Number of channels to convolve per group ({1}, specified by the size of the first 'U' dimension of the weights) times th

[matlab1]

{0}: number of channels in the first argument,
{1}: number of channels per group in the weights,
{2}: number of groups

Number of channels to convolve per group ({1}, specified by the size of the first 'U' dimension of the weights) times the number of groups ({2}, specified by the size of the second 'U' dimension of the weights) must be equal to the size of the 'C' dimension of the input data ({0})