！本文中的命令都在终端下输入！
1.安装软件，命令:
sudo apt-get install ffmpeg
2.备份原始配置(防止配置文件修改错误，备份以防万一)，命令:
sudo mv /etc/ffserver.conf /etc/ffserver.conf_backup
3.编辑配置，把它改为下面的内容，命令:
sudo gedit /etc/ffserver.conf
配置文件:
Port 8090
# bind to all IPs aliased or not
BindAddress 0.0.0.0
# max number of simultaneous clients
MaxClients 100
# max bandwidth per-client (kb/s)
MaxBandwidth 16000
# Suppress that if you want to launch ffserver as a daemon.
#NoDaemon
<Feed feed1.ffm>
File /tmp/feed1.ffm
FileMaxSize 10M
</Feed>
# FLV output - good for streaming
<Stream test.flv>
# the source feed
Feed feed1.ffm
# the output stream format - FLV = FLash Video
Format flv
VideoCodec flv
# this must match the ffmpeg -r argument
VideoFrameRate 30
# generally leave this is a large number
VideoBufferSize 160000
# another quality tweak
VideoBitRate 500
# quality ranges - 1-31 (1 = best, 31 = worst)
VideoQMin 1
VideoQMax 5
VideoSize 352x288
# this sets how many seconds in past to start
PreRoll 0
# wecams don't have audio
Noaudio
</Stream>
# ASF output - for windows media player
<Stream test.asf>
# the source feed
Feed feed1.ffm
# the output stream format - ASF
Format asf
VideoCodec msmpeg4
# this must match the ffmpeg -r argument
VideoFrameRate 30
# generally leave this is a large number
VideoBufferSize 160000
# another quality tweak
VideoBitRate 500
# quality ranges - 1-31 (1 = best, 31 = worst)
VideoQMin 1
VideoQMax 5
VideoSize 352x288
# this sets how many seconds in past to start
PreRoll 0
# wecams don't have audio
Noaudio
</Stream>
ps.代码部分，大家也可以尝试修改，达到自己最满意的效果
4.保存修改完代码配置文件后，运行，命令:ffserver
5.再开一个终端操作，或者’ctrl+z’让ffserver在后台运行，命令:
ffmpeg -s 352x288 -f video4linux2 -i /dev/video0 http://localhost:8090/feed1.ffm
6.同一局域网内的另一台电脑上,用支持网络的播放器(Windows Media Player)打开：
mms://xx.xx.xx.xx:8090/test.asf
(xx.xx.xx.xx 为装有ubuntu的ip 或域名)
这时候，在播放器上，就可以实时看到ubuntu摄像头所拍摄的画面了。
我在本次实践中，体会到了无论是对配置文件的修改，还是对ffmpeg的了解，功夫都还大大不够，
本文旨在分享基础方法，也欢迎大家来指正本文诸多不足的地方
!问题注意！
有些朋友在操作时，发现自己电脑上不存在 /dev/video0 这个驱动文件
这里我推荐一个小办法，ubuntu自带了一个cheese(茄子大头贴)，使用一下这个软件，等屏幕上显示出拍摄画面时，/dev/video0就已经自动创建了