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• Main profile: This profile was originally intended for the broadcast industry and
for backup purposes. It has become less popular since the development of the
"High Profile" for this purpose.
• High profile: This profile is used for broadcast and backup applications, and it is
also used sometimes in the HDTV industry (High Definition Television). This
profile is used for HD-DVD and Blu-ray Discs, for example.
Level
H.264 defines different levels. The level determines which bit rate and resolution are
possible for the video.
With the "Auto level" option, the encoder determines the level automatically on the
basis of the resolution of "AVC preset" video formats, the set bit rate and the profile.
Frame type
"Picture type" specifies which parts of a frame should be used as the basis for the
encoding:
• Progressive Frame: A single image from a video sequence, also called a fullscreen.
• Interlaced Field: This is half an image. Two of these are combined to produce a
frame. Read more about this explanation regarding "Interlace (view page 359)".
• Interlace Frame: Th
e encoder creates a „Frame field“ which is the basis for the
encoding.
Field order
Note: This parameter is only available if the setting "Field" is selected for "Frame
type".
In case of interlaced streams, the half-image sequence is set. Read more about this
explanation regarding "Interlace (view page 359)".
Slice count
A frame can be divided into multiple slices for encoding. Specify the maximum
number of slices are permitted. If set to "0", then the number will be determined
automatically.
Rate control
The bit rate indicates how much data per second is saved in the video (playback
speed). This makes the bit rate the deciding parameter with regard to the file size and
quality of the video to be encoded. A higher bit rate means more quality but also a
larger file size.