User manual

MPEG-4 encoder settings 145
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Field order
Note: This parameter is only available if the setting "Field" is selected
for "Picture type".
In case of interlaced streams, the half-image sequence is set. Read
more about this explanation regarding "Interlace (view page 131)".
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