Media Reader
The Media Reader module allows you to process an image
sequence without having a live camera feed. The module play
accept AVI, WMV, WMA, MPG files and ASF streams. This is useful for processing the same
image sequence over and over in order to test out new modules or experiment with other modules
over the same sequence of images.
Note that with the addition of the ASF stream you can also hook into image streams broadcasts
over the Internet in ASF format. This is similar to the Http Read component
but can accept a different streaming format.
Interface
Instructions
1. Filename/Url - Specify the file or url to read in the "Filename/URL" textbox. The media reader can accommodate .wmv, .mpg, and .asf files.
2. Loop Playback - If you want to loop the playback (only valid for files) then check the "Loop Playback" checkbox.
3. Playback Speed - To change the playback rate of the video select the appropriate playback speed. Numbers lower than
1 reduce the speed while numbers greater than one increase it.
4. Skip - To Skip the first or last part of the video configure the "Skip First" and "Skip Last" accordingly. When
the video loops the first X seconds, milliseconds, etc. will be jumped over. Similarly the video will
end X seconds before the actual end of the video. Note that this is not cropping or modifying the
video in any way. There are read only parameters.
5. Timeout - For those reading ASF files over the Internet you may need to increase the frame timeout
to a larger number. This will tell the Media Reader module to wait longer until a frame arrives over the
network.
6. Start - You MUST press the "Start" button to begin playing. Once pressed you can also manually stop
the playback by pressing "Stop" (the "Start" button will change to "Stop" once playing starts).
Note that you must press start for the playback to start streaming. Simply pressing OK
will NOT begin playback. Also be aware that for Internet based streams you need to wait
about 20-30 seconds after pressing the start button for playback to actually start.
Example
Try adding the following url into the Media Reader and press "Start"
http://204.14.65.135/img/video.asf
The url points to a stream that uses a Cisco-LinkSys WVC54GC Internet camera to broadcast views
from the office of InfoWave Technologies, Inc.
in the Ammon Center at the Manchester-Boston Regional Airport.
Note that if RoboRealm appears to freeze the connection may be down. Wait for about 20 seconds and you will regain control
after the network connection times out.
See Also
Read AVI
HTTP Read
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