when I submit to the site https://competitions.codalab.org/competitions/17136#participate-submit_results, failed and output like this:
Error:
invalid file type()
I check my zip file, it is like submission.zip, inside is submission.zip/frame*.png.
Some common errors may lead to a submission failure. Please check your submission file to make sure it is in the correct format:
1. All .png files are packaged under the root folder of the .zip, and the file names are exactly the same as the test images, such as COCO_test2014_000000000001.png
2. All .png files are single-channel grayscale images. If they have multiple color channels, the evaluation will fail.