X4

MPEG-4 encoder settings 381
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Pulldown
Note: This parameter is only available if the setting "Frame" or "MBAFF" (only
for AVC/H.264)" is selected for "Picture type".
In normal cases, an image playback rate of 24 (or 23.976) frames per second
is use; the NTSC system however requires 30 (or 29.97) frames/s, and there is
a special algorithm for converting the video's frame rate. For compilations or
test purposes, switch this option to "No". In normal cases, the setting can be
set to "Auto".
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.
Bit 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 for the video
to be encoded.
Mode
 Constant bit rate: The constant bit rate should only be used if the device used
to play the video supports constant bit rates.
 Constant quantizer:
 Variable bit rate: The bit rate varies. For faster movements in the video, the bit
rate increases, and for still images or slow pans, a lower bit rate is sufficient for
creating the video in constant quality.
Pass
 Single pass: The encoder process takes place without prior analysis. This
requires the least amount of time, however quality suffers.
 Multi-pass analysis: The first encoding is carried out at the same time as the
analysis for the second encoding is calculated.
 Multi-pass encode: The first encoding is carried out at the same time as the
analysis for the second encoding is calculated and updated. This produces the
best results, but the process requires the most time.
Bit rate (Bits/s)
 In "Constant bit rate" mode: Exactly those values entered are applied to be
able to calculate the size of the video precisely.