Mmaction2

We are excited to announce the release of MMAction2 v1.0.0rc0.
MMAction2 1.0.0beta is the first version of MMAction2 1.x, a part of the OpenMMLab 2.0 projects.
Built upon the new [training engine](https://github.com/open-mmlab/mmengine).

**Highlights**

- **New engines**. MMAction2 1.x is based on MMEngine\](https://github.com/open-mmlab/mmengine), which provides a general and powerful runner that allows more flexible customizations and significantly simplifies the entrypoints of high-level interfaces.

- **Unified interfaces**. As a part of the OpenMMLab 2.0 projects, MMAction2 1.x unifies and refactors the interfaces and internal logics of train, testing, datasets, models, evaluation, and visualization. All the OpenMMLab 2.0 projects share the same design in those interfaces and logics to allow the emergence of multi-task/modality algorithms.

- **More documentation and tutorials**. We add a bunch of documentation and tutorials to help users get started more smoothly. Read it [here](https://github.com/open-mmlab/mmaction2/blob/1.x/docs/en/migration.md).

**Breaking Changes**

In this release, we made lots of major refactoring and modifications. Please refer to the [migration guide](../migration.md) for details and migration instructions.

This release is meant to fix the compatibility with the latest mmcv v1.6.1

**Highlights**

- Support different seeds

**New Features**

- Add lateral norm in multigrid config ([1567](https://github.com/open-mmlab/mmaction2/pull/1567))
- Add openpose 25 joints in graph config ([1578](https://github.com/open-mmlab/mmaction2/pull/1578))
- Support MLU Backend ([1608](https://github.com/open-mmlab/mmaction2/pull/1608))

**Bug and Typo Fixes**

- Fix local_rank ([1558](https://github.com/open-mmlab/mmaction2/pull/1558))
- Fix install typo ([1571](https://github.com/open-mmlab/mmaction2/pull/1571))
- Fix the inference API doc ([1580](https://github.com/open-mmlab/mmaction2/pull/1580))
- Fix zh-CN demo.md and getting_started.md ([1587](https://github.com/open-mmlab/mmaction2/pull/1587))
- Remove Recommonmark ([1595](https://github.com/open-mmlab/mmaction2/pull/1595))
- Fix inference with ndarray ([1603](https://github.com/open-mmlab/mmaction2/pull/1603))
- Fix the log error when `IterBasedRunner` is used ([1606](https://github.com/open-mmlab/mmaction2/pull/1606))

**Highlights**

- Support different seeds
- Provide multi-node training & testing script
- Update error log

**New Features**

- Support different seeds([1502](https://github.com/open-mmlab/mmaction2/pull/1502))
- Provide multi-node training & testing script([1521](https://github.com/open-mmlab/mmaction2/pull/1521))
- Update error log([1546](https://github.com/open-mmlab/mmaction2/pull/1546))

**Documentations**

- Update gpus in Slowfast readme([1497](https://github.com/open-mmlab/mmaction2/pull/1497))
- Fix work_dir in multigrid config([1498](https://github.com/open-mmlab/mmaction2/pull/1498))
- Add sub bn docs([1503](https://github.com/open-mmlab/mmaction2/pull/1503))
- Add shortcycle sampler docs([1513](https://github.com/open-mmlab/mmaction2/pull/1513))
- Update Windows Declaration([1520](https://github.com/open-mmlab/mmaction2/pull/1520))
- Update the link for ST-GCN([1544](https://github.com/open-mmlab/mmaction2/pull/1544))
- Update install commands([1549](https://github.com/open-mmlab/mmaction2/pull/1549))

**Bug and Typo Fixes**

- Update colab tutorial install cmds([1522](https://github.com/open-mmlab/mmaction2/pull/1522))
- Fix num_iters_per_epoch in analyze_logs.py([1530](https://github.com/open-mmlab/mmaction2/pull/1530))
- Fix distributed_sampler([1532](https://github.com/open-mmlab/mmaction2/pull/1532))
- Fix cd dir error([1545](https://github.com/open-mmlab/mmaction2/pull/1545))
- Update arg names([1548](https://github.com/open-mmlab/mmaction2/pull/1548))

**Highlights**

- Support Multigrid training strategy
- Support CPU training
- Support audio demo
- Support topk customizing in models/heads/base.py

**New Features**

- Support Multigrid training strategy([1378](https://github.com/open-mmlab/mmaction2/pull/1378))
- Support STGCN in demo_skeleton.py([1391](https://github.com/open-mmlab/mmaction2/pull/1391))
- Support CPU training([1407](https://github.com/open-mmlab/mmaction2/pull/1407))
- Support audio demo([1425](https://github.com/open-mmlab/mmaction2/pull/1425))
- Support topk customizing in models/heads/base.py([1452](https://github.com/open-mmlab/mmaction2/pull/1452))

**Documentations**

- Add OpenMMLab platform([1393](https://github.com/open-mmlab/mmaction2/pull/1393))
- Update links([1394](https://github.com/open-mmlab/mmaction2/pull/1394))
- Update readme in configs([1404](https://github.com/open-mmlab/mmaction2/pull/1404))
- Update instructions to install mmcv-full([1426](https://github.com/open-mmlab/mmaction2/pull/1426))
- Add shortcut([1433](https://github.com/open-mmlab/mmaction2/pull/1433))
- Update modelzoo([1439](https://github.com/open-mmlab/mmaction2/pull/1439))
- add video_structuralize in readme([1455](https://github.com/open-mmlab/mmaction2/pull/1455))
- Update OpenMMLab repo information([1482](https://github.com/open-mmlab/mmaction2/pull/1482))

**Bug and Typo Fixes**

- Update train.py([1375](https://github.com/open-mmlab/mmaction2/pull/1375))
- Fix printout bug([1382]((https://github.com/open-mmlab/mmaction2/pull/1382)))
- Update multi processing setting([1395](https://github.com/open-mmlab/mmaction2/pull/1395))
- Setup multi processing both in train and test([1405](https://github.com/open-mmlab/mmaction2/pull/1405))
- Fix bug in nondistributed multi-gpu training([1406](https://github.com/open-mmlab/mmaction2/pull/1406))
- Add variable fps in ava_dataset.py([1409](https://github.com/open-mmlab/mmaction2/pull/1409))
- Only support distributed training([1414](https://github.com/open-mmlab/mmaction2/pull/1414))
- Set test_mode for AVA configs([1432](https://github.com/open-mmlab/mmaction2/pull/1432))
- Support single label([1434](https://github.com/open-mmlab/mmaction2/pull/1434))
- Add check copyright([1447](https://github.com/open-mmlab/mmaction2/pull/1447))
- Support Windows CI([1448](https://github.com/open-mmlab/mmaction2/pull/1448))
- Fix wrong device of class_weight in models/losses/cross_entropy_loss.py([1457](https://github.com/open-mmlab/mmaction2/pull/1457))
- Fix bug caused by distributed([1459](https://github.com/open-mmlab/mmaction2/pull/1459))
- Update readme([1460](https://github.com/open-mmlab/mmaction2/pull/1460))
- Fix lint caused by colab automatic upload([1461](https://github.com/open-mmlab/mmaction2/pull/1461))
- Refine CI([1471](https://github.com/open-mmlab/mmaction2/pull/1471))
- Update pre-commit([1474](https://github.com/open-mmlab/mmaction2/pull/1474))
- Add deprecation message for deploy tool([1483](https://github.com/open-mmlab/mmaction2/pull/1483))

**ModelZoo**

- Support slowfast_steplr([1421](https://github.com/open-mmlab/mmaction2/pull/1421))

**Highlights**

- Support 2s-AGCN
- Support publish models in Windows
- Improve some sthv1 related models
- Support BABEL

**New Features**

- Support 2s-AGCN([1248](https://github.com/open-mmlab/mmaction2/pull/1248))
- Support skip postproc in ntu_pose_extraction([1295](https://github.com/open-mmlab/mmaction2/pull/1295))
- Support publish models in Windows([1325](https://github.com/open-mmlab/mmaction2/pull/1325))
- Add copyright checkhook in pre-commit-config([1344](https://github.com/open-mmlab/mmaction2/pull/1344))

**Documentations**

- Add MMFlow ([1273](https://github.com/open-mmlab/mmaction2/pull/1273))
- Revise README.md and add projects.md ([1286](https://github.com/open-mmlab/mmaction2/pull/1286))
- Add 2s-AGCN in Updates([1289](https://github.com/open-mmlab/mmaction2/pull/1289))
- Add MMFewShot([1300](https://github.com/open-mmlab/mmaction2/pull/1300))
- Add MMHuman3d([1304](https://github.com/open-mmlab/mmaction2/pull/1304))
- Update pre-commit([1313](https://github.com/open-mmlab/mmaction2/pull/1313))
- Use share menu from the theme instead([1328](https://github.com/open-mmlab/mmaction2/pull/1328))
- Update installation command([1340](https://github.com/open-mmlab/mmaction2/pull/1340))

**Bug and Typo Fixes**

- Update the inference part in notebooks([1256](https://github.com/open-mmlab/mmaction2/pull/1256))
- Update the map_location([1262]((https://github.com/open-mmlab/mmaction2/pull/1262)))
- Fix bug that start_index is not used in RawFrameDecode([1278](https://github.com/open-mmlab/mmaction2/pull/1278))
- Fix bug in init_random_seed([1282](https://github.com/open-mmlab/mmaction2/pull/1282))
- Fix bug in setup.py([1303](https://github.com/open-mmlab/mmaction2/pull/1303))
- Fix interrogate error in workflows([1305](https://github.com/open-mmlab/mmaction2/pull/1305))
- Fix typo in slowfast config([1309](https://github.com/open-mmlab/mmaction2/pull/1309))
- Cancel previous runs that are not completed([1327](https://github.com/open-mmlab/mmaction2/pull/1327))
- Fix missing skip_postproc parameter([1347](https://github.com/open-mmlab/mmaction2/pull/1347))
- Update ssn.py([1355](https://github.com/open-mmlab/mmaction2/pull/1355))
- Use latest youtube-dl([1357](https://github.com/open-mmlab/mmaction2/pull/1357))
- Fix test-best([1362](https://github.com/open-mmlab/mmaction2/pull/1362))

**ModelZoo**

- Improve some sthv1 related models([1306](https://github.com/open-mmlab/mmaction2/pull/1306))
- Support BABEL([1332](https://github.com/open-mmlab/mmaction2/pull/1332))