There is no update from you for a period, assuming this is not an issue anymore. Hence we are closing this topic. If need further support, please open a new one. Thanks
For your existing result, is the mAP still near 0 from tao evaluation? Could you run tao inference to double check?
More, you can also train from scratch against your training dataset. That means training without the peoplenet pretrained model. Usually, mAP 0 is not expected. For input size, you can consider using average resolution of the training dataset. For example, 512x512.