OCT Online Video, Availability,
Format, and Requirements
Online Video, Further Information
Council Hearings and DCN Programs Availability
Overview of OCT Video Streaming
OCT Streaming Media Technical Specifications
File Types and Protocols
To view and listen to our programs
Web Browser Issues
Phone Modem, DSL and Cable Connections
Troubleshooting Video Playback Issues
Contact OCT Website Assistance
to Viewers of OCT Streaming and On-demand Video
and other DC Government agencies, use only Windows Media
Format to encode and deliver streaming video on the Internet.
The supported player is Windows Media Player. Other
players such as the freeware program VLC Player, from www.videolan.org,
can also play our streamed files.
OCT archived video-on-demand files are also in Windows
Media Format. OCT video-on-demand files can be viewed
with version 11 or earlier of Windows Media Player (WMP),
or with certain other media players, including VLC.
note that OCTO
hardware and software standards specify using Windows
Media Player version 10, not version 11, and they recommend
using Internet Explorer version 6, not the more recent version
7, until further notice, due to questions about program security.
Online Video, Further Information and Technical Specifications
Council Hearings and DCN Program Availability
Council hearings, mayoral announcements and press conferences,
as well as DCN original programming and many city events are
filmed and broadcast by OCT.
and DCN videos are available in a variety of convenient formats:
Broadcast in the District of Columbia via Comcast, RCN and
Streamed 24x7 over the internet available anywhere
in the world
Stored and accessible 24x7 as video-on-demand
for viewing at any time
Available on VHS and professional tape formats
for a fee
Available on DVD and CDs
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Streaming Media Technical Specifications
File Types and Protocols:
Media is broadcast from our encoders to a stream hosting service
due to the high bandwidth requirements. A hosting service
allows an unlimited number of viewers to receive our streaming
video, without a concomitant increase in the bandwidth at
our end of the pipe. So instead of paying for a very large
pipe to the internet, we use a small pipe and use the surge
capacity of the stream hosting service.
TV-13 and DCN streaming broadcasts are sent in Windows Media
Advanced Streaming Format (.asf) files.
demand video files are also in the Microsoft Advanced Streaming
Format (.asf). They are called forth by a link to an .ASX
file, for example 03_12_07_FINANCE.asx, where .asx designates
Microsoft Advanced Stream Redirector File using which uses
Microsoft MMS protocol to pull files from the OCT TV Video-on-Demand
OCT .asf files contain one stereo stream of audio and two
streams of video.
Our files are indexed, allowing you to go start playing at
any point in the file.
Windows Media Audio 9
20 kbps, 22 kHz, stereo (A/V) 1-pass CBR
Codec: 0x0161 (WMA v2)
0x01:22050Hz 20 kb/s tot (2 chnls)
File type: .ASF (Microsoft Advanced Streaming Format)
Two streams, one encoded at 40 K and one at 100 K.
Size: 320x240 pixels, 30 FPS
Aspect Ratio: 1.333 (4:3)
Windows Media Video (.WMV)
WMV2; WMP v8
and listen to our programs
You must have a Pentium class or better computer, sound card,
a 56 Kbps telephone modem, DSL, Cable Modem, T3 or T1 Connection
and the Windows Media Player. If you don't have it already,
you can download the Windows Media Player free from Microsoft
There are compatible versions available for computers running
either Windows or Mac operating systems.
Windows Media Player, versions 11 to 6.4, will play the video
streams on our server.
You can use Internet Explorer, Firefox, Netscape, Opera or
Safari to view our broadcast streaming and video-on-demand.
You must have a properly installed "plug-in" to
your web browser, which is the way Media Player installs by
Media player, or the player of your choice, will open automatically,
locate the video stream on our server, and play the file after
a short delay for buffering. You may have go to your program
options and associate your player with Microsoft .ASX files.
If your computer is running a Windows operating system and
you are using a recent version of Microsoft Internet Explorer
as your web browser you should have all the necessary software
pre-installed and configured to view our streaming video without
Modem, DSL and Cable Connections
TV-13 and DCN live video streams will work with both broadband
and dialup connections. Each stream contains two versions
of the same video and one version of audio. Our server will
connect your computer to the highest resolution video image
it will support. One stream is for viewers with DSL, Cable
Modem, T3 or T1 Connections; the other will support much slower
Dialup versions are optimized for access via 28.8Kbps and
56Kbps telephone modems.
For the best viewing experience, a broadband connection is
recommended, however, a dialup connection will deliver a good
enough picture for you to recognize the speaker during close-up
shots and the audio portion will be adequate.
The OCT TV Stream is a "smart" stream delivered
from a windows media server. It will automatically detect
the available bandwidth of the connection and deliver either
a high quality 143 Kbps stream or a lower quality 47 Kbps
stream according to the bandwidth detected between your computer
and our server.
Video Playback Issues
you have trouble viewing our streaming files, one of the links
on the right may help. You may also try another media player,
particularly for Macintosh or Linux computers. A free, open
source alternative media player that works for our streams
and our video-on-demand files is VLC. It is available at www.videolan.org.
You can have Media Player installed and use all of its features,
and install VLC at the same time. To view our video files
with VLC, you need to set file associations in Windows File
Explorer, Folder Options, File Types so that .asx files are
opened with VLC. Your IT person can help you if you are unsure
how to set this up, or telephone OCT Website Assistance at
202-671-0066 for further information.
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For further help, contact your IT person or contact ITServus
for help. OCT can help you with your concerns but cannot reconfigure
your computer or make house calls to help.