[文章作者:张宴 本文版本:v1.0 最后修改:2009.04.13 转载请注明原文链接:http://blog.zyan.cc/post/409/]

  上周五,我们基于开源Flash Server:Red5(http://osflash.org/red5)的Flash流媒体服务平台上线,内容涉及视频上传、视频分发、调用接口、Flash播放器等。

  一、Flash RTMP流媒体播放演示(播放时进度条可以自由拖动):

  

  生产环境更多 Flash RTMP 流媒体视频演示:http://jx3.xoyo.com/xgxz/video/



  二、安装步骤简要说明:
  ①、安装JDK
  打开http://java.sun.com/javase/downloads/,下载最新的Java SE Development Kit (JDK),安装在/usr/local/jdk/下。
chmod +x jdk-6u13-linux-i586.bin
./jdk-6u13-linux-i586.bin


  ②、安装Red5
  打开http://osflash.org/red5/070final,下载red5-0.7.0.tar.gz,解压缩后执行./red5.sh,然后访问http://yourdomain:5080/,有演示。



  三、服务器带宽消耗比较:
  ①、客户端 1.5M ADSL 环境,HTTP 方式播放单个视频,服务器所消耗的带宽:
[root@localhost ~]# ./net.sh eth0 1
IN: 3318 Byte/s OUT: 259984 Byte/s
IN: 3486 Byte/s OUT: 249470 Byte/s
IN: 3332 Byte/s OUT: 259984 Byte/s
IN: 3090 Byte/s OUT: 252528 Byte/s
IN: 3000 Byte/s OUT: 252474 Byte/s
IN: 3000 Byte/s OUT: 253976 Byte/s
IN: 2940 Byte/s OUT: 255478 Byte/s
IN: 3004 Byte/s OUT: 252474 Byte/s
IN: 3452 Byte/s OUT: 252528 Byte/s
IN: 3270 Byte/s OUT: 260038 Byte/s
IN: 3586 Byte/s OUT: 252474 Byte/s


  ②、客户端 1.5M ADSL 环境,RTMP 流媒体方式播放单个视频,服务器所消耗的带宽:
[root@localhost ~]# ./net.sh eth0 1
IN: 3900 Byte/s OUT: 27878 Byte/s
IN: 4200 Byte/s OUT: 30868 Byte/s
IN: 4380 Byte/s OUT: 27801 Byte/s
IN: 4080 Byte/s OUT: 29965 Byte/s
IN: 4080 Byte/s OUT: 26450 Byte/s
IN: 3960 Byte/s OUT: 27143 Byte/s
IN: 3000 Byte/s OUT: 10061 Byte/s
IN: 3960 Byte/s OUT: 16166 Byte/s
IN: 3660 Byte/s OUT: 26480 Byte/s
IN: 4020 Byte/s OUT: 23127 Byte/s


  HTTP 方式播放,如果服务器端不限速,客户端的带宽越大,服务器消耗的带宽也越大,但限速又会影响用户体验;
  RTMP 流媒体方式播放,只要客户端达到最低带宽要求,不管客户端的带宽如何,服务器消耗的带宽都一样。

  如果播放10M以内大小的视频,HTTP 能够在较短的时间内下载完视频,能够降低并发观看用户数;
  如果播放10M以上大小的视频,RTMP 要比 HTTP 方式节省不少带宽。

  RTMP 播放时进度条可以自由拖动,虽然Lighttpd和Nginx目前也可以使用somevideo.flv?start=xxx的方式从指定位置下载视频,但还是不如 RTMP 灵活。



  四、带宽测试Shell脚本(net.sh):
#!/bin/bash

# test network width

function usage

{

        echo "Usage: $0  "

        echo "    e.g. $0 eth0 2"

        exit 65

}


if [ $# -lt 2 ];then
usage
fi
typeset in in_old dif_in
typeset out out_old dif_out
typeset timer
typeset eth

eth=$1
timer=$2

in_old=$(cat /proc/net/dev | grep $eth | sed -e "s/\(.*\)\:\(.*\)/\2/g" | awk ' { print $1 }' )
out_old=$(cat /proc/net/dev | grep $eth | sed -e "s/\(.*\)\:\(.*\)/\2/g" | awk ' { print $9 }' )

while true
do
sleep ${timer}
in=$(cat /proc/net/dev | grep $eth | sed -e "s/\(.*\)\:\(.*\)/\2/g" | awk ' { print $1 }' )
out=$(cat /proc/net/dev | grep $eth | sed -e "s/\(.*\)\:\(.*\)/\2/g" | awk ' { print $9 }' )
dif_in=$(((in-in_old)/timer))
dif_out=$(((out-out_old)/timer))
echo "IN: ${dif_in} Byte/s OUT: ${dif_out} Byte/s"
in_old=${in}
out_old=${out}
done
exit 0


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技术大类 » 其他Unix技术 | 评论(79) | 引用(3) | 阅读(133759)
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这个是什么原因呢?
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2012-8-17 17:34
等播放完,再点击重放,就不起作用了。。。。。。 red5 bugcry
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上面的视频播放例子是http。。
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