Reshape Input for Dynamic Batch Size

[akurniawan]

Hey guys, as I have written on this issue before, is there any way we can modify the input shape so that it can be more dynamic? Not only the batch_size though, if we use RNN for example, we might want to keep the length size dynamic as well

[tjingrant]

This might be more of a issue for the ONNX Spec repository. Specifically, whether it is possible to specify dimension of unknown size (I do not have an answer by searching around the ONNX spec repository). However, there seems to be a somewhat related discussion regarding the RNN feature you requested (onnx/onnx#140).

[chinhuang007]

Handling dynamic input shape is a general concern in onnx-tf. A more recent issue is opened, #464. Let's close this one and use 464 to provide updates.