Syntax:

startextension = <integer>;

Option:

-S <start>

Range:

Unbounded integer.

Default:

Rounded down integer from startframe.

Purpose:

To specify the starting extension number of the output pix file for an animation.

Comments:

Useful for occasions when the byframe and/or startframe of an animation are non-integer and you want the files to be numbered as integers when output by the renderer.

Example:

startextension = 4;