Convert to h5 is fine, but failed to further convert to coreml model about yolov3-coreml

[tobyglei]

Same thing happened to me. It was because the convert.py script didn't specify the dimensions.
So simply change line 88 of file (https://github.com/qqwweee/keras-yolo3/blob/master/convert.py#L88) from

input_layer = Input(shape=(None, None, 3))

to

input_layer = Input(shape=(416, 416, 3))

Hope this helps!

[keithZumper]

This might be of use. I had the unpack issue and was able to solve it by specifying a defined input shape

apple/coremltools#203