5bf9\u624b\u670d\u52a1\u4e0d\u597d\uff0c\u751a\u81f3\u6839\u672c\u65e0\u6cd5\u670d\u52a1\u7684\u5ba2\u6237\u3002<\/p>\n<h4><strong>\u76ee\u6807\u7528\u6237\u753b\u50cf\u4e0e\u573a\u666f\uff1a<\/strong><\/h4>\n<ol>\n<li><strong>\u9884\u7b97\u6709\u9650\u7684\u6e38\u620f\u4e3b\u64ad\/UP\u4e3b\uff1a<\/strong>\n<ul>\n<li><strong>\u75db\u70b9\uff1a<\/strong> \u7535\u8111\u914d\u7f6e\u4e0d\u9ad8\uff08\u5c24\u5176\u662fCPU\u548c\u7b14\u8bb0\u672c\u7528\u6237\uff09\uff0c\u5f00\u76f4\u64ad\u6216\u5f55\u5236\u65f6\u6e38\u620f\u5e27\u7387\u5927\u5e45\u4e0b\u964d\uff0c\u4f53\u9a8c\u7cdf\u7cd5\u3002<\/li>\n<li><strong>\u4f60\u7684\u89e3\u51b3\u65b9\u6848\uff1a<\/strong> 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