synthia dataset get unexpected json

[ShenZheng2000]

I preprocess the synthia dataset using your code below.

python tools/convert_datasets/synthia.py data/synthia/ --nproc 8

However, the sample_with_class.json is empty, as shown below.

Therefore, when I train the model (synthia to cityscape), I met the following error:

[ZHE-SAPI]

the label dataset may be wrong