std.SetFrameProp(clip clip, string prop[, bint delete=False, int[] intval, float[] floatval, string[] data])

Adds/deletes a frame property to/from every frame in clip.

If there is already a property with the name prop in the frames, it will be overwritten.

The type of the property added depends on which of the intval, floatval, or data parameters is used.

The data parameter can only be used to add NULL-terminated strings, not arbitrary binary data.

For example, to set the field order to top field first:

clip = c.std.SetFrameProp(clip, prop="_FieldBased", intval=2)