Datavideo 4K ShowCast STUDIO, Instruction Manual

Page: 63 / 98

63

60.00

50.00

30.00

29.97

25.00

20.00

15.00
Frame rate greatly impacts the style and viewing experience of a video. Different frame rates yield
different viewing experiences, and choosing a frame rate often means choosing between things such
as how realistic you want your video to look, or whether or not you plan to use techniques such as
slow motion or motion blur effects.
Below is a list of common options for different applications:

24fps – This is the standard for movies and TV shows, and it was determined to be the
minimum speed needed to capture video while still maintaining realistic motion.

30fps – Videos with a lot of motion, such as sports, will often benefit from the extra frames per
second.

60+fps – Anything higher than 30fps is mainly used to create slow motion video or to record
video game footage.
Profile
Profile sets the H.264 encoding profile for your recorder. The available options are Baseline, Main,
and High. Typically, High profile provides the best image quality and is suitable in most instances.
However, depending on the decoder used when viewing the recording, a Main or Baseline profile may
be required.

High

Main

Baseline
Entropy
There are two coding options available for generating H.264 content:

CAVLC (Context-Adaptive Variable Length Coding)

CABAC (Context-based Adaptive Binary Arithmetic Coding)
CABAC encoding provides a 7-10% quality improvement over CAVLC but requires an extra 10-15%
CPU. CABAC encoding is only available in H.264 Profiles Main & High. When targeting at low-powered
devices, such as older cell phones and tablets, we recommend the Baseline Profile that uses
CAVLC which requires less computing power.
GOP
GOP pattern with longer GOP length encodes video very efficiently. Shorter GOP lengths usually work
better with video that has quick movements, but they do not compress the data rate as much.
Depending on your applications, you can select 16 GOP sizes ranging from 1 to 255.