Am 20.03.2021 um 04:31 schrieb Mark Filipak (ffmpeg):
:         :       :
              :         :       Specify scale, if it is set it will be multiplied with sum of each weight multiplied with pixel values to give final destination pixel value. By default scale is auto scaled to sum of weights.

Correct would be "By default scale is set to (1 / sum_of weights)".
The same error is also in the documentation of the "tmix" filter.

  Is there one scale for all inputs or one scale per input?

One for all inputs.

Criticism (re, "Specify weight"): "If number of weights is smaller than number of frames" -- Huh?

"number of inputs"
The same error is also in the documentation of the "tmix" filter.

Michael
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