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VGADVI Recorder Pro User Guide
Configure encoding
c. Select an option from the sizes shown, the dimensions will appear in the frame size field.
Scaling occurs automatically (no extra configuration needed) when you make the
dimensions larger, smaller, or a different aspect ratio than the source.
If your channel has a layout with only one source and your source and stream aspect ratios
differ, when viewing that layout, your source is centered in the frame and matte bars are
added to the top and bottom or left and right sides to make up the difference. See
Remove black bars (matte) from the video
.
6. If all your changes are complete, scroll to the bottom of the page and click
Apply
.
If you plan to use layout switching during a live stream, it's best to choose a fixed layout size. This
avoids causing the stream restart due to frame size change when you switch between single-
source layouts that use frame sizes.
Fine tune stream settings
Along with video/audio codecs and frame size, there are other configurable stream settings that affect quality
and bandwidth. Like with frame size selection, values for these settings can be a tradeoff between bandwidth
available and quality for stream viewers.
A table at the end of this section provides additional guidance for the settings
To fine tune your stream's settings :
1. Login to the Admin panel as
admin
.
2. Click
Encoding
for your channel; the encoding configuration page opens.
3. Scroll to the
Key frame interval
setting.
4. Click the
Key frame interval
drop-down box to choose how often a key frame (a frame that contains
all the pixels) is sent when streaming the video. The longer the key frame interval the smaller the video
file size, and vice versa.
5. If desired, change the
Limit frame rate
. The default should be adequate in most applications. While
decreasing the limit may improve system performance, you may need to test different values to
balance video smoothness and processing power.
6. If using H.264 of MPEG4 video codecs, you can increase or decrease image quality by increasing or
decreasing the target
Bitrate
value. Video with a high level of motion and high resolution, such as a
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