Epiphan VGADVI Recorder - Manual (Page 81)

VGADVI Recorder User Guide 3-2 Fine-tune channel configuration
Unstretch the output video
By default, the VGADVI Recorder makes sure that the aspect ratio of input signals is preserved when the
output is streamed. If this default was overridden or if the channel was created in a version of the software
earlier than 3.11.0, the image is stretched to match the output frame size. The effect may be subtle and may not
be problematic for you, but if you want to resolve this it is very simple to do.
To preserve the source aspect ratio:
1. Connect to the admin interface using your preferred connection mechanism. See Connect to the Admin
Interface .
2. Login as admin.
3. From the web interface, click Stream Setup; the stream setup page opens.
4. Select Keep aspect ratio.
5. Click Apply.
Unstretching the image causes a matte (black bars) to appear on the sides or top and bottom of
the output. To remove these see Control the matte (black bars) in the video output.
Limit the frame rate
Limiting the frame rate sets a frame rate value that is lower than the maximum frame rate at which the device
can encode images (the maximum is 30). Reducing the frame rate reduces the number of images captured by
the device and reduces bandwidth usage.
The device's ability to maintain a set frame rate is based on several factors, for example:
l
overall system load affects the ability for the device to process pixels;
l
available bandwidth;
l
the resolution value;
l
the type of motion that is captured; and
l
number of users accessing the stream.
72