Epiphan VGA2USB Pro - Manual (Page 128)

16. Web Broadcasting Changing web broadcasting compression and performance
Page 128 Epiphan Frame Grabber
• If you have a high-bandwidth connection to the Internet but
the video capture workstation has an older or relatively slow
CPU (for example, a Pentium III CPU), you could move the
lossless slider closer to Speed to reduce the lossless
compression.
• If the video capture workstation has a relatively slow CPU and
your Internet connection is relatively slow you can move the
lossy slider closer to Compression to increase the lossy
compression.
• If increasing the lossy compression reduces image quality you
can move the lossy slider closer to Quality to reduce the lossy
compression and improve the quality of the image.
Improving performance by lowering the frame rate
You can also improve the performance of web broadcasting by
lowering the frame rate. Lowering the frame rate reduces the
amount of Internet bandwidth usage by reducing the number of
frames broadcast. Lowering the frame rate also reduces the
demand on the video capture workstation CPU resources
(because fewer frames means the video capture workstation uses
fewer CPU resources to capture and compress the frames).
To lower the frame rate, from the Tools menu select Options and
then select Display. Select Limit frame rate to and set the frame
rate to a lower value.