{"id":141,"date":"2007-10-13T08:30:17","date_gmt":"2007-10-13T00:30:17","guid":{"rendered":"http:\/\/learn-house.idv.tw\/?p=141"},"modified":"2011-03-15T22:45:05","modified_gmt":"2011-03-15T14:45:05","slug":"%e5%88%a9%e7%94%a8-linux-%e5%bb%ba%e6%a7%8b-video-streaming","status":"publish","type":"post","link":"https:\/\/learn-house.idv.tw\/?p=141","title":{"rendered":"\u5229\u7528 Linux \u5efa\u69cb Video Streaming"},"content":{"rendered":"

\u539f\u59cb\u8cc7\u6599\u4f86\u6e90:j2h\u8ad6\u58c7<\/a><\/p>\n

Video Streaming \u7684\u6280\u8853\u5df2\u7d93\u51fa\u73fe\u591a\u5e74\uff0c\u5728 Internet \u4e0a\u7684\u61c9\u7528\u4e5f\u5df2\u7d93\u76f8\u7576\u5ee3\u6cdb\uff0c<\/p>\n

\u800c\u5229\u7528 Linux \u5efa\u69cb Video Streaming Server \u4e5f\u662f\u76f8\u7576\u71b1\u9580\u7684\u8a71\u984c\u3002<\/p>\n

\u5982\u679c\u60a8\u60f3\u77ad\u89e3\u4ec0\u9ebc\u662f Video Streaming\uff0c<\/p>\n

\u672c\u6587\u5c0d Video Streaming \u7684\u89c0\u5ff5\u8207\u6280\u8853\u5c07\u505a\u4e86\u6e05\u695a\u800c\u57fa\u672c\u7684\u4ecb\u7d39\u3002\u00a0<\/p>\n

Video Streaming \u4f86\u7684\u6b63\u662f\u6642\u5019<\/big><\/strong><\/span><\/p>\n

\u770b\u5230 “Video” Streaming \u5c31\u77e5\u9053\u9019\u500b\u6280\u8853\u8207\u5f71\u97f3\u6709\u95dc\u3002Video Streaming \u662f\u4e00\u7a2e\u7d93\u7531\u7db2\u8def\u4f86\u64a5\u653e\u5f71\u97f3\u6a94\u6848\u7684\u6280\u8853\uff0cVideo “Streaming” \u7684\u57fa\u672c\u6982\u5ff5\u70ba\u300c\u4e00\u908a\u4e0b\u8f09\u4e00\u908a\u64a5\u653e\u300d\uff0c\u6211\u5011\u7a31\u4e4b\u70ba\u300cPlay as received\u300d\u3002<\/p>\n

\u7d93\u7531 Internet \u5982\u679c\u8981\u6536\u770b\u9060\u7aef\u4f3a\u670d\u5668\u7684\u96fb\u8996\u6a94\u6848\uff0c\u6700\u539f\u59cb\u7684\u505a\u70ba\u662f\u300c\u4e0b\u8f09\u5f8c\u518d\u64a5\u653e\u300d\uff0c\u4e5f\u5c31\u662f\u7d93\u7531 FTP \u6216 HTTP \u5c07\u6574\u500b\u6a94\u6848\u4e0b\u8f09\u81f3\u672c\u5730\u7aef\u5f8c\u518d\u5229\u7528\u64a5\u653e\u7a0b\u5f0f\u4f86\u64a5\u653e\uff0c\u6211\u5011\u7a31\u4e4b\u70ba\u300cPlay after download\u300d\u3002<\/p>\n

\u4ee5\u6700\u5e38\u898b\u7684\u4f8b\u5b50\u4f86\u8b1b\uff0c\u6211\u5011\u53ef\u4ee5\u7d93\u7531\u7db2\u8def\u5c07 MP3 \u5b8c\u6574\u4e0b\u8f09\u5f8c\u518d\u64a5\u653e\uff0c\u4e5f\u5c31\u662f Play after download\uff0c\u6216\u8005\u6211\u5011\u4e5f\u53ef\u4ee5\u4e00\u908a\u4e0b\u8f09 MP3 \u4e00\u908a\u807d\u97f3\u6a02\uff0c\u9019\u7a2e\u65b9\u5f0f\u5247\u7a31\u70ba Play as received\u3002\u5176\u4ed6\u7684\u61c9\u7528\u7bc4\u4f8b\u9084\u5f88\u591a\uff0c\u4f8b\u5982\u5229\u7528 RealPlayer\u300c\u5373\u6642\u89c0\u770b\u5f71\u7247\u6216\u662f\u807d\u97f3\u6a02\u300d\uff0c\u9019\u7a2e\u5373\u6642\u64a5\u653e\u7684\u65b9\u5f0f\u5373\u662f Play as received\uff0c\u6211\u5011\u7a31\u9019\u6a23\u7684\u6280\u8853\u70ba Video Streaming Technology\u3002<\/p>\n

\u70ba\u4ec0\u9ebc\u8aaa Video Streaming \u7684\u6280\u8853\u4f86\u7684\u6b63\u662f\u6642\u5019\u5462\uff1f\u8209\u500b\u6700\u7c21\u55ae\u7684\u60c5\u6cc1\uff0c\u4f60\u53ef\u80fd\u5728\u4e0b\u8f09 MP3 \u4e4b\u524d\u60f3\u8981\u8a66\u807d\u4e00\u4e0b\u97f3\u6a02\u7684\u5167\u5bb9\uff0c\u800c\u4e0b\u8f09\u97f3\u6a02\u7247\u6bb5\u7684\u65b9\u5f0f\u53c8\u986f\u5f97\u4e0d\u5920\u53cb\u5584\uff0c\u9019\u6642\u5982\u679c\u5229\u7528 Video Streaming \u7684\u6280\u8853\u4f86\u8b93\u7db2\u53cb\u8996\u807d\uff0c\u4e0d\u4f46\u65b9\u4fbf\uff0c\u800c\u4e14\u4e0d\u5fc5\u6d6a\u8cbb\u6642\u9593\u4f86\u4e0b\u8f09\u4e0d\u559c\u6b61\u7684\u97f3\u6a02\u7684\u3002<\/p>\n

\u96a8\u8457\u7db2\u8def\u983b\u5bec\u7684\u6539\u9032\u8207 IPv6 \u7684\u51fa\u73fe\uff0cVideo Streaming \u7684\u61c9\u7528\u5c07\u8d8a\u4f86\u8d8a\u5ee3\u6cdb\uff0c\u5229\u7528 Video Streaming \u4f86\u8a2d\u8a08\u7684\u8cc7\u8a0a\u5bb6\u96fb\u4e5f\u6703\u8d8a\u4f86\u8d8a\u591a\uff0c\u4f8b\u5982\u8f03\u5e38\u88ab\u63d0\u53ca\u7684\u7db2\u8def\u96fb\u8a71 (InterPhone)\u3002<\/p>\n

\u9664\u4e86\u5bec\u983b\u7db2\u8def\u7684\u666e\u53ca\u5916\uff0c\u5132\u5b58\u8a2d\u5099\u7684\u5927\u9032\u6b65\u4e5f\u662f\u52a0\u901f Video Streaming \u9032\u7528\u666e\u53ca\u7684\u6700\u5927\u52d5\u529b\uff0c\u4f8b\u5982\u5229\u7528 Linux \u8a2d\u8a08\u7684 NAS \u53ef\u4ee5\u88ab\u7528\u4f86\u7576\u505a\u5927\u578b\u7684\u5f71\u97f3\u4f3a\u670d\u5668\u6216\u662f\u52d5\u614b\u96fb\u5f71\u8cc7\u6599\u5eab (DMD)\u3002<\/p>\n

VCD & MPEG-1<\/big><\/strong><\/span><\/p>\n

\u8981\u63d0\u5230\u64a5\u653e\u52d5\u614b\u5f71\u97f3\u7684\u5148\u8ec0\uff0c\u7d55\u5c0d\u8981\u5148\u5f9e VCD \u8aaa\u8d77\uff0c\u56e0\u70ba\u9019\u662f\u5728\u96fb\u8166\u51fa\u73fe\u5f8c\uff0c\u6700\u80fd\u6df1\u5165\u6d88\u8cbb\u8005\u5e02\u5834\u7684\u7522\u54c1\u3002<\/p>\n

\u60f3\u7576\u5e74\uff0c\u8981\u64a5\u653e VCD \u9664\u4e86\u8981\u6709\u4e00\u53f0\u7576\u6642\u7b97\u662f\u9ad8\u64cb\u8ca8\u7684 1x CD-ROM \u5916\uff0c\u9084\u8981\u518d\u53e6\u5916\u52a0\u88dd\u4e5f\u662f\u9ad8\u64cb\u8ca8\u7684 MPEG \u5361\u3002\u64a5\u653e VCD \u5176\u5be6\u5c31\u662f Video Streaming \u7684\u6280\u8853\uff0c\u56e0\u70ba VCD \u7684\u8cc7\u6599\u662f\u4e00\u908a\u8b80\u53d6\u4e00\u908a\u64a5\u653e\uff0c\u90a3\u70ba\u4ec0\u9ebc\u8981\u6709 MPEG Card \u5462\uff1f\u7406\u6240\u7576\u7136\u7684\uff0c\u9019\u662f\u56e0\u70baMPEG-1 \u7684\u6a19\u6e96\u3002<\/p>\n

MPEG-1 \u88ab\u8a2d\u8a08\u5728 1x CD-ROM \u4e0a\u64a5\u653e VCD\uff0c\u800c VCD \u4e0a\u7684\u8cc7\u6599\u5fc5\u9808\u7d93\u7531 MPEG Card \u89e3\u78bc (decode) \u5f8c\u624d\u80fd\u64a5\u653e\u3002\u4f46\u662f\u96a8\u8457\u786c\u9ad4\u7684\u9032\u6b65\uff0c\u73fe\u5728\u53ef\u4ee5\u7d93\u7531\u8edf\u9ad4\u4f86\u505a MPEG-1 \u89e3\u78bc\u7684\u5de5\u4f5c\u3002\u6211\u5011\u5c07\u5728\u5f8c\u6587\u4ecb\u7d39 MPEG-1 \u7684\u8a2d\u8a08\u6982\u5ff5\u3002<\/p>\n

DVD & MPEG-2<\/big><\/strong><\/span><\/p>\n

MPEG-2 \u5e38\u88ab\u63d0\u5230\u5247\u662f\u7531\u65bc DVD \u7684\u6d41\u884c\u3002\u4e0d\u7ba1\u662f MPEG-1 \u6216\u662f MPEG-2\uff0c\u5176\u5be6\u662f\u4e00\u7a2e\u7de8\u78bc\u7684\u6280\u8853\uff0c\u800c DVD-ROM \u5247\u662f\u9078\u64c7\u4e86 MPEG-2 \u4f86\u7576\u505a\u5b83\u7684\u58d3\u7e2e\u6a19\u6e96\u3002<\/p>\n

\u800c DVD \u4e4b\u6240\u4ee5\u7121\u6cd5\u50cf VCD \u4e00\u6a23\u80fd\u88ab\u300c\u5099\u4efd\u5230\u786c\u789f\u300d\uff0c\u5247\u662f\u7531\u65bc\u5176\u4e2d\u53c8\u52a0\u9032\u4e86\u4e09\u9053\u7684\u4fdd\u8b77\uff0c\u7b2c\u4e8c\u9053\u4fdd\u8b77\u5c31\u662f\u73a9\u5bb6\u5011\u8033\u719f\u80fd\u8a73\u7684 CSS\u3002\u5728 Linux \u4e0b\u4e4b\u6240\u4ee5\u7121\u6cd5\u6709\u300c\u5408\u6cd5\u300d\u7684 DVD Player\uff0c\u5c31\u662f\u53d7\u5236\u65bc CSS \u7684\u95dc\u4fc2\u3002<\/p>\n

\u5229\u7528 NAS \u4f86\u8a2d\u8a08 Video Server\uff0c\u8981\u5132\u5b58\u4e26\u5ee3\u64a5 VCD \u5df2\u7d93\u6c92\u6709\u6280\u8853\u4e0a\u7684\u969c\u7919\uff0c\u4f46\u662f\u8981\u5132\u5b58\u4e26\u64f4\u64a5 DVD\uff0c\u5247\u6709\u6cd5\u5f8b\u4e0a\u7684\u554f\u984c\uff0c\u9019\u9ede\u662f\u503c\u5f97\u6211\u5011\u6df1\u601d\u7684\u4e00\u500b\u554f\u984c\u3002\u56e0\u70ba\u76ee\u524d CSS \u7684\u6280\u8853\u638c\u63e1\u5728\u65e5\u672c\u4eba\u624b\u88cf\uff0c\u8981\u53d6\u5f97\u9019\u9805\u6280\u8853\u5fc5\u9808\u7c3d\u7f72 NDA\uff0c\u4e0d\u904e CSS \u4e26\u975e\u4e0d\u53ef\u7834\u89e3\u60f3\u5fc5\u5927\u5bb6\u90fd\u77e5\u9053\uff0c\u4f46\u662f\u5c31\u662f\u6709\u7248\u6b0a\u4e0a\u7684\u554f\u984c\u3002<\/p>\n

\u5f71\u50cf\u7de8\u78bc\u6280\u8853\u4ecb\u7d39<\/big><\/strong><\/span><\/p>\n

\u76ee\u524d\u5b78\u8853\u754c\u5df2\u7d93\u767c\u5c55\u51fa\u8a31\u591a\u8655\u7406\u5f71\u50cf\u8a0a\u865f\u58d3\u7e2e\u53ca\u7de8\u78bc\u7684\u6280\u8853 (codecs)\uff0c\u8ac7\u5230\u9019\u4e9b\u6280\u8853\uff0c\u61c9\u7528\u6700\u5ee3\u6cdb\u7684\u7de8\u78bc\u6a19\u6e96\u5e95\u4e0b\u56db\u7a2e\uff1a<\/p>\n

    \n
  1. ) H.261<\/li>\n
  2. ) H.263<\/li>\n
  3. ) JPEG, MJPEG<\/li>\n
  4. ) MPEG<\/li>\n<\/ol>\n

    \u5e95\u4e0b\u5c07\u5206\u5225\u7c21\u55ae\u4ecb\u7d39\u9019\u56db\u7a2e\u7de8\u78bc\u6280\u8853\u3002<\/p>\n

    H.261 \u6a19\u6e96<\/span><\/strong><\/p>\n

    H.261 \u7684\u5f71\u50cf\u7de8\u78bc\u6a19\u6e96\u51fa\u73fe\u5728 1990 \u5e74\u7684 ITU\u3002\u4e00\u958b\u59cb\u7684\u7528\u9014\u4e3b\u8981\u662f\u652f\u63f4\u5f71\u50cf\u96fb\u8a71 (video phone) \u8207\u8996\u8a0a\u6703\u8b70 (video conferencing)\u3002H.261 \u7684\u683c\u5f0f\u6709\u4e8c\u7a2e\uff0c\u5206\u5225\u6709\u4e0d\u540c\u7684\u89e3\u6790\u5ea6\uff1a<\/p>\n

      \n
    1. ) QCIF\uff1a176×144<\/li>\n
    2. ) CIF\uff1a352×288<\/li>\n<\/ol>\n

      H.261 \u7684 fps (frames per second) \u53ef\u4ee5\u9054\u5230 7.5, 10, 15 \u8207 30 fps\u3002\u7531\u65bc H.261 \u4e00\u958b\u59cb\u662f\u67b6\u69cb\u5728 ISDN B \u4e0a\u9762\uff0c\u800c ISDN B \u7684\u50b3\u8f38\u901f\u5ea6\u70ba 64 Kbps\uff0c\u6240\u4ee5 H.261 \u4e5f\u88ab\u7a31\u70ba Px64 (x = 1 to 30)\u3002<\/p>\n

      CIF \u5168\u540d\u70ba (Common Intermediate Format)\uff0c\u4e3b\u8981\u662f\u70ba\u4e86\u8981\u652f\u63f4\u5404\u7a2e\u4e0d\u540c\u89e3\u6790\u5ea6\u7684\u96fb\u5f71\u800c\u88ab\u5b9a\u7fa9\u51fa\u4f86\uff0c\u4f8b\u5982 NTSC, PAL, SECAM \u96fb\u8996\u7cfb\u7d71\u3002\u800c QCIF \u5247\u662f Quarter-CIF \u4e5f\u5c31\u662f CIF \u89e3\u6790\u5ea6\u7684\u4e00\u534a\u3002<\/p>\n

      \u9664\u6b64\u4e4b\u5916\uff0cH.261 \u4e5f\u53ef\u4ee5\u8aaa\u662f MPEG-1 \u6a19\u6e96\u7684\u524d\u8f29\u3002<\/p>\n

      H.263 \u6a19\u6e96<\/strong><\/span><\/p>\n

      H.263 \u662f H.261 \u7684\u52a0\u5f37\u7248\uff0c\u8a95\u751f\u65bc 1994 \u5e74 (ITU)\u3002H.263 \u958b\u59cb\u652f\u63f4 PSTN\uff0c\u4e0d\u904e\u8981\u7279\u5225\u8aaa\u660e\u4e00\u9ede\uff0cH.263 \u6bd4 MPEG-1 \u9084\u8981\u665a\u51fa\u73fe\uff0c\u800c\u4e14 H.263 \u9084\u662f\u57fa\u65bc MPEG-1 \u800c\u767c\u5c55\u3002<\/p>\n

      H.263 \u7684\u6a19\u6e96\u5171\u652f\u63f4\u4e94\u7a2e\u4e0d\u540c\u7684\u89e3\u6790\u5ea6\uff0c\u5206\u5225\u70ba\uff1a<\/p>\n

        \n
      1. ) Sub-QCIF\uff1a128×96<\/li>\n
      2. ) QCIF\uff1a176×144<\/li>\n
      3. ) CIF\uff1a352×288<\/li>\n
      4. ) 4CIF\uff1a704×576<\/li>\n
      5. ) 16CIF\uff1a1408×1152<\/li>\n<\/ol>\n

        \u50b3\u8f38\u901f\u5ea6\u70ba 8 Kbps ~ 1.5 Mbps\u3002\u9664\u6b64\u4e4b\u5916\uff0cH.263 \u4e5f\u662f MPEG-4 \u6a19\u6e96\u7684\u57fa\u790e\u3002<\/p>\n

        JPEG<\/strong><\/span><\/p>\n

        \u63d0\u5230 JPEG \u7684\u6a19\u6e96\uff0c\u5927\u5bb6\u53ef\u5c31\u4e0d\u83ab\u751f\u4e86\uff0c\u7531\u5176\u662f\u5728 GIF \u767c\u51fa\u7981\u4ee4\u5f8c\uff0cJPEG \u66f4\u662f\u88ab\u5ee3\u6cdb\u61c9\u7528\u3002JPEG \u7684\u5168\u540d\u5927\u5bb6\u4e00\u5b9a\u4e0d\u83ab\u751f\uff0c\u4ed6\u53ef\u662f\u8d6b\u8d6b\u6709\u540d\u7684\u4e00\u7fa4\u6280\u8853\u5718\u968a\u7684\u7e2e\u5beb – Joint Photographic Experts Group\u3002<\/p>\n

        JPEG \u662f 24-bit \u7684 “true-color” \u5f71\u50cf\u6a19\u6e96\uff0cJPEG \u7684\u5de5\u4f5c\u662f\u5c07 RGB \u683c\u5f0f\u7684\u5f71\u50cf\u8f49\u63db\u6210 YCrCB \u683c\u5f0f\uff0c\u76ee\u7684\u662f\u70ba\u4e86\u6e1b\u5c11\u6a94\u6848\u5927\u5c0f\uff0c\u4e00\u822c\u7d04\u53ef\u6e1b\u5c11 1\/3 ~ 1\/2 \u5de6\u53f3\u3002<\/p>\n

        \u4e0d\u904e MJPEG \u624d\u662f\u6211\u5011\u7684\u4e3b\u89d2\uff0cMJPEG \u5168\u540d\u70ba “Motion” JPEG\uff0c\u4e5f\u5c31\u662f\u6703\u52d5\u7684 JPEG \u5716\u6a94\u3002\u8a31\u591a Video Streaming \u7684\u5834\u5408\uff0c\u50cf\u662f\u7c21\u55ae\u7684\u8996\u8a0a\u6703\u8b70\u8edf\u9ad4\u90fd\u6703\u4f7f\u7528 MJPEG \u4f86\u53d6\u4ee3 MPEG\uff0c\u539f\u56e0\u7121\u5b83\uff0c\u56e0\u70ba MJPEG \u683c\u5f0f\u7c21\u55ae\uff0c\u4f46\u7f3a\u9ede\u662f\u4e0d\u652f\u63f4\u8072\u97f3\u3002<\/p>\n

        MPEG-1 \u6a19\u6e96<\/strong><\/span><\/p>\n

        MPEG \u7684\u6a19\u6e96\u7531 ISO (International Standards Organization) \u6240\u5236\u5b9a\uff0c\u5168\u540d\u70ba Moving Pictures Experts Group (MPEG \u70ba ISO \u5de5\u4f5c)\uff0c\u9019\u4e9b\u5718\u968a\u5236\u5b9a\u4e86\u5305\u62ec MPEG-1\u3001MPEG-2\u3001MPEG-4 \u7b49\u6a19\u6e96\u3002<\/p>\n

        MPEG-1 \u7684\u6a19\u6e96\u6bd4 H.263 \u65e9\u51fa\u73fe\uff0cMPEG-1 \u5236\u5b9a\u65bc 1992 \u5e74\uff0c\u4e3b\u8981\u7528\u9014\u70ba\uff1a\u8996\u8a0a\u6703\u8b70\u3001\u5f71\u50cf\u96fb\u8a71\u3001\u96fb\u8166\u904a\u6232\u8207\u652f\u63f4\u7b2c\u4e00\u4ee3\u7684 CD-ROM\u3002MPEG-1 \u88ab\u8a2d\u8a08\u4f86\u652f\u63f4\u5927\u90e8\u4efd\u7684\u5f71\u50cf\u8207 CD-ROM \u7684\u97f3\u6548\uff0c\u50b3\u8f38\u901f\u5ea6\u70ba 1.5 Mbps (30 fps)\u3002<\/p>\n

        \u9664\u6b64\u4e4b\u5916\uff0cMPEG-1 \u4e5f\u652f\u63f4 playback\uff0c\u4f8b\u5982\u5feb\u8f49\u3001\u5012\u5e36\u6216\u662f\u8df3\u8e8d\uff0c\u9019\u4e5f\u662f MPEG-1 \u597d\u7528\u7684\u5730\u65b9\u3002\u7a0d\u5f8c\u6211\u5011\u6703\u7c21\u55ae\u4ecb\u7d39\u4e00\u4e0b MPEG-1 \u7684\u539f\u56e0\uff0c\u4ee5\u660e\u767d MPEG-1 \u5982\u4f55\u505a\u5230\u9019\u4e9b\u529f\u80fd\u3002<\/p>\n

        MPEG-2 \u6a19\u6e96<\/strong><\/span><\/p>\n

        MPEG-2 \u7684\u6a19\u6e96\u51fa\u73fe\u65bc 1994 \u5e74\uff0cMPEG-2 \u76f8\u5bb9\u65bc MPEG-1\u3002MPEG-2 \u7684\u51fa\u73fe\u4e26\u4e0d\u662f\u70ba\u4e86\u8981\u53d6\u4ee3 MPEG-1 \u7684\u820a\u6a19\u6e96\uff0c\u800c\u662f\u8981\u52a0\u5f37 MPEG-1 \u4e0d\u8db3\u7684\u5730\u65b9\u3002\u56e0\u6b64 MPEG-2 \u66f4\u80fd\u6607\u4efb\u5176\u5b83\u5de5\u4f5c\u74b0\u5883\uff0c\u4f8b\u5982 HDTV\u3001\u8996\u8a0a\u5ee3\u64ad\u3002<\/p>\n

        \u540c\u6642\uff0cMPEG-2 \u7684\u89e3\u6790\u5ea6\u4e5f\u652f\u63f4\u5230 HDTV 1280×720\u3002\u5728\u97f3\u6548\u65b9\u9762\uff0cMPEG-2 \u4e5f\u652f\u63f4\u5230 6 \u500b\u983b\u9053 (MPEG-1 \u53ea\u652f\u63f4 2 \u500b\u983b\u9053)\u3002MPEG-2 \u7684\u50b3\u8f38\u901f\u5ea6\u4e5f\u63d0\u6607\u81f3 2Mbps ~ 10 Mbps\uff0c\u56e0\u6b64\u9700\u8981 4x \u7684 CD-ROM\uff0c\u4f46\u4e5f\u56e0\u6b64 4x CD-ROM \u53ea\u80fd\u5132\u5b58 18 \u5206\u7a2e\u7684\u5f71\u50cf\uff0c\u6240\u4ee5\u6211\u5011\u5229\u7528 DVD-ROM \u4f86\u5132\u5b58 MPEG-2 \u683c\u5f0f\u7684\u5f71\u50cf\uff0c\u800c\u4e14 DVD-ROM \u4e5f\u652f\u63f4 Dolby \u97f3\u6548\u3002<\/p>\n

        MPEG-4 \u6a19\u6e96<\/strong><\/span><\/p>\n

        MPEG-4 \u7684\u6a19\u6e96\u5728 1993 \u5e74\u88ab\u63d0\u51fa\uff0c\u4e3b\u8981\u7684\u61c9\u7528\u7528\u9014\u6bd4\u8f03\u5ee3\uff0c\u5305\u62ec\uff1a\u8996\u8a0a\u6703\u8b70\u3001\u5f71\u97f3\u90f5\u4ef6\u3001\u7121\u7dda\u88dd\u7f6e\u7b49\u7b49\uff0c\u652f\u63f4\u7684\u50b3\u8f38\u901f\u5ea6\u70ba 8Kbps ~ 35Mbps\u3002<\/p>\n

        MPEG-4 \u53ef\u4ee5\u50b3\u9001\u5f71\u50cf\u7684\u7269\u4ef6\uff0c\u800c\u4e0d\u662f\u53ea\u6709\u5f71\u50cf\u7684 “frame”\uff0c\u4f8b\u5982\u4e00\u9023\u4e32\u7684\u52d5\u4f5c\u6307\u4ee4\u3002\u56e0\u6b64\uff0cMPEG-1 \u8207 MPEG-2 \u7686\u662f “frame-based” \u7684\u6a19\u6e96\uff0c\u800c MPEG-4 \u5247\u662f “object-based” \u7684\u6a19\u6e96\uff0c\u672a\u4f86\u5728\u7db2\u8def\u8207\u591a\u5a92\u9ad4\u7684\u61c9\u6703\u4e5f\u6703\u66f4\u666e\u904d\u3002<\/p>\n

        MPEG-4 \u76ee\u524d\u5728 Linux \u4e0a\u5df2\u7d93\u6709 OpenMPEG \u7684\u5c08\u6848\u8a08\u756b\uff0c\u767c\u8d77\u672c\u8a08\u756b\u7684\u76ee\u5730\u5728\u5e0c\u671b\u53ef\u4ee5\u5728 Linux \u4e0a\u767c\u5c55\u5b8c\u6574\u7684 MPEG-4 \u652f\u63f4\u74b0\u5883\u3002<\/p>\n

        Video Streaming \u7684\u7db2\u8def\u6280\u8853<\/big><\/strong><\/span><\/p>\n

        \u8981\u5efa\u7f6e\u4e00\u500b\u5b8c\u6574\u7684 Video Streaming \u74b0\u5883\uff0c\u5728\u6574\u9ad4\u4f86\u770b\uff0c\u8981\u6e96\u5099\u7684\u786c\u9ad4\u5305\u62ec\uff1a\u4f3a\u670d\u5668\u3001CCD\u3001\u5f71\u50cf\u88dc\u6349\u5361\u7b49\u7b49\uff0c\u800c\u5728\u5e95\u5c64\u7684\u6280\u8853\u9762\u65b9\u9762\uff0c\u9664\u4e86\u524d\u9762\u63d0\u5230\u7684\u5f71\u50cf\u7de8\u78bc\u6280\u8853\u5916\uff0c\u4e5f\u8981\u914d\u5408\u901a\u8a0a\u5354\u5b9a\u624d\u80fd\u5be6\u4f5c\u51fa Video Streaming \u7684\u61c9\u7528\u7a0b\u5f0f\u3002<\/p>\n

        Video Streaming \u7684\u65b9\u5f0f<\/span><\/strong><\/p>\n

        Video \u5728\u505a Streaming \u6642\uff0c\u6709\u4e09\u7a2e\u65b9\u5f0f\u53ef\u4ee5\u61c9\u7528\uff1abroadcasting\u3001unicasting\u3001multicasting\u3002<\/p>\n

        broadcasting \u7684\u65b9\u5f0f\u6bd4\u8f03\u55ae\u7d14\uff0c\u4ed6\u662f\u5728 LAN \u4e0a\u76f4\u63a5\u5c07\u4e00\u500b\u500b\u7684\u5f71\u50cf\u5c01\u5305\u4e1f\u5230\u7db2\u8def\u4e0a (server \u7aef)\uff0c\u518d\u7531 client \u7684\u61c9\u7528\u7a0b\u5f0f\u81ea\u7db2\u8def\u4e0a\u53d6\u56de\u5c01\u5305\u64ad\u653e\u3002\u4f46\u7db2\u8def\u786c\u9ad4\u5c64\u4e0a\uff0c\u4ecd\u6709\u8a31\u591a\u9700\u8981\u8003\u616e\u7684\u554f\u984c\uff0c\u4f8b\u5982\u5728 Shared Non-Switched Enthernet \u4e0a\u6642\uff0c\u5c31\u6703\u767c\u751f\u4e00\u4e9b\u5c0f\u554f\u984c\u3002<\/p>\n

        unicasting \u8207 multicasting \u90fd\u662f\u5c6c\u65bc IP \u7684\u50b3\u8f38\u65b9\u5f0f\u3002unicasting \u63a1\u53d6 1 \u5c0d 1 \u7684\u65b9\u5411\u50b3\u5f71\u50cf\u7d66\u9060\u7aef\uff0c\u7a31\u70ba Video-on-Demand (VoD)\uff0cmulticasting \u5247\u662f 1 \u5c0d\u591a\u7684\u50b3\u8f38\u65b9\u5f0f\uff0c\u7a31\u70ba Near-Video-on-Demand (NVoD)\u3002\u672a\u4f86 IPv6 \u5c07\u652f\u63f4 IP Multicasting\uff0c\u56e0\u6b64 Video Streaming \u7684\u61c9\u7528\u5c07\u66f4\u70ba\u5ee3\u6cdb\u3002<\/p>\n

        IPv6<\/strong><\/span><\/p>\n

        IPv6 \u5168\u540d\u70ba IP version 6\uff0c\u672a\u4f86\u5c07\u53d6\u4ee3\u76ee\u524d\u6240\u4f7f\u7528\u7684 IPv4\u3002IPv6 \u65b0\u589e\u8a31\u591a\u5c0d\u591a\u5a92\u9ad4\u50b3\u8f38\u7684\u652f\u63f4\uff0c\u4f8b\u5982 multicasting\u3001authentication\/encryption\u7b49\u3002\u4e0d\u904e\u76ee\u524d\u5c1a\u4ecd\u672a\u5168\u9762\u5347\u7d1a\uff0c\u6240\u4ee5\u61c9\u7528\u4ecd\u53d7\u9650\u3002<\/p>\n

        UDP \u901a\u8a0a\u5354\u5b9a<\/strong><\/span><\/p>\n

        UDP \u5168\u540d\u662f Universal Datagram Protocol\uff0cUDP \u901a\u8a0a\u5354\u5b9a\u662f Video Streaming \u7684\u57fa\u77f3\u3002UDP \u8207 TCP \u4e0d\u540c\u7684\u662f\uff0cUDP \u4e26\u6c92\u6709\u932f\u8aa4\u6aa2\u67e5\uff0c\u4e0d\u904e\u9019\u5728 Video Streaming \u7684\u61c9\u7528\u662f\u5f71\u56ae\u4e0d\u592a\u7684\u3002<\/p>\n

        RTP \u901a\u8a0a\u5354\u5b9a<\/strong><\/span><\/p>\n

        RTP \u5168\u540d\u70ba Real-Time Protocol\uff0cRTP \u662f\u5728 UDP \u5c01\u5305\u4e4b\u524d\u591a\u52a0 10 bytes \u7684\u6a94\u982d\uff0c\u88e1\u9762\u8a18\u8f09\u6709\u6642\u9593\u3001\u5e8f\u865f\u3001\u58d3\u7e2e\u578b\u614b\u7b49\u8cc7\u8a0a\u3002RTP \u662f\u76ee\u524d\u5927\u591a\u6578 Video Streaming \u8edf\u9ad4\u6240\u4f7f\u7528\u7684\u901a\u8a0a\u5354\u5b9a\u3002<\/p>\n

        RTP \u53ef\u7528\u4f86\u91dd\u5c0d\u5404\u7a2e\u4e0d\u540c\u7684\u591a\u5a92\u9ad4\u683c\u5f0f\u505a Streaming \u7684\u5de5\u4f5c\uff0c\u56e0\u70ba\u6211\u5011\u5c07\u5f71\u50cf\u5206\u89e3\u6210\u6578\u500b RTP \u5c01\u5305\u518d\u50b3\u9001\u51fa\u53bb\uff0c\u56e0\u6b64\u6703\u9047\u5230\u8a31\u591a\u7db2\u8def\u6280\u8853\u5e38\u6703\u9047\u5230\u7684\u554f\u984c\u3002\u4f8b\u5982\uff0c\u56e0\u70ba\u5c01\u5305\u9001\u9054\u7684\u6642\u9593\u4e0d\u4e00\uff0c\u9020\u6210\u64ad\u653e\u6642\u6703\u756b\u9762\u4e0d\u6d41\u66a2\u7684\u73fe\u50cf\uff0c\u56e0\u6b64\uff0c\u5728\u64ad\u767c\u6642\u5c31\u5fc5\u9808\u4f7f\u7528\u4e00\u500b\u7de9 \u885d\u5340 (playout buffer) \u4f86\u66ab\u6642\u5b58\u653e\u4e26\u8655\u7406\u7db2\u8def\u4e0a\u63a5\u53d7\u5230\u7684\u5c01\u5305\u3002<\/p>\n

        \u7531\u7db2\u8def\u4e0a\u63a5\u6536\u7684\u5f71\u50cf\u5c01\u5305\u56e0\u70ba\u5f7c\u6b64\u4e4b\u9593\u5230\u9054\u7684\u6642\u9593\u9593\u9694\u4e0d\u540c (Synchronous Data Packets)\uff0c\u6240\u4ee5\u5fc5\u9808\u5229\u7528\u7de9\u885d\u5340\u5c07\u9019\u4e9b\u5c01\u5305\u505a\u7de9\u885d\uff0c\u8b93\u5f7c\u6b64\u4e4b\u9593\u7684\u6642\u9593\u9593\u9694\u4e00\u6a23 (Isochronous Data Packets)\u3002<\/p>\n

        MPEG-1 \u7684\u539f\u7406<\/strong><\/span><\/p>\n

        MPEG-1 \u7684\u7de8\u78bc\u539f\u7406\u5927\u5bb6\u90fd\u61c9\u8a72\u8981\u8a8d\u8b58\u4e00\u4e0b\u3002MPEG-1 \u5c07\u5f71\u50cf\u5206\u6210\u4e00\u500b Group\uff0c\u5373 GOP (Group of Pictures)\uff0c\u6bcf\u500b GOP \u6709\u4e00\u500b Entry Point\uff0c\u7a31\u70ba I-frame\uff0c\u6bcf\u500b I-frame \u7684\u5927\u5c0f\u70ba 15KB\uff0c\u53e6\u5916\u9084\u6709 P-frame \u8207 B-frame\u3002<\/p>\n

        I-frame \u7a31\u70ba Independent-frame\uff0c\u70ba\u6bcf\u500b GOP \u7684\u8d77\u9ede\uff0c\u7dca\u63a5\u8457\u7684\u662f\u4e8c\u500b B-frame\uff0cB-frame \u7a31\u70ba Bi-directional frame\uff0c\u6bcf\u500b B-frame \u5927\u5c0f\u70ba 3KB\uff0c\u6bcf\u4e8c\u500b B-frame \u4e4b\u9593\u518d\u63d2\u5165\u4e00\u500b P-frame\uff0c\u5373 Predictive-frame\uff0c\u6bcf\u500b B-frame \u7684\u5927\u5c0f\u70ba 8KB\u3002<\/p>\n

        GOP \u5171\u6709\u4e09\u7a2e\u4e0d\u540c\u7684 frame\uff0c\u6bcf\u7a2e frame \u5b58\u653e\u7684\u5f71\u50cf\u8207\u6027\u8cea\u7686\u4e0d\u540c\uff0c\u9019\u5728\u4ee5\u5f8c\u6211\u5011\u5be6\u505a\u7a0b\u5f0f\u6642\u6703\u518d\u505a\u66f4\u6e05\u695a\u7684\u4ecb\u7d39\u3002\u4f8b\u5982\uff0c\u6211\u5011\u8981\u5c07\u5f71\u7247\u5feb\u8f49\u6642\uff0c\u53ef\u4ee5\u5ffd\u7565\u6389\u6240\u6709\u7684 B-frame \u8207 P-frame\uff0c\u53ea\u64a5\u653e I-frame\uff0c\u5982\u6b64\u4e00\u4f86\u4fbf\u53ef\u4ee5\u7bc0\u7701\u8a31\u591a\u8cb4\u5bf6\u7684\u7db2\u8def\u983b\u5bec\u8207\u6642\u9593\uff0c\u4f46\u524d\u63d0\u662f\uff0cI-frame \u5fc5\u9808\u5b58\u653e\u4e3b\u8981\u7684\u5f71\u50cf\u8cc7\u6599\uff0c\u4e8b\u5be6\u4e0a\u4e5f\u662f\u5982\u6b64\u3002<\/p>\n

        Video Streaming \u4f86\u7684\u6b63\u662f\u6642\u5019<\/big><\/strong><\/span><\/p>\n

        \u770b\u5230 “Video” Streaming \u5c31\u77e5\u9053\u9019\u500b\u6280\u8853\u8207\u5f71\u97f3\u6709\u95dc\u3002Video Streaming \u662f\u4e00\u7a2e\u7d93\u7531\u7db2\u8def\u4f86\u64a5\u653e\u5f71\u97f3\u6a94\u6848\u7684\u6280\u8853\uff0cVideo “Streaming” \u7684\u57fa\u672c\u6982\u5ff5\u70ba\u300c\u4e00\u908a\u4e0b\u8f09\u4e00\u908a\u64a5\u653e\u300d\uff0c\u6211\u5011\u7a31\u4e4b\u70ba\u300cPlay as received\u300d\u3002<\/p>\n

        \u7d93\u7531 Internet \u5982\u679c\u8981\u6536\u770b\u9060\u7aef\u4f3a\u670d\u5668\u7684\u96fb\u8996\u6a94\u6848\uff0c\u6700\u539f\u59cb\u7684\u505a\u70ba\u662f\u300c\u4e0b\u8f09\u5f8c\u518d\u64a5\u653e\u300d\uff0c\u4e5f\u5c31\u662f\u7d93\u7531 FTP \u6216 HTTP \u5c07\u6574\u500b\u6a94\u6848\u4e0b\u8f09\u81f3\u672c\u5730\u7aef\u5f8c\u518d\u5229\u7528\u64a5\u653e\u7a0b\u5f0f\u4f86\u64a5\u653e\uff0c\u6211\u5011\u7a31\u4e4b\u70ba\u300cPlay after download\u300d\u3002<\/p>\n

        \u4ee5\u6700\u5e38\u898b\u7684\u4f8b\u5b50\u4f86\u8b1b\uff0c\u6211\u5011\u53ef\u4ee5\u7d93\u7531\u7db2\u8def\u5c07 MP3 \u5b8c\u6574\u4e0b\u8f09\u5f8c\u518d\u64a5\u653e\uff0c\u4e5f\u5c31\u662f Play after download\uff0c\u6216\u8005\u6211\u5011\u4e5f\u53ef\u4ee5\u4e00\u908a\u4e0b\u8f09 MP3 \u4e00\u908a\u807d\u97f3\u6a02\uff0c\u9019\u7a2e\u65b9\u5f0f\u5247\u7a31\u70ba Play as received\u3002\u5176\u4ed6\u7684\u61c9\u7528\u7bc4\u4f8b\u9084\u5f88\u591a\uff0c\u4f8b\u5982\u5229\u7528 RealPlayer\u300c\u5373\u6642\u89c0\u770b\u5f71\u7247\u6216\u662f\u807d\u97f3\u6a02\u300d\uff0c\u9019\u7a2e\u5373\u6642\u64a5\u653e\u7684\u65b9\u5f0f\u5373\u662f Play as received\uff0c\u6211\u5011\u7a31\u9019\u6a23\u7684\u6280\u8853\u70ba Video Streaming Technology\u3002<\/p>\n

        \u70ba\u4ec0\u9ebc\u8aaa Video Streaming \u7684\u6280\u8853\u4f86\u7684\u6b63\u662f\u6642\u5019\u5462\uff1f\u8209\u500b\u6700\u7c21\u55ae\u7684\u60c5\u6cc1\uff0c\u4f60\u53ef\u80fd\u5728\u4e0b\u8f09 MP3 \u4e4b\u524d\u60f3\u8981\u8a66\u807d\u4e00\u4e0b\u97f3\u6a02\u7684\u5167\u5bb9\uff0c\u800c\u4e0b\u8f09\u97f3\u6a02\u7247\u6bb5\u7684\u65b9\u5f0f\u53c8\u986f\u5f97\u4e0d\u5920\u53cb\u5584\uff0c\u9019\u6642\u5982\u679c\u5229\u7528 Video Streaming \u7684\u6280\u8853\u4f86\u8b93\u7db2\u53cb\u8996\u807d\uff0c\u4e0d\u4f46\u65b9\u4fbf\uff0c\u800c\u4e14\u4e0d\u5fc5\u6d6a\u8cbb\u6642\u9593\u4f86\u4e0b\u8f09\u4e0d\u559c\u6b61\u7684\u97f3\u6a02\u7684\u3002<\/p>\n

        \u96a8\u8457\u7db2\u8def\u983b\u5bec\u7684\u6539\u9032\u8207 IPv6 \u7684\u51fa\u73fe\uff0cVideo Streaming \u7684\u61c9\u7528\u5c07\u8d8a\u4f86\u8d8a\u5ee3\u6cdb\uff0c\u5229\u7528 Video Streaming \u4f86\u8a2d\u8a08\u7684\u8cc7\u8a0a\u5bb6\u96fb\u4e5f\u6703\u8d8a\u4f86\u8d8a\u591a\uff0c\u4f8b\u5982\u8f03\u5e38\u88ab\u63d0\u53ca\u7684\u7db2\u8def\u96fb\u8a71 (InterPhone)\u3002<\/p>\n

        \u9664\u4e86\u5bec\u983b\u7db2\u8def\u7684\u666e\u53ca\u5916\uff0c\u5132\u5b58\u8a2d\u5099\u7684\u5927\u9032\u6b65\u4e5f\u662f\u52a0\u901f Video Streaming \u9032\u7528\u666e\u53ca\u7684\u6700\u5927\u52d5\u529b\uff0c\u4f8b\u5982\u5229\u7528 Linux \u8a2d\u8a08\u7684 NAS \u53ef\u4ee5\u88ab\u7528\u4f86\u7576\u505a\u5927\u578b\u7684\u5f71\u97f3\u4f3a\u670d\u5668\u6216\u662f\u52d5\u614b\u96fb\u5f71\u8cc7\u6599\u5eab (DMD)\u3002<\/p>\n

        VCD & MPEG-1<\/big><\/strong><\/span><\/p>\n

        \u8981\u63d0\u5230\u64a5\u653e\u52d5\u614b\u5f71\u97f3\u7684\u5148\u8ec0\uff0c\u7d55\u5c0d\u8981\u5148\u5f9e VCD \u8aaa\u8d77\uff0c\u56e0\u70ba\u9019\u662f\u5728\u96fb\u8166\u51fa\u73fe\u5f8c\uff0c\u6700\u80fd\u6df1\u5165\u6d88\u8cbb\u8005\u5e02\u5834\u7684\u7522\u54c1\u3002<\/p>\n

        \u60f3\u7576\u5e74\uff0c\u8981\u64a5\u653e VCD \u9664\u4e86\u8981\u6709\u4e00\u53f0\u7576\u6642\u7b97\u662f\u9ad8\u64cb\u8ca8\u7684 1x CD-ROM \u5916\uff0c\u9084\u8981\u518d\u53e6\u5916\u52a0\u88dd\u4e5f\u662f\u9ad8\u64cb\u8ca8\u7684 MPEG \u5361\u3002\u64a5\u653e VCD \u5176\u5be6\u5c31\u662f Video Streaming \u7684\u6280\u8853\uff0c\u56e0\u70ba VCD \u7684\u8cc7\u6599\u662f\u4e00\u908a\u8b80\u53d6\u4e00\u908a\u64a5\u653e\uff0c\u90a3\u70ba\u4ec0\u9ebc\u8981\u6709 MPEG Card \u5462\uff1f\u7406\u6240\u7576\u7136\u7684\uff0c\u9019\u662f\u56e0\u70baMPEG-1 \u7684\u6a19\u6e96\u3002<\/p>\n

        MPEG-1 \u88ab\u8a2d\u8a08\u5728 1x CD-ROM \u4e0a\u64a5\u653e VCD\uff0c\u800c VCD \u4e0a\u7684\u8cc7\u6599\u5fc5\u9808\u7d93\u7531 MPEG Card \u89e3\u78bc (decode) \u5f8c\u624d\u80fd\u64a5\u653e\u3002\u4f46\u662f\u96a8\u8457\u786c\u9ad4\u7684\u9032\u6b65\uff0c\u73fe\u5728\u53ef\u4ee5\u7d93\u7531\u8edf\u9ad4\u4f86\u505a MPEG-1 \u89e3\u78bc\u7684\u5de5\u4f5c\u3002\u6211\u5011\u5c07\u5728\u5f8c\u6587\u4ecb\u7d39 MPEG-1 \u7684\u8a2d\u8a08\u6982\u5ff5\u3002<\/p>\n

        DVD & MPEG-2<\/big><\/strong><\/span><\/p>\n

        MPEG-2 \u5e38\u88ab\u63d0\u5230\u5247\u662f\u7531\u65bc DVD \u7684\u6d41\u884c\u3002\u4e0d\u7ba1\u662f MPEG-1 \u6216\u662f MPEG-2\uff0c\u5176\u5be6\u662f\u4e00\u7a2e\u7de8\u78bc\u7684\u6280\u8853\uff0c\u800c DVD-ROM \u5247\u662f\u9078\u64c7\u4e86 MPEG-2 \u4f86\u7576\u505a\u5b83\u7684\u58d3\u7e2e\u6a19\u6e96\u3002<\/p>\n

        \u800c DVD \u4e4b\u6240\u4ee5\u7121\u6cd5\u50cf VCD \u4e00\u6a23\u80fd\u88ab\u300c\u5099\u4efd\u5230\u786c\u789f\u300d\uff0c\u5247\u662f\u7531\u65bc\u5176\u4e2d\u53c8\u52a0\u9032\u4e86\u4e09\u9053\u7684\u4fdd\u8b77\uff0c\u7b2c\u4e8c\u9053\u4fdd\u8b77\u5c31\u662f\u73a9\u5bb6\u5011\u8033\u719f\u80fd\u8a73\u7684 CSS\u3002\u5728 Linux \u4e0b\u4e4b\u6240\u4ee5\u7121\u6cd5\u6709\u300c\u5408\u6cd5\u300d\u7684 DVD Player\uff0c\u5c31\u662f\u53d7\u5236\u65bc CSS \u7684\u95dc\u4fc2\u3002<\/p>\n

        \u5229\u7528 NAS \u4f86\u8a2d\u8a08 Video Server\uff0c\u8981\u5132\u5b58\u4e26\u5ee3\u64a5 VCD \u5df2\u7d93\u6c92\u6709\u6280\u8853\u4e0a\u7684\u969c\u7919\uff0c\u4f46\u662f\u8981\u5132\u5b58\u4e26\u64f4\u64a5 DVD\uff0c\u5247\u6709\u6cd5\u5f8b\u4e0a\u7684\u554f\u984c\uff0c\u9019\u9ede\u662f\u503c\u5f97\u6211\u5011\u6df1\u601d\u7684\u4e00\u500b\u554f\u984c\u3002\u56e0\u70ba\u76ee\u524d CSS \u7684\u6280\u8853\u638c\u63e1\u5728\u65e5\u672c\u4eba\u624b\u88cf\uff0c\u8981\u53d6\u5f97\u9019\u9805\u6280\u8853\u5fc5\u9808\u7c3d\u7f72 NDA\uff0c\u4e0d\u904e CSS \u4e26\u975e\u4e0d\u53ef\u7834\u89e3\u60f3\u5fc5\u5927\u5bb6\u90fd\u77e5\u9053\uff0c\u4f46\u662f\u5c31\u662f\u6709\u7248\u6b0a\u4e0a\u7684\u554f\u984c\u3002<\/p>\n

        \u5f71\u50cf\u7de8\u78bc\u6280\u8853\u4ecb\u7d39<\/big><\/strong><\/span><\/p>\n

        \u76ee\u524d\u5b78\u8853\u754c\u5df2\u7d93\u767c\u5c55\u51fa\u8a31\u591a\u8655\u7406\u5f71\u50cf\u8a0a\u865f\u58d3\u7e2e\u53ca\u7de8\u78bc\u7684\u6280\u8853 (codecs)\uff0c\u8ac7\u5230\u9019\u4e9b\u6280\u8853\uff0c\u61c9\u7528\u6700\u5ee3\u6cdb\u7684\u7de8\u78bc\u6a19\u6e96\u5e95\u4e0b\u56db\u7a2e\uff1a<\/p>\n

          \n
        1. ) H.261<\/li>\n
        2. ) H.263<\/li>\n
        3. ) JPEG, MJPEG<\/li>\n
        4. ) MPEG<\/li>\n<\/ol>\n

          \u5e95\u4e0b\u5c07\u5206\u5225\u7c21\u55ae\u4ecb\u7d39\u9019\u56db\u7a2e\u7de8\u78bc\u6280\u8853\u3002<\/p>\n

          H.261 \u6a19\u6e96<\/span><\/strong><\/p>\n

          H.261 \u7684\u5f71\u50cf\u7de8\u78bc\u6a19\u6e96\u51fa\u73fe\u5728 1990 \u5e74\u7684 ITU\u3002\u4e00\u958b\u59cb\u7684\u7528\u9014\u4e3b\u8981\u662f\u652f\u63f4\u5f71\u50cf\u96fb\u8a71 (video phone) \u8207\u8996\u8a0a\u6703\u8b70 (video conferencing)\u3002H.261 \u7684\u683c\u5f0f\u6709\u4e8c\u7a2e\uff0c\u5206\u5225\u6709\u4e0d\u540c\u7684\u89e3\u6790\u5ea6\uff1a<\/p>\n

            \n
          1. ) QCIF\uff1a176×144<\/li>\n
          2. ) CIF\uff1a352×288<\/li>\n<\/ol>\n

            H.261 \u7684 fps (frames per second) \u53ef\u4ee5\u9054\u5230 7.5, 10, 15 \u8207 30 fps\u3002\u7531\u65bc H.261 \u4e00\u958b\u59cb\u662f\u67b6\u69cb\u5728 ISDN B \u4e0a\u9762\uff0c\u800c ISDN B \u7684\u50b3\u8f38\u901f\u5ea6\u70ba 64 Kbps\uff0c\u6240\u4ee5 H.261 \u4e5f\u88ab\u7a31\u70ba Px64 (x = 1 to 30)\u3002<\/p>\n

            CIF \u5168\u540d\u70ba (Common Intermediate Format)\uff0c\u4e3b\u8981\u662f\u70ba\u4e86\u8981\u652f\u63f4\u5404\u7a2e\u4e0d\u540c\u89e3\u6790\u5ea6\u7684\u96fb\u5f71\u800c\u88ab\u5b9a\u7fa9\u51fa\u4f86\uff0c\u4f8b\u5982 NTSC, PAL, SECAM \u96fb\u8996\u7cfb\u7d71\u3002\u800c QCIF \u5247\u662f Quarter-CIF \u4e5f\u5c31\u662f CIF \u89e3\u6790\u5ea6\u7684\u4e00\u534a\u3002<\/p>\n

            \u9664\u6b64\u4e4b\u5916\uff0cH.261 \u4e5f\u53ef\u4ee5\u8aaa\u662f MPEG-1 \u6a19\u6e96\u7684\u524d\u8f29\u3002<\/p>\n

            H.263 \u6a19\u6e96<\/strong><\/span><\/p>\n

            H.263 \u662f H.261 \u7684\u52a0\u5f37\u7248\uff0c\u8a95\u751f\u65bc 1994 \u5e74 (ITU)\u3002H.263 \u958b\u59cb\u652f\u63f4 PSTN\uff0c\u4e0d\u904e\u8981\u7279\u5225\u8aaa\u660e\u4e00\u9ede\uff0cH.263 \u6bd4 MPEG-1 \u9084\u8981\u665a\u51fa\u73fe\uff0c\u800c\u4e14 H.263 \u9084\u662f\u57fa\u65bc MPEG-1 \u800c\u767c\u5c55\u3002<\/p>\n

            H.263 \u7684\u6a19\u6e96\u5171\u652f\u63f4\u4e94\u7a2e\u4e0d\u540c\u7684\u89e3\u6790\u5ea6\uff0c\u5206\u5225\u70ba\uff1a<\/p>\n

              \n
            1. ) Sub-QCIF\uff1a128×96<\/li>\n
            2. ) QCIF\uff1a176×144<\/li>\n
            3. ) CIF\uff1a352×288<\/li>\n
            4. ) 4CIF\uff1a704×576<\/li>\n
            5. ) 16CIF\uff1a1408×1152<\/li>\n<\/ol>\n

              \u50b3\u8f38\u901f\u5ea6\u70ba 8 Kbps ~ 1.5 Mbps\u3002\u9664\u6b64\u4e4b\u5916\uff0cH.263 \u4e5f\u662f MPEG-4 \u6a19\u6e96\u7684\u57fa\u790e\u3002<\/p>\n

              JPEG<\/strong><\/span><\/p>\n

              \u63d0\u5230 JPEG \u7684\u6a19\u6e96\uff0c\u5927\u5bb6\u53ef\u5c31\u4e0d\u83ab\u751f\u4e86\uff0c\u7531\u5176\u662f\u5728 GIF \u767c\u51fa\u7981\u4ee4\u5f8c\uff0cJPEG \u66f4\u662f\u88ab\u5ee3\u6cdb\u61c9\u7528\u3002JPEG \u7684\u5168\u540d\u5927\u5bb6\u4e00\u5b9a\u4e0d\u83ab\u751f\uff0c\u4ed6\u53ef\u662f\u8d6b\u8d6b\u6709\u540d\u7684\u4e00\u7fa4\u6280\u8853\u5718\u968a\u7684\u7e2e\u5beb – Joint Photographic Experts Group\u3002<\/p>\n

              JPEG \u662f 24-bit \u7684 “true-color” \u5f71\u50cf\u6a19\u6e96\uff0cJPEG \u7684\u5de5\u4f5c\u662f\u5c07 RGB \u683c\u5f0f\u7684\u5f71\u50cf\u8f49\u63db\u6210 YCrCB \u683c\u5f0f\uff0c\u76ee\u7684\u662f\u70ba\u4e86\u6e1b\u5c11\u6a94\u6848\u5927\u5c0f\uff0c\u4e00\u822c\u7d04\u53ef\u6e1b\u5c11 1\/3 ~ 1\/2 \u5de6\u53f3\u3002<\/p>\n

              \u4e0d\u904e MJPEG \u624d\u662f\u6211\u5011\u7684\u4e3b\u89d2\uff0cMJPEG \u5168\u540d\u70ba “Motion” JPEG\uff0c\u4e5f\u5c31\u662f\u6703\u52d5\u7684 JPEG \u5716\u6a94\u3002\u8a31\u591a Video Streaming \u7684\u5834\u5408\uff0c\u50cf\u662f\u7c21\u55ae\u7684\u8996\u8a0a\u6703\u8b70\u8edf\u9ad4\u90fd\u6703\u4f7f\u7528 MJPEG \u4f86\u53d6\u4ee3 MPEG\uff0c\u539f\u56e0\u7121\u5b83\uff0c\u56e0\u70ba MJPEG \u683c\u5f0f\u7c21\u55ae\uff0c\u4f46\u7f3a\u9ede\u662f\u4e0d\u652f\u63f4\u8072\u97f3\u3002<\/p>\n

              MPEG-1 \u6a19\u6e96<\/strong><\/span><\/p>\n

              MPEG \u7684\u6a19\u6e96\u7531 ISO (International Standards Organization) \u6240\u5236\u5b9a\uff0c\u5168\u540d\u70ba Moving Pictures Experts Group (MPEG \u70ba ISO \u5de5\u4f5c)\uff0c\u9019\u4e9b\u5718\u968a\u5236\u5b9a\u4e86\u5305\u62ec MPEG-1\u3001MPEG-2\u3001MPEG-4 \u7b49\u6a19\u6e96\u3002<\/p>\n

              MPEG-1 \u7684\u6a19\u6e96\u6bd4 H.263 \u65e9\u51fa\u73fe\uff0cMPEG-1 \u5236\u5b9a\u65bc 1992 \u5e74\uff0c\u4e3b\u8981\u7528\u9014\u70ba\uff1a\u8996\u8a0a\u6703\u8b70\u3001\u5f71\u50cf\u96fb\u8a71\u3001\u96fb\u8166\u904a\u6232\u8207\u652f\u63f4\u7b2c\u4e00\u4ee3\u7684 CD-ROM\u3002MPEG-1 \u88ab\u8a2d\u8a08\u4f86\u652f\u63f4\u5927\u90e8\u4efd\u7684\u5f71\u50cf\u8207 CD-ROM \u7684\u97f3\u6548\uff0c\u50b3\u8f38\u901f\u5ea6\u70ba 1.5 Mbps (30 fps)\u3002<\/p>\n

              \u9664\u6b64\u4e4b\u5916\uff0cMPEG-1 \u4e5f\u652f\u63f4 playback\uff0c\u4f8b\u5982\u5feb\u8f49\u3001\u5012\u5e36\u6216\u662f\u8df3\u8e8d\uff0c\u9019\u4e5f\u662f MPEG-1 \u597d\u7528\u7684\u5730\u65b9\u3002\u7a0d\u5f8c\u6211\u5011\u6703\u7c21\u55ae\u4ecb\u7d39\u4e00\u4e0b MPEG-1 \u7684\u539f\u56e0\uff0c\u4ee5\u660e\u767d MPEG-1 \u5982\u4f55\u505a\u5230\u9019\u4e9b\u529f\u80fd\u3002<\/p>\n

              MPEG-2 \u6a19\u6e96<\/strong><\/span><\/p>\n

              MPEG-2 \u7684\u6a19\u6e96\u51fa\u73fe\u65bc 1994 \u5e74\uff0cMPEG-2 \u76f8\u5bb9\u65bc MPEG-1\u3002MPEG-2 \u7684\u51fa\u73fe\u4e26\u4e0d\u662f\u70ba\u4e86\u8981\u53d6\u4ee3 MPEG-1 \u7684\u820a\u6a19\u6e96\uff0c\u800c\u662f\u8981\u52a0\u5f37 MPEG-1 \u4e0d\u8db3\u7684\u5730\u65b9\u3002\u56e0\u6b64 MPEG-2 \u66f4\u80fd\u6607\u4efb\u5176\u5b83\u5de5\u4f5c\u74b0\u5883\uff0c\u4f8b\u5982 HDTV\u3001\u8996\u8a0a\u5ee3\u64ad\u3002<\/p>\n

              \u540c\u6642\uff0cMPEG-2 \u7684\u89e3\u6790\u5ea6\u4e5f\u652f\u63f4\u5230 HDTV 1280×720\u3002\u5728\u97f3\u6548\u65b9\u9762\uff0cMPEG-2 \u4e5f\u652f\u63f4\u5230 6 \u500b\u983b\u9053 (MPEG-1 \u53ea\u652f\u63f4 2 \u500b\u983b\u9053)\u3002MPEG-2 \u7684\u50b3\u8f38\u901f\u5ea6\u4e5f\u63d0\u6607\u81f3 2Mbps ~ 10 Mbps\uff0c\u56e0\u6b64\u9700\u8981 4x \u7684 CD-ROM\uff0c\u4f46\u4e5f\u56e0\u6b64 4x CD-ROM \u53ea\u80fd\u5132\u5b58 18 \u5206\u7a2e\u7684\u5f71\u50cf\uff0c\u6240\u4ee5\u6211\u5011\u5229\u7528 DVD-ROM \u4f86\u5132\u5b58 MPEG-2 \u683c\u5f0f\u7684\u5f71\u50cf\uff0c\u800c\u4e14 DVD-ROM \u4e5f\u652f\u63f4 Dolby \u97f3\u6548\u3002<\/p>\n

              MPEG-4 \u6a19\u6e96<\/strong><\/span><\/p>\n

              MPEG-4 \u7684\u6a19\u6e96\u5728 1993 \u5e74\u88ab\u63d0\u51fa\uff0c\u4e3b\u8981\u7684\u61c9\u7528\u7528\u9014\u6bd4\u8f03\u5ee3\uff0c\u5305\u62ec\uff1a\u8996\u8a0a\u6703\u8b70\u3001\u5f71\u97f3\u90f5\u4ef6\u3001\u7121\u7dda\u88dd\u7f6e\u7b49\u7b49\uff0c\u652f\u63f4\u7684\u50b3\u8f38\u901f\u5ea6\u70ba 8Kbps ~ 35Mbps\u3002<\/p>\n

              MPEG-4 \u53ef\u4ee5\u50b3\u9001\u5f71\u50cf\u7684\u7269\u4ef6\uff0c\u800c\u4e0d\u662f\u53ea\u6709\u5f71\u50cf\u7684 “frame”\uff0c\u4f8b\u5982\u4e00\u9023\u4e32\u7684\u52d5\u4f5c\u6307\u4ee4\u3002\u56e0\u6b64\uff0cMPEG-1 \u8207 MPEG-2 \u7686\u662f “frame-based” \u7684\u6a19\u6e96\uff0c\u800c MPEG-4 \u5247\u662f “object-based” \u7684\u6a19\u6e96\uff0c\u672a\u4f86\u5728\u7db2\u8def\u8207\u591a\u5a92\u9ad4\u7684\u61c9\u6703\u4e5f\u6703\u66f4\u666e\u904d\u3002<\/p>\n

              MPEG-4 \u76ee\u524d\u5728 Linux \u4e0a\u5df2\u7d93\u6709 OpenMPEG \u7684\u5c08\u6848\u8a08\u756b\uff0c\u767c\u8d77\u672c\u8a08\u756b\u7684\u76ee\u5730\u5728\u5e0c\u671b\u53ef\u4ee5\u5728 Linux \u4e0a\u767c\u5c55\u5b8c\u6574\u7684 MPEG-4 \u652f\u63f4\u74b0\u5883\u3002<\/p>\n

              Video Streaming \u7684\u7db2\u8def\u6280\u8853<\/big><\/strong><\/span><\/p>\n

              \u8981\u5efa\u7f6e\u4e00\u500b\u5b8c\u6574\u7684 Video Streaming \u74b0\u5883\uff0c\u5728\u6574\u9ad4\u4f86\u770b\uff0c\u8981\u6e96\u5099\u7684\u786c\u9ad4\u5305\u62ec\uff1a\u4f3a\u670d\u5668\u3001CCD\u3001\u5f71\u50cf\u88dc\u6349\u5361\u7b49\u7b49\uff0c\u800c\u5728\u5e95\u5c64\u7684\u6280\u8853\u9762\u65b9\u9762\uff0c\u9664\u4e86\u524d\u9762\u63d0\u5230\u7684\u5f71\u50cf\u7de8\u78bc\u6280\u8853\u5916\uff0c\u4e5f\u8981\u914d\u5408\u901a\u8a0a\u5354\u5b9a\u624d\u80fd\u5be6\u4f5c\u51fa Video Streaming \u7684\u61c9\u7528\u7a0b\u5f0f\u3002<\/p>\n

              Video Streaming \u7684\u65b9\u5f0f<\/span><\/strong><\/p>\n

              Video \u5728\u505a Streaming \u6642\uff0c\u6709\u4e09\u7a2e\u65b9\u5f0f\u53ef\u4ee5\u61c9\u7528\uff1abroadcasting\u3001unicasting\u3001multicasting\u3002<\/p>\n

              broadcasting \u7684\u65b9\u5f0f\u6bd4\u8f03\u55ae\u7d14\uff0c\u4ed6\u662f\u5728 LAN \u4e0a\u76f4\u63a5\u5c07\u4e00\u500b\u500b\u7684\u5f71\u50cf\u5c01\u5305\u4e1f\u5230\u7db2\u8def\u4e0a (server \u7aef)\uff0c\u518d\u7531 client \u7684\u61c9\u7528\u7a0b\u5f0f\u81ea\u7db2\u8def\u4e0a\u53d6\u56de\u5c01\u5305\u64ad\u653e\u3002\u4f46\u7db2\u8def\u786c\u9ad4\u5c64\u4e0a\uff0c\u4ecd\u6709\u8a31\u591a\u9700\u8981\u8003\u616e\u7684\u554f\u984c\uff0c\u4f8b\u5982\u5728 Shared Non-Switched Enthernet \u4e0a\u6642\uff0c\u5c31\u6703\u767c\u751f\u4e00\u4e9b\u5c0f\u554f\u984c\u3002<\/p>\n

              unicasting \u8207 multicasting \u90fd\u662f\u5c6c\u65bc IP \u7684\u50b3\u8f38\u65b9\u5f0f\u3002unicasting \u63a1\u53d6 1 \u5c0d 1 \u7684\u65b9\u5411\u50b3\u5f71\u50cf\u7d66\u9060\u7aef\uff0c\u7a31\u70ba Video-on-Demand (VoD)\uff0cmulticasting \u5247\u662f 1 \u5c0d\u591a\u7684\u50b3\u8f38\u65b9\u5f0f\uff0c\u7a31\u70ba Near-Video-on-Demand (NVoD)\u3002\u672a\u4f86 IPv6 \u5c07\u652f\u63f4 IP Multicasting\uff0c\u56e0\u6b64 Video Streaming \u7684\u61c9\u7528\u5c07\u66f4\u70ba\u5ee3\u6cdb\u3002<\/p>\n

              IPv6<\/strong><\/span><\/p>\n

              IPv6 \u5168\u540d\u70ba IP version 6\uff0c\u672a\u4f86\u5c07\u53d6\u4ee3\u76ee\u524d\u6240\u4f7f\u7528\u7684 IPv4\u3002IPv6 \u65b0\u589e\u8a31\u591a\u5c0d\u591a\u5a92\u9ad4\u50b3\u8f38\u7684\u652f\u63f4\uff0c\u4f8b\u5982 multicasting\u3001authentication\/encryption\u7b49\u3002\u4e0d\u904e\u76ee\u524d\u5c1a\u4ecd\u672a\u5168\u9762\u5347\u7d1a\uff0c\u6240\u4ee5\u61c9\u7528\u4ecd\u53d7\u9650\u3002<\/p>\n

              UDP \u901a\u8a0a\u5354\u5b9a<\/strong><\/span><\/p>\n

              UDP \u5168\u540d\u662f Universal Datagram Protocol\uff0cUDP \u901a\u8a0a\u5354\u5b9a\u662f Video Streaming \u7684\u57fa\u77f3\u3002UDP \u8207 TCP \u4e0d\u540c\u7684\u662f\uff0cUDP \u4e26\u6c92\u6709\u932f\u8aa4\u6aa2\u67e5\uff0c\u4e0d\u904e\u9019\u5728 Video Streaming \u7684\u61c9\u7528\u662f\u5f71\u56ae\u4e0d\u592a\u7684\u3002<\/p>\n

              RTP \u901a\u8a0a\u5354\u5b9a<\/strong><\/span><\/p>\n

              RTP \u5168\u540d\u70ba Real-Time Protocol\uff0cRTP \u662f\u5728 UDP \u5c01\u5305\u4e4b\u524d\u591a\u52a0 10 bytes \u7684\u6a94\u982d\uff0c\u88e1\u9762\u8a18\u8f09\u6709\u6642\u9593\u3001\u5e8f\u865f\u3001\u58d3\u7e2e\u578b\u614b\u7b49\u8cc7\u8a0a\u3002RTP \u662f\u76ee\u524d\u5927\u591a\u6578 Video Streaming \u8edf\u9ad4\u6240\u4f7f\u7528\u7684\u901a\u8a0a\u5354\u5b9a\u3002<\/p>\n

              RTP \u53ef\u7528\u4f86\u91dd\u5c0d\u5404\u7a2e\u4e0d\u540c\u7684\u591a\u5a92\u9ad4\u683c\u5f0f\u505a Streaming \u7684\u5de5\u4f5c\uff0c\u56e0\u70ba\u6211\u5011\u5c07\u5f71\u50cf\u5206\u89e3\u6210\u6578\u500b RTP \u5c01\u5305\u518d\u50b3\u9001\u51fa\u53bb\uff0c\u56e0\u6b64\u6703\u9047\u5230\u8a31\u591a\u7db2\u8def\u6280\u8853\u5e38\u6703\u9047\u5230\u7684\u554f\u984c\u3002\u4f8b\u5982\uff0c\u56e0\u70ba\u5c01\u5305\u9001\u9054\u7684\u6642\u9593\u4e0d\u4e00\uff0c\u9020\u6210\u64ad\u653e\u6642\u6703\u756b\u9762\u4e0d\u6d41\u66a2\u7684\u73fe\u50cf\uff0c\u56e0\u6b64\uff0c\u5728\u64ad\u767c\u6642\u5c31\u5fc5\u9808\u4f7f\u7528\u4e00\u500b\u7de9 \u885d\u5340 (playout buffer) \u4f86\u66ab\u6642\u5b58\u653e\u4e26\u8655\u7406\u7db2\u8def\u4e0a\u63a5\u53d7\u5230\u7684\u5c01\u5305\u3002<\/p>\n

              \u7531\u7db2\u8def\u4e0a\u63a5\u6536\u7684\u5f71\u50cf\u5c01\u5305\u56e0\u70ba\u5f7c\u6b64\u4e4b\u9593\u5230\u9054\u7684\u6642\u9593\u9593\u9694\u4e0d\u540c (Synchronous Data Packets)\uff0c\u6240\u4ee5\u5fc5\u9808\u5229\u7528\u7de9\u885d\u5340\u5c07\u9019\u4e9b\u5c01\u5305\u505a\u7de9\u885d\uff0c\u8b93\u5f7c\u6b64\u4e4b\u9593\u7684\u6642\u9593\u9593\u9694\u4e00\u6a23 (Isochronous Data Packets)\u3002<\/p>\n

              MPEG-1 \u7684\u539f\u7406<\/strong><\/span><\/p>\n

              MPEG-1 \u7684\u7de8\u78bc\u539f\u7406\u5927\u5bb6\u90fd\u61c9\u8a72\u8981\u8a8d\u8b58\u4e00\u4e0b\u3002MPEG-1 \u5c07\u5f71\u50cf\u5206\u6210\u4e00\u500b Group\uff0c\u5373 GOP (Group of Pictures)\uff0c\u6bcf\u500b GOP \u6709\u4e00\u500b Entry Point\uff0c\u7a31\u70ba I-frame\uff0c\u6bcf\u500b I-frame \u7684\u5927\u5c0f\u70ba 15KB\uff0c\u53e6\u5916\u9084\u6709 P-frame \u8207 B-frame\u3002<\/p>\n

              I-frame \u7a31\u70ba Independent-frame\uff0c\u70ba\u6bcf\u500b GOP \u7684\u8d77\u9ede\uff0c\u7dca\u63a5\u8457\u7684\u662f\u4e8c\u500b B-frame\uff0cB-frame \u7a31\u70ba Bi-directional frame\uff0c\u6bcf\u500b B-frame \u5927\u5c0f\u70ba 3KB\uff0c\u6bcf\u4e8c\u500b B-frame \u4e4b\u9593\u518d\u63d2\u5165\u4e00\u500b P-frame\uff0c\u5373 Predictive-frame\uff0c\u6bcf\u500b B-frame \u7684\u5927\u5c0f\u70ba 8KB\u3002<\/p>\n

              GOP \u5171\u6709\u4e09\u7a2e\u4e0d\u540c\u7684 frame\uff0c\u6bcf\u7a2e frame \u5b58\u653e\u7684\u5f71\u50cf\u8207\u6027\u8cea\u7686\u4e0d\u540c\uff0c\u9019\u5728\u4ee5\u5f8c\u6211\u5011\u5be6\u505a\u7a0b\u5f0f\u6642\u6703\u518d\u505a\u66f4\u6e05\u695a\u7684\u4ecb\u7d39\u3002\u4f8b\u5982\uff0c\u6211\u5011\u8981\u5c07\u5f71\u7247\u5feb\u8f49\u6642\uff0c\u53ef\u4ee5\u5ffd\u7565\u6389\u6240\u6709\u7684 B-frame \u8207 P-frame\uff0c\u53ea\u64a5\u653e I-frame\uff0c\u5982\u6b64\u4e00\u4f86\u4fbf\u53ef\u4ee5\u7bc0\u7701\u8a31\u591a\u8cb4\u5bf6\u7684\u7db2\u8def\u983b\u5bec\u8207\u6642\u9593\uff0c\u4f46\u524d\u63d0\u662f\uff0cI-frame \u5fc5\u9808\u5b58\u653e\u4e3b\u8981\u7684\u5f71\u50cf\u8cc7\u6599\uff0c\u4e8b\u5be6\u4e0a\u4e5f\u662f\u5982\u6b64\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

              \u539f\u59cb\u8cc7\u6599\u4f86\u6e90:j2h\u8ad6\u58c7 Video Streaming \u7684\u6280\u8853\u5df2\u7d93\u51fa\u73fe\u591a\u5e74\uff0c\u5728 Internet \u4e0a\u7684\u61c9\u7528\u4e5f…<\/span><\/p>\n

              Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-141","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/141","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=141"}],"version-history":[{"count":0,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/141\/revisions"}],"wp:attachment":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=141"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=141"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=141"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}