what does the Class Conv2dSubampling‘s return mean?

[qiushan233]

I'm confused by the Class Conv2dSubampling in convolution.py.What does the second return output_lengths mean?

[qiushan233]

for example,when input_length==55,the output_length is wrong

[longlnOff]

Yes, I have gotten that problem when I used output length of conformer for RNNT loss in TorchAudio