You can define settings for the encoding process under Encoding tools.
The following check box is available in the Baseline Profile area:
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Deblocking
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If this check box is selected, a soft-focus effect is applied to the sharp edges of the macroblocks. You can configure the intensity by using the Deblocking strength slider.
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The following setting options are available in the Main profile area:
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Check box
Bidirectional prediction
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If this check box is selected, encoding is carried out with the help of B-VOPs.
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Input field
Maximum consecutive B-frames
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Specifies the maximum number of B-frames that can be used in a GOP.
This input field is enabled only when the Bidirectional prediction check box in enabled.
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Check box
CABAC
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If this check box is selected, the Context Adaptive Binary Arithmetic Coding encoding method is used.
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Check box
Weighted prediction
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If this check box is selected, reference frames can be re-weighted during motion predictions. This increases the encoding efficiency especially during cross fading.
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Check box
Interlaced encoding
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If this check box is selected, interlaced-encoded output material can be saved as interlaced material again.
Only possible if the source video file is interlaced.
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The following check box is available in the High profile area:
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8 x 8 Transform
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If this check box is selected, the default 4×4 transform used by the encoder is changed to an 8×8 transform. This allows for better compression with high-definition resolutions.
This setting depends on the chosen profile.
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See also
| CABAC |
Context Adaptive Binary Arithmetic Coding refers to an encoding method for digital video files. CABAC is an integral part of the H.264/MPEG-4 AVC encoding standard. Instead of variable-length bit strings, a different arithmetic encoding method that makes it possible to reduce the bit rate between 10% and 20% (and therefore reduces space requirements) is used.
| GOP |
A Group of Pictures refers to a group of consecutive individual pictures in the picture flow of a video file. Each movie or video flow consists of consecutive GOP’s. The viewable individual pictures are generated from them.
| Macroblock |
A macroblock refers to a block consisting of 16×16 pixels, and constitutes the basic unit in the MPEG standard, on which motion encoding is based as well. A macroblock contains information regarding the brightness and color distribution of a video picture.