Project 1

Online multi-user video monitoring system

System goal: A user can monitor the views of different sites simultaneously.

Multiple users can access to the views simultaneously.

Example: Different classrooms, each has a camera, administrator wants to monitor the classroom by looking through the different camera views.

Many persons can be the administrator, such as the security staff, the head of the school, the parent of the students, so on and so forth.

System functionality requirementData collectionData managementUser interface design

Data collection IVideo stream data have to be collected

from different sites using cameras◦Stream data can be collect from the camera

located in different sites (e.g. classroom)◦You can generate the video stream data

using VLC http://www.videolan.org/vlc/◦VLC is a free and open source cross-

platform multimedia player and framework that plays most multimedia files as well as DVD, Audio CD, VCD, and various streaming protocols.

Data collection IIData will be continuously

transported to a remote datacenter for processing via internet◦The system will receive the streaming

data and store it in a local file◦The local file will continuously be

transported to the HDFS in the cloud◦The key point of this project is the use of

cloud technique, specifically the Hadoop◦Sample code from

http://bbs.chinacloud.cn

Data collection IIISupport dynamic camera adding

and deleting◦Do not need to reboot system when

add or delet a cameraCameras in the system support

two modes: ON and OFF.

Data collection IVData collection supports two

modes: ON and OFF.◦When camera is OFF, data collection

is OFF◦When camera is ON, data collection

is ON or OFF, set by system administrator

◦When the data collection is ON, the live streaming data will be transported to the cloud

Data management IStreaming data are stored in cloud,

use the front-end server as a cache.◦Cameras are connected to a front-end

server◦Video data are first stored in a file in

the front-end server◦The file is transported into the HDFS for

user access and data archive◦The uploaded files will be deleted

locally from the front-end server

Data management IIData storage modes:

◦STORE mode: data can be stored in the HDFS of cloud

◦ CACHE mode: data just be cached for a while (e.g. 1min) before being deleted permanently.

◦This “cache” is similar to the cache on the front-end server

◦Front-end server is just for collecting data, not for user access

◦Users access to videos by login to the cloud

Data management IIIData are archived daily for replay

:◦Data will be compressed and stored

in the HDFS in terms of day and place in STORE mode

◦Nothing to do in CACHE mode

Data management IVSupport video search

◦System builds a search engine for stored videos in terms of date and place

◦The search result can be depressed and replayed

◦More play features can be considered

Data management VLimited number of archived

videos◦The storage of cloud is limited due to

the pay-as-you-go payment method◦Number of archived data for each

camera can be specified by system administrator

User interface design IAccess to the system

◦support standard user register and login, s.t. username, password

◦Users are granted to access to specified cameras’ videos, admin can update the user’s camera list.

User interface design IISwitch between different

cameras◦Users can switch to different

authorized camera◦Users access to only one camera at

the same time to improve the system performance, which means only one video file will be opened and displayed for one user in a certain moment.

User interface design IIIReplay archived videos

◦Users can replay the video returned by the search engine.

Allow for different video resolution in terms of network bandwidth◦Use the available video player (VLC)◦Do not need to implement it by yourself

It’s up to you to add more features.

System performance requirementFor each camera, support online users (live connections) 2 to 30.

System can support 2 to 20 cameras.

Tips to the implementation

Search http://bbs.chinacloud.cn for codes of video collecting and storing in HDFS.

You can debug code under the hadoop on single server mode.

Find more in Hadoop project: http://hadoop.apache.org/

Collaboration A group projectUp to 2 students in one group Each group sends one copy of the

group member list to TA by Thursday (March 21st )

Email title format: 2013DB2-GM: name1, name2

Email content includes member name, email and cell phone

Project submissionDue time: April 7th, 23:59:59Materials to submit

◦Source code ◦Presentation slides

Presentation content◦Demonstration of the system with multiple

cameras (2 at least) if possible◦show the system use case diagram, design,

api, part of codes◦Presentation time will be scheduled in week

7, 15 minutes per group, plus 5 minutes Q&A