Confusion in preparing custom data in AVA like format to train Spatio temporal model

[Arvind Chandel]

Hi, I read about AVA dataset and tried to know about, how to prepare AVA like data for new activity. There are some dots still left, if i get some help on below points:

1. In config file we provide path of 'data/ava/rawframes' where 27K (approx) frames for generated from 15 min video file, the Naming style of these frames are 'img_00XXX.jpg' . Is there any link between timestamp column in train/val csv file to these frames in rawframes folder. Because in rawframes folder 27K frames are generated, means for 15 min video, 30 frames produced for each 1 sec.
2. I hope you get my question about how training program maping the frames looking at the timestamp value in train/val csv file.
3. Last confusion is, once my files are ready, what other entries (if needed) in config file along with 'num_classes' , should be changed to train model on my new classes.

Thanks!