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监控系统中什么是主码流什么是子码流?它们有什么区别?

GAOQINGWANGLUOSHEXIANGJICHANPINBIANMAQIDOUHUICHANSHENGLIANGGEBIANMAGESHI,CHENGWEIZHUMALIUHEZIMALIU。ZHEIJIUJIAOSHUANGMALIUJISHU。MUDESHIYONGYUJIEJUEJIANKONGLUXIANGDEBENDICUNCHUHEWANGLUOCHUANSHUDETUXIANGDEZHILIANGWENTI。NEIMEZHUMALIUHEZIMALIUYOUSHENMEQUBIEHELIANXINI?JINTIANWOMENJIULAITANTAOYIXIAZHUMALIUHEZIMALIUZAIJIANKONGXITONGZHONGFENBIEQIDAOSHENMEYANGDEZUOYONG,YIJIWANGLUOJIANKONGCUNCHULIANGSHIRUHEJISUANDE?


YI、ZHUMALIUYUZIMALIUDEQUBIE

HAIKANGWEISHISHOUJIATICHULEZHUMALIUYUZIMALIUZHEIYANGDEGAINIAN,SHIWEILEJIEJUEZAIWANGLUOQINGKUANGBUHAOSHIWEILEMANZUYUANCHENGYULANDELIUCHANGXINGJIANGDIMALV,ERBUYINGXIANGBENDILUXIANGTICHUDESHUANGMALIUJISHU,JIYILUSHIPINJINRUNVRHOU,NVRKEYIBIANMATIGONGLIANGZHONGMALIU,ZHUMALIUHEZIMALIU,ZHUMALIUFENBIANLVGAOYUZIMALIU,ZHUMALIUYONGLAILUXIANG,ZIMALIUYONGLAIWANGCHUAN。

SHUANGMALIUNENGSHIXIANBENDIHEYUANCHENGCHUANSHUDELIANGZHONGBUTONGDEDAIKUANMALIUXUQIU,BENDICHUANSHUKEYIYONGZHUMALIU,NENGHUODEGENGQINGXIDECUNCHULUXIANG,YUANCHENGCHUANSHUJIUYINWEIDAIKUANXIANZHIDEYUANYIN,ERSHIYONGZIMALIULAIHUODELIUCHANGDETUXIANGHELUXIANG。

当一路视频进入录像机后,录像机可以编码提供了主码流和子码流两种码流,主码流用来本地录像,子码流用来网络传输。默认是录像机本地访问,自动主码流显示。远程访问自动子码流显示,所以当你远程监控访问时出现卡顿,可以尝试通过降低子码流来解决。

ZHUMALIUYIBANMALIUJIAODA,QINGXIDUGAO,ZHANYONGDEDAIKUANYEJIUGAO。ZIMALIUZAIZHUMALIUDETUXIANGHUANJINGXIAJIANGDILETUXIANGGESHI,QINGXIDUJIAOZHUMALIUYAODI,ZHANYONGDAIKUANXIAO。ZHUMALIUYIBANYONGYUCUNCHU,ZIMALIUYONGYUWANGCHUAN。ZHUMALIUBENDICUNCHU,ZIMALIUSHIYONGYUTUXIANGZAIDIDAIKUANWANGLUOSHANGCHUANSHU。

这样做的目的是当我们用子码流预览时如果网络状况不是很好,可以降低子码流的码率(随着位率的降低画质会有降低),以达到改善网络浏览的流畅性,而又不改变本地录像的录像效果。

知道了上述理论,就可以明白为什么老是有人在问这样的问题:为什么视频监控使用子码流图像模糊?

WEISHENMEWANGLUOSHEXIANGJIYIYONGZHUMALIUJIUTUOPING,ZIMALIUJIUMEIWENTI?

ZHUMALIUSHIZUIGAOXIANGSUFENBIANLVMOSHI,CIMALIUSHIDIXIANGSUDIFENBIANLVMOSHI。

XUANZEZHUMALIUSHI,HUAZHIGAO,DUIDAIKUANYAOQIUYEGAO,RUCHUXIANHUAMIANTUOPINGHUOZHECHUXIANDUANCENGKAHUAMIANJIUSHIWANGLUOCHUANSHUBUGUOLAI,ZHEIYANGDEQINGKUANGJIEJUEBANFA:

1、XUANZEZIMALIU,DIHUAZHI,TIGAOHUAMIANCHUANSHUDELIUCHANGDU

2、ZAISHEZHIHOUTAI,JIANGMALIUDUIYINGDEZHENLVDIAODI,FENBIANLVDIAODI,ZHEIYANGKEYIJIANGDIDAIKUANXUQIU 。

3、TIGAOWANGLUODAIKUAN,MANZUGAOHUAZHICHUANSHUXUQIU。

ER、RUHEKUAISUDEJISUANSHEXIANGTOUYITIANCUNCHULIANG

SHANGMIANWOMENYIJINGLEJIELEZHUMALIUYUZIMALIUDEQUBIELE,NEIMERUHELAIJISUANYIGESHEXIANGTOUYITIANDECUNCHULIANGNI?ZHEIGEQISHISHIYIGECHANGTANDEWENTI,RENGRANYOUBUSHAOPENGYOUZAIWOMENRUODIANXINGYEWANGHOUTAILIUYANWENDAO,ZHEILIMIANWOMENZAILAIZONGJIESHIDELEJIEXIA,ZHAOGEKUAISUYIJIDEFANGFA。

SHEXIANGJIDEMALIUJIJIANKONGSHIPINLIUDEDAIKUAN,FENWEIZHUMALIUHEZIMALIU,ZHUMALIUYONGLAICUNCHU,ZIMALIUYIBANYONGLAIYULAN,SUOYILUXIANGHUIFANGSHIDAJIAKANDAODESHIPINZHILIANGYAOGAOYUYULANSHIKANDAODE。ZAIBUTONGFENBIANLV/ZHENLVYIJIHUAMIANXIAOGUOSHIMALVDAXIAOYOUSUOCHAYI。

YOUYUBIANMAYASUOSUANFADEBUTONG,H.264HEH.265MALIUBUTONG。MUQIANZHULIUBIANMAWEIH.265,XIANGBIH.264KEJIESHENGJIANGJINYIBANDECHUANSHUDAIKUANHECUNCHUZHANYONGLIANG。

YI、YINGPANRONGLIANG

YINGPANRONGLIANG,JIYINGPANDECUNCHUKONGJIANDAXIAO,YIBANYOU1T/2T/3T/4T/6T,1T=1024G,1G=1024M。XUYAOZHUYIDESHI,YINGPANSHIJIKEYONGYUCUNCHUSHIPINDERONGLIANGWEIZONGRONGLIANGDE90%,JIRONGLIANGXISHUWEI0.9,WEISHENMENI?

YINWEI:YINGPANCHANGJIADEBIAOZHUNSHISHIJINZHI,YINCI 1G=1000MB=1000000K,ERXITONGDECAIYONGDESHIERJINZHI,SUOYI1G=1024MB=1048576KB。

ER、JISUANFANGFA:

录像存储大小=主码流(M)÷8×3600(秒)×24(小时)×监控通道数×录像天数

JIASHEMOUXIANGMUDEGAOQINGTOUSHIH.265GESHI1080P(ZHUMALIUYUE3M),50LU,CUNCHU90TIAN,NEIMEJISUANGONGSHIRUXIA:

3M(ZHUMALIU)÷8×3600(MIAO)×24(XIAOSHI)×50(JIANKONGTONGDAO)×90(LUXIANGTIAN)≈145800000MB

HUANSUANWEITZEWEI:145800000MB÷1024÷1024≈139T,ANYINGPANSHIJIRONGLIANG90%ZEWEI:139T÷0.9=154.4T,JININXUYAOZONGGONG154TDEYINGPANCAIKEYIMANZUCUNCHUXUQIU,NEIMEQUGEZHENGJIUAN160TZHUNBEIBA。

备注下:

ZHUMALIU÷8,WOMENSUOSHUODEJIANKONGMALIUSHIYIBITE(bit)WEIDANWEI。

DANGRAN,XIANZAIJISUANYOUGEZHONGJISUANQI,DOUKEYIZHIJIEJISUAN,BUGUOPINGSHIZAIXIANGMUZHONG,KEYIKUAISUDEYUGUXIAGENGHAO。

960P实际是指分辨率1280×960, 相当于130万像素:

H.265CUNCHUYITIAN22GZUOYOU(YIXIAOSHI1G)。

1080p实际是指分辨率1920×1080像素,相当200万像素 :

H.265CUNCHUYITIAN32GZUOYOU(YIXIAOSHI1.3G)。

3mp实际是指分辨率2048*1536像素,相当于300万像素:

H.265CUNCHUYITIAN45GZUOYOU(YIXIAOSHI1.9G)。

4mp、5mp、8mpDUIYINGDEJIUSHI400WAN、500WAN、800WANXIANGSU,ZHEILIJIUBUSHUO,DAJIAKEYIZIJIKANSHANGBIAO。


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