home *** CD-ROM | disk | FTP | other *** search
- FAQ.TXT 2-13-96
-
- CU-SeeMe for Windows Frequently Asked Questions:
-
- * What Video Capture card/Sound card/Winsock Stack will work with CU-SeeMe?
- * QuickCam doesn't work with Win'95.
- * "GetHostByName() failed (nnnnn)" error. Hostname Requirement for CU-SeeMe.
- * "No Response from <ip address>" error.
- * Capture card is not detected by CU-SeeMe
- * "WSAAsyncSelect blew chow (11004)" error.
- * LAN WorkPlace - CU-SeeMe can't connect.
- * Audio does not work, even though I've got an audio card and speakers
- * I can't see my local video window anywhere.
-
- If you don't find the answer to your question here or in readme.txt or
- cuseeme.txt, you can join the mail list cu-seeme-L. See readme.txt for
- info. Rich Kennerly <rbk1@cornell.edu>
- ---------------------------------------------------------------------------
- What Video Capture card/Sound card/Winsock Stack will work with CU-SeeMe?
-
- See COMPAT.TXT
-
- The latest copy of COMPAT.TXT is available via FTP at
- cu-seeme.cornell.edu/pub/CU-SeeMe and on the web at:
- http://cu-seeme.cornell.edu/PC.CU-SeeMeCurrent.html
-
- ---------------------------------------------------------------------------
- QuickCam doesn't work with Win'95
-
- Here are the steps to take to install a QuickCam with Window '95
-
- 1) Run the QuickCam installer.
-
- 2) Make sure the capture driver, called QUICKCAM.DRV, is in the
- /WINDOWS/SYSTEM directory.
-
- 3) Check the file SYSTEM.INI (in the /WINDOWS directory) and make sure
- there's an entry in the [drivers] section for msvideo like this:
-
- msvideo=quickcam.drv
-
- If you've had another capture driver installed you might see another
- driver listed as msvideo and another entry, msvideo1=quickcam.drv. In
- this case you should switch the quickcam to be msvideo and the other
- driver to be msvideo1.
-
- 4) Use the Win'95 Control Panel for Multimedia. On the 'Advanced' section,
- double click on the Video Capture Devices icon. You should see an
- entry for QuickCam. Double click on the icon for QuickCam. Make sure
- the "Use the video capture device" choice is selected.
-
- 5) Restart Win'95.
-
- ---------------------------------------------------------------------------
- "GetHostByName() failed (nnnnn)" error.
- Hostname Requirement for Windows CU-SeeMe
-
- Your Windows machine will need a hostname. CU-SeeMe for Windows
- will not work without it (this requirement may disappear soon).
- The way to provide a hostname is to make an entry into the hosts file
- called "hosts" (with no extension):
- The format for the hosts file is:
-
-
- <your IP address> <name for your PC>
-
- For example, you might decide to use the hostname WillieBob. If
- your IP address was 128.32.64.88, the entry in your hosts file would
- look like:
-
- 128.32.64.88 WillieBob
-
- Your HOSTS file should be in your Windows Sockets directory (the
- same directory that contains your 'winsock.dll'). This directory must
- be in the PATH before windows is started. Note: the HOSTS file needs
- to be accessed by the Winsock stack, not CU-SeeMe - putting the HOSTS
- file in the directory with CU-SeeMe will not accomplish anything.
-
- If you don't already have a hostname for your PC, you may want to
- contact your network administrator about getting one assigned. If your
- host name is defined in a Domain Name Server (DNS) accessible to your
- PC, you won't need to have a HOSTS file. Keep in mind, in this case,
- that if you can't reach your DNS, you'll get the "GetHostByName() Error"
- message.
-
- While this issue has been a problem for many it has worked on all
- stacks after some work (The FTP software hitch mentioned below took
- many phone calls to a very patient user at NSF before solving).
-
- Things to verify:
-
- *) Verify that you've only got one HOSTS file (there might be a bad one
- earlier in your path). Use FILE MANAGER, File Menu, Search - Search
- for hosts, start from c:\, check the 'Search All Subdirectories box.
- If you find entries other than the one you expect to find in your
- Winsock directory, consider removing or updating them.
-
- Possible stumbling blocks:
-
- *) You're using FTP PCTCP and you've something set in the "Domain
- Completion" box. This can cause your software to not find its real
- hostname in the hosts file.
-
- *) When Defining your hostname with your Winsock Customization software,
- do not include the domain name in the hostname specification. For
- example, if WillieBob is in the domain cit.cornell.edu, do NOT specify
- WillieBob.cit.cornell.edu as the hostname. Just enter WillieBob and
- enter the domain in its place.
-
-
- ---------------------------------------------------------------------------
- "No Response from <ip address>" error.
-
- Assuming that you have tested other winsock network applications so you
- know you have basic network connectivity, there are several possible reasons
- why you might be getting this response:
-
- * The reflector machine is down - Try to telnet, FTP, or PING the host
- address to check this. Even if you can't log in, any 'login' -type response
- will indicate that the host is on the net.
-
- * The reflector software is not currently running on the reflector host. Try
- a couple of reflector sites - it is not likely that too many will be down at
- the same time.
-
- * You have a 'firewall' somewhere at 'your end' - between your local network
- and the Internet. A firewall prevents traffic of certain types from
- passing in and out of a network or networks. For example, a 'firewall'
- may exist to reduce traffic volume by disallowing UDP packets - this will
- prevent PING and NFS (Network File System) packets from passing through.
- And, since CU-SeeMe uses UDP, it will not work either. It is also possible
- for a firewall to disallow certain UDP port and allow others. Your network
- provider can decide what type(s) of 'firewall' restrictions if any to
- impose on your network.
-
- It can be difficult to determine whether or not there is a firewall in
- place on your network. If you can telnet to a reflector host (even though
- you can't log on) but CU-SeeMe doesn't work then it could be a firewall.
- You can contact your network provider to see if there are any restrictions
- on the traffic passing in and out of your network. CU-SeeMe uses UDP
- (not TCP) on UDP port 7648. You can ask your network provider to allow
- UDP traffic on port 7648 to get through the 'firewall'.
-
- Or, if you're using a PC with Winsock, it could be:
-
- * There is a DNS IP address problem or 'proxy' DNS is being done. Somehow,
- with Winsock, it is possible for the machine to make a DNS query to the
- network for its own address which is not really the actual address of the
- Windows PC. CU-SeeMe uses this address in the CU-SeeMe packet header which
- is different from the address in the IP header (apparently). This can be
- caused by having two DNS servers with different IP addresses or, by a
- machine doing 'proxy' DNS where it claims to be 'you' so it will get
- your packets which it will then forward to you. This latter example has
- been found in a situation where SLIP IP addresses were being 'spoken for'
- by the slip server. Unfortunately, we don't have good information about
- what can be done to really solve this problem. I would recommend having
- your host and actual IP address in a HOSTS file locally so the DNS call
- is either not made or not favored over the local hosts entry.
-
- * You're using TIA. Here's a quote from a knowledgable user:
-
- "TIA will not work with CU-See me because CU-SeeMe needs an IP address of the
- machine you are connecting with. TIA does not give your machine an IP address
- but gives you the IP address of the machine you are connecting to, so instead
- of trying to connect back to your machine CU-SeeMe is connecting back to your
- providers machine (the machine that you are running tia on). In order for
- CU-SeeMe to work you need a PPP or SLIP account where you have your own
- individual IP address."
-
-
- ---------------------------------------------------------------------------
- Capture Card is not detected by CU-SeeMe
-
- Sometimes a video capture card (especially Creative Labs Video Blasters)
- can be installed in the system
- and the Video Capture program supplied by Creative Labs works fine. But,
- CU-SeeMe does not generate a local video picture and the 'File-Video Devices'
- option is greyed out.
-
- Edit your system.ini file in the /windows directory and, in the [drivers]
- section, make sure there's an entry for msvideo=. For example, one user with
- a blaster FS200 has the entry:
-
- msvideo=fs200cap.drv
-
- in system.ini. Check your installation guide to see what it should be for
- your model. This entry is needed for software to locate the driver; apparently
- the Creative labs software itself does not require this.
-
- For Windows '95 you should also check:
-
- * Use the Win'95 Control Panel for Multimedia. On the 'Advanced' section,
- double click on the Video Capture Devices icon. You should see an
- entry for QuickCam. Double click on the icon for QuickCam. Make sure
- the "Use the video capture device" choice is selected.
-
- ---------------------------------------------------------------------------
- WSAAsyncSelect blew chow (11004)!
-
- Some Winsock stacks, especially Lan WorkPlace for Dos, often report
- this error. The error 11004 means that your winsock stack either does
- not support UDP or is not set up to do so. Check the configuration
- options for your network installation to make sure UDP is enabled if
- possible. If you're using LAN WP see the other FAQ answer for LAN WP.
-
- ---------------------------------------------------------------------------
- * LAN WorkPlace - CU-SeeMe can't connect.
-
- We received a report about an IMPORTANT configuration detail
- required for CU-SeeMe. In the NET.CFG file you can specify the number
- of sockets for TCP and UDP. You must change this number to 30 or less
- in order for CU-SeeMe to work:
-
- tcp_sockets 30
- udp_sockets 30
- raw_sockets 1
-
- ---------------------------------------------------------------------------
- * Audio does not work, even though I've got an audio card and speakers
-
- Audio will only work if you've got enough bandwidth to support it. At
- this point, you need to have at least a 28.8K modem, ISDN at 64K or 128K,
- or a faster network connection to the Internet. If you have a 28.8K modem
- you STILL will only receive audio if the sender has set their audio encoding
- method to DeltaMod 16K. Unfortunately, at this point, there's no way to
- tell what method they're using - you just won't hear them (or perhaps you'll
- hear pops and tiny segments of sound).
-
- IMPORTANT NOTE: If your computer is audio capable but you DON'T have
- a camera you can only choose the audio encoding method by editting
- CUSEEME.INI. The two choices for audio encoding method are:
-
- [Audio Settings]
- Encoding Method=Delta-Mod (16 Kb/s)
- --or--
- Encoding Method=Intel DVI (32 Kb/s)
-
- If you are using a MODEM at 28.8 or less you MUST use Delta-Mod
- encoding!!!!
-
- ---------------------------------------------------------------------------
- * I can't see my local video window anywhere.
-
- Especially for Win'95 users, sometimes the local window does not appear
- anywhere on the screen even though the camera still works and you're sending
- video. The File / Video Format... dialog still works.
-
- For some reason, the local video window is off-screen. You might find
- it under the task bar in the lower right corner. Or, you can edit the
- /windows/cuseeme.ini file and remove or edit the settings for
- [Video Position] for Window0=x,y.
-