Page 339 - Manual_Movie Edit Pro 2021_EN_Neat

MPEG-4 encoder settings 339

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.

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: In this mode, a fixed colour quantization is used for the
macro blocks. Under Advanced settings, a value between 1 and 32 can be set
independent of the respective frame (I-Frame (view page 348), P-Frame, or
B-Frame (view page 350)). The higher the value, the stronger the quantization:
small values produce qualitatively high-quality images and the data rate
increases, and larger values produce a reduction in data, but the quality suffers.
• 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

Here you can choose whether you want to manually perform one-pass or multi-pass
encodings (2-pass, multi-pass)

Note: The 2-pass option in the main dialog of the MPEG-4 export is recommended.
This automatically performs two encoder passes.

If you want to perform 2-pass encoding manually, you must select "Multi-pass
analysis" in the first pass and "Multi-pass encode" in the second pass.

• Single pass: The encoder process takes place without prior analysis. This
requires the least amount of time.
• Multi-pass analysis: Analysis data is calculated during encoding and used for
multi-pass encoding.
• Multi-pass encode: Assumes that an analysis has already been performed The
analysis data is used during encoding to optimize the results.