./zipformer/export-onnx-streaming.py \
  --exp-dir ./zipformer/exp-w-ctc-streaming/ \
  --tokens ./data/lang_bpe_2000/tokens.txt \
  --causal 1 \
  --avg 1 \
  --epoch 20 \
  --chunk-size 32 \
  --left-context-frames 256 \
  --use-ctc 1 

./zipformer/export-onnx-streaming.py \
  --exp-dir ./zipformer/exp-w-ctc-streaming/ \
  --tokens ./data/lang_bpe_2000/tokens.txt \
  --causal 1 \
  --avg 1 \
  --epoch 20 \
  --chunk-size 16 \
  --left-context-frames 128 \
  --use-ctc 1