Hi costa98, I have the same problem as you but couldn’t find any solution… did you find the reason for this bug or did you implement a customized Dataset?
I just found the cause, incompatibility in the paths strings between the text files of train_test_splits/ and the file name of the dataset.samples. The txt files have ‘root\action/video_name’ whereas the samples are (‘root\action\video_name’, label)