Jintao Lin

This PR add `--off` (`--offset`) options to indicate the offset value for the output frame filename.

Add `InfiniteSampler` and `InfiniteEpochBasedRunner` The workers of dataloader will re-initialize when the iterator of dataloader is created. InfiniteSampler is designed to avoid these time-consuming operations since the iterator with InfiniteSampler...

Set bitrate to None when stream does not have bitrate

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It will raise error if the stream doesn't have 'bitrate'

About AdaFocus+

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Thanks for your great work! I want to know which part of the codes is about `AdaFouces+` since I wonder how to batch-process videos with different number of frames for...

Hello, thank you for the excllcent work. Can you provide the pretrained models in the modelzoo? The README.md says "We aim to release a model zoo for both TAN variants...


`AverageMeter` is not correct in `test.py`

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`AverageMeter` in [TIN/utils.py](https://github.com/deepcs233/TIN/blob/1aacd0c4c30d5e1d334bf023e55b855b59f158db/utils.py#L25-L54) which is used in [test.py](https://github.com/deepcs233/TIN/blob/master/test.py#L114-L117) is not correct. The `AverageMeter` in [this file](https://github.com/deepcs233/TIN/blob/1aacd0c4c30d5e1d334bf023e55b855b59f158db/utils.py#L25-L54) only calculates the acc with the history list, which is with self.length long. So...