X4

382 MPEG-4 encoder settings
http://pro.magix.com
 In "Variable bit rate" mode: The values entered here are applied to the video
as an average as a guideline. The size of the video to be exported can only be
approximated.
HSS rate
This is the maximum bit rate that should be present in the video stream, i.e.
maximum number of bits that may be transferred to the decoder.
Note: This option is only available in "Variable bit rate" mode.
CPB size
This sets the size of the "coded picture buffer“ in bits. This is the buffer where
the encoding is carried out. The larger the buffer is, the better the results will
be, but the processing will also take much longer.
Aspect ratio
In the film industry, this is an indication of the ratio between width and height of
a rectangle, monitor, or screen.
There are 3 different sizes available:
 Picture Aspect Ratio (also Display Aspect Ratio, DAR): This indicates the
desired aspect ratio of the video to be exported. Here are some examples of
typical aspect ratios: at home 4:3, 16:9 (typical for TV sets) or 16:10
(widescreen-flatscreens, widescreen notebooks), 3:2 for 35mm films and
photos. In cinemas you mostly find 1.85:1.
 Pixel Aspect Ratio (PAR, pixel aspect ratio: Indicates the aspect ratio of
individual pixels. The majority of computer monitors have quadratic pixels
(PAR=1:1), for analog television monitors (PAL at 4:3) 128:117.
 Sample Aspect Ratio (SAR, also Storage Aspect Ratio): Aspect ratio of the
saved resolution (number of pixels), e.g. 720:576 at PAL. It also calculates
picture aspect ratio and pixel aspect ratio: SAR = DAR / PAR.
Note: In the standard case, the "Aspect ratio" remains set the way it is. You
should only change the settings if the resulting video is exported distorted or
stretched or if you need to correct the video because it is in the wrong aspect
ratio.