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Appendix
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Appendix

More Settings

VPX Settings - More Tab

[Key Framing] [Decoder Buffer Model]


The Key Framing section includes the following parameters:

  • Placement Mode indicates whether the encoder should place keyframes at a fixed interval, or determine the optimal placement automatically (as governed by the Min Interval and Max Interval parameters).

  • Min Interval, expressed as a number of frames, prevents the encoder from placing a keyframe nearer than at the min interval to the previous keyframe. The frames from the min interval, non-keyframes, will be coded before the next keyframe. Set min interval equal to max interval for a fixed interval.

  • Max Interval, expressed as a number of frames, forces the encoder to code a keyframe if one has not been coded in the last frames from the max interval. A value of 0 implies all frames will be keyframes. Set min interval equal to max interval for a fixed interval.

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The Decoder Buffer Model section includes the following parameters:

  • Buffer Size indicates the amount of data that may be buffered by the application. This value is expressed in milliseconds.

  • Buffer Initial Size indicates the amount of data that will be buffered by the application prior to beginning playback. This value is expressed in milliseconds.

  • Buffer Optimal Size indicates the amount of data that the encoder should try to maintain in the decoder's buffer. This value is expressed in milliseconds.

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If you are not sure which settings to use you can press the Restore Defaults button to discard the changes and restore default settings.

When ready press the OK button to accept the changes you have made.

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