epiphan DVI2USB Solo, User Manual

Page: 127 / 166

16. Web Broadcasting Changing web broadcasting compression and performance
User Guide Page 127
Troubleshooting web broadcasting performance
Here are three typical reasons for adjusting web broadcasting
compression:
• If you have a slow Internet connection or if receivers of the
web broadcasts notice delays you can increase lossless or lossy
compression to reduce Internet bandwidth usage.
• If receivers of the web broadcast notice poor image quality
you can reduce the amount of lossy compression.
• If the video capture workstation CPU usage is too high during
web broadcasts or if receivers of the web broadcasts notice
delays and you have determined that the delays are not
caused by low Internet bandwidth. The delays could be
caused by high CPU usage on the video capture workstation
resulting in the video capture workstation not being able to
process all image data. Lossless compression increases CPU
usage, so you can reduce CPU usage during web broadcasting
by reducing lossless compression.
Note: You cannot change web broadcasting compression during a
web broadcast. You must stop the broadcast, adjust the settings
and then start the broadcast again.
Changes made to default web broadcast compression settings are
only visible to viewers of the web broadcast. Changing these
settings does not change how the video capture application
displays, records, or prints captured images.
Some examples
Here are some examples of adjusting lossless and lossy
compression for different Internet bandwidth and video capture
workstation conditions.
• If the video capture workstation has a quad-core 3GHz CPU
but connects to the Internet with a dial-up modem, you could
move the lossless slider closer to Compression to increase the
lossless compression to reduce Internet bandwidth usage.