Page 329 - Manual_Movie Edit Pro 2021_EN_Neat

MPEG-2 encoder settings (Standard) 329

Average bit rate (kbps): The bit rate entered here is used as the average rate applied
to the video. The size of the video to be exported can only be approximated.

Maximum bit rate (kbps): This is the maximum bit rate for the video stream, i.e. the
maximum number of bits the decoder is allowed to transfer per second. This
parameter only takes effect in the "Variable" bit rate mode.

CPB (Coded Picture Buffer): The entered value specifies the maximum amount of
storage space for an encoded frame. Higher values can improve quality, but might
also cause problems during export. If export is aborted, lower this value. The setting
"0" means that the encoder has determined the disk space.

Maximum GOP length: The maximum GOP (view page 348) length is determined
here. High values mean improved compression. Lower values create stronger security
protection and enable improved access to individual frames for processing the video.

Tip: A good rule of thumb is to enter the frame rate as the GOP length.

GOP structure: The GOP structure is the sequence of the various frames. At the
beginning of a GOP there is an I-Frame, at the end there are several B-Frames,
followed by a P-Frame (view page 350). The sequence of B-Frames und P-Frames
repeats until the end of the GOP.

Example: A GOP with a length of 20 and the "IBBP" structure will look like this:

No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Frame I B B P B B P B B P B B P B B P B B P B

Profile: Profiles define the encoder properties that are supported.
• SIMPLE: Intended to be used as the basic profile for applications with limited
computational power, e.g. video conferences or mobile phone videos. This
profile does not allow B-Frames, which first and foremost means more data
traffic, but contributes to better reliability.
• Main: 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: This profile is used for broadcast and backup applications and is also
sometimes used in the HDTV industry (High Definition Television). This profile
is used for Blu-ray discs.

Note: You should only change this setting when there are problems playing back the
generated video.