21 lines
1.2 KiB
Text
21 lines
1.2 KiB
Text
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AverageFrames
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=============
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.. function:: AverageFrames(vnode[] clips, float[] weights[, float scale, bint scenechange, int[] planes])
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:module: std
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AverageFrames has two main modes depending on whether one or multiple *clips* are supplied.
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The filter is named AverageFrames since using ones for weights is an easy way to average
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many frames together but it can also be seen as a temporal or multiple frame convolution.
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If multiple *clips* are supplied then the frames from each of the *clips* are multiplied by
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the respective *weights*, summed together and divided by *scale* before being output. Note
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that only integer *weights* and *scale* are allowed for integer input formats.
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If a single *clip* is supplied then an odd number of *weights* are needed and they will instead
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be temporally centered on the current frame of the *clip*. The rest works as multiple *clip* mode
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with the only difference being that *scenechange* can be set to avoid averaging frames over scene
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changes. If this happens then all the weights beyond a scene change are instead applied to the frame
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right before it.
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At most 31 *weights* can be supplied.
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