I cannot see video or hear audio in a presentation
From Avacast Support
I cannot see video or hear audio in a presentation.
If the video was playing previously, right-click on the video area (CTRL-click if using a Macintosh) and select "Play/Pause" from the menu. If the menu does not appear, check that you have the proper media player installed (you will usually get a message telling you so). If that doesn't work, try closing the Avacaster Player or Administrator window and click the entry link again, and log in again. It is possible there was a network problem that disrupted the stream (either on your network on at the site where the video is originating). Unfortunately, there isn't much you can do except wait for the situation to improve.
If the video never appears at all, there can be any number of reasons as discussed below (note that the focus is primarily on Windows Media, which is currently used most frequently in Avacaster presentations).
A. If you are an Avacaster Administrator: Be sure that your video stream is actually working. Try to play just the media by itself in the standalone media player application, outside of Avacaster (you can copy the URL from the Setup Panel in the Media sub-tab). If the media plays, be sure that you have selected the correct media link on the Administrator entry page, and also check the other possible causes explained below.
If it does not work, be sure that you have defined the correct media type in the Administrator (the type must match the format that your encoder software outputs). Also check that the encoder is running, that all necessary ports are open on your network, that your streaming server is set up correctly and is communicating properly with the encoder; the specifics vary significantly according to various factors, including the media type, your streaming provider (if any), etc. If you need assistance setting up these items, contact Avacast Support to discuss your consulting options.
B. If you get an error message that the media is not available, the stream may not be running, so check with the event coordinator if possible. Or there may be network problems somewhere along the line; if others are receiving video at other locations, this is almost certainly the case; if everyone is having problems, it could be a problem at the streaming source.
C. Sometimes streams take a very long time to start up, especially high-bandwidth streams (and especially Windows Media on a Macintosh computer). If the video area in the upper right is filled with black, wait at least 5 minutes for the video to appear. If it doesn't appear and you are on a Macintosh, keep the Avacaster window open and try launching the standalone Windows Media Player application.
D. Your computer may be behind a firewall that is blocking the stream. Streaming typically requires that certain ports be open for incoming and outgoing TCP and UDP traffic (although some choose to stream over HTTP on port 80). Check with your network administrator to verify that the necessary port is open in your firewall configuration. These are the ports typically used for UDP streaming of media types supported by Avacaster:
- Windows Media: 1755 or 7070
- Real Media: 554 or 7070
- QuickTime: 554 or 7070
E. You may need to adjust your Windows Media proxy settings. Close the Avacaster window and do the following:
1) Open the standalone Windows Media Player (look for an icon on your desktop on in your task bar) 2) Open the Tools menu, click Options, then select the Network tab. 3) Under "Streaming proxy settings," highlight "HTTP" in the list and click the "Configure" button. 4) In the new window that pops open, select "Autodetect proxy settings" and click "OK." 5) Highlight "MMS" in the "Streaming proxy settings" list and click the "Configure" button. 6) In the new window that pops open, again select the radio button labeled "Autodetect proxy setting" and click "OK." 7) Click the "Apply" button" and then "OK" to close the "Options" window. 8) Quit Windows Media Player and try opening the Player and logging in again.
If the media still doesn't work, close the Avacaster window again and do the following:
1) Open Windows Media Player. 2) Repeat the above steps, except instead of selecting the "Autodetect proxy settings" option, select the "Do not use a proxy server" option. 3) Click the "OK" button, then the "Apply" button. 4) Quit Windows Media Player, and try the event again.
F. If you do not have the latest version of Windows Media, try upgrading it if possible. You can download it from Microsoft's web site: http://www.microsoft.com/windowsmedia/
Or try this: 1) Open Windows Media Player. 2) Open the Tools menu, click Options, then select the Player tab. 3) Select "Every day" for "Check for Updates." 4) Click "OK" to save the change. (If you do not want to keep this setting permanently, just follow the procedure again a bit later and select the desired update setting.)
G. You may not have the codec used in this particular stream. Try enabling the "Download codecs automatically" feature of Windows Media Player. To check it in Windows Media 9:
1) Open Windows Media Player. 2) Open the Tools menu, click Options, then select the Player tab. 3) Make sure the checkbox "Download codecs automatically" is checked on the "Player" tab. In Windows Media Player 7.1, the check box is in the same location, but is labeled "Enable automatic codec download." Check the box if it is not already checked, click "Apply," then click "OK." 4) Try opening the Player window If you receive a pop-up box asking for permission to install a codec, click "Yes" to approve it.
Here are some Microsoft links that may be helpful:
- Using the IP multicasting utilities
- Troubleshooting Windows Firewall in Microsoft Windows XP Service Pack 2
- Additional Resources for Windows Firewall Troubleshooting
- A client may not be able to connect to multicast streams or to other User Datagram Protocol streams through Windows Firewall by using Windows Media Player