Epiphan Networked VGA Grid - Manual (Page 120)

Networked VGA Grid User Guide 3-3 Fine-tune channel configuration
3-3
Fine-tune channel configuration
In addition to adjusting typical features such as frame rate, resolution and bit rate to reduce bandwidth and
system resource usage, choose the following settings to maximize your stream quality, while minimizing your
processing requirements and bandwidth:
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Choose a codec to maximize your stream quality
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Codec and file format compatibility
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Adjust video quality
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Upscale or downscale your video image
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Control the matte (black bars) in the video output
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Unstretch the output video
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Limit the frame rate
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Adjust key frame interval
Choose a codec to maximize your stream quality
Before you begin recording and streaming content from a channel, you must select the codec that will be used
to compress the channel’s video and audio content. Deciding on which codec to use depends on how you
prioritize the following criteria:
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Compatibility with streaming formats and file playback options
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Size of the compressed file
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Compression speed
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Image quality
For example, if you require a high quality image, the trade-off might be a larger file size, or slower compression
speed. If you require live streaming and therefore cannot tolerate slow compression, the trade-off might be a
lower resolution.
The table Select a video codec, below, highlights the advantages and disadvantages of supported codecs.
Once you select video and audio codecs a list of available video format and standards specific to the selected
codec is generated and displayed. You can provide the URLs and files to participants to view the broadcast, see
Stream your video .
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