ONNX exporting support.

[SuX97]

• I3D

• TSN

• TIN

• TSM

• R2+1D

• I3D

• SLOWFAST

• BMN

• BSN

[codecov]

Codecov Report

Merging #160 into master will decrease coverage by 0.10%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #160      +/-   ##
==========================================
- Coverage   85.87%   85.77%   -0.11%     
==========================================
  Files          77       77              
  Lines        4849     4849              
  Branches      765      765              
==========================================
- Hits         4164     4159       -5     
- Misses        559      561       +2     
- Partials      126      129       +3     

Flag	Coverage Δ
#unittests	85.77% <100.00%> (-0.11%)	⬇️

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Impacted Files	Coverage Δ
mmaction/models/backbones/resnet3d_slowfast.py	87.97% <100.00%> (ø)
mmaction/core/evaluation/accuracy.py	92.30% <0.00%> (-2.57%)	⬇️

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[SuX97]

All models including localizers(BMN, tem, pem) tested, ready to be merged. @innerlee

[innerlee]

cool

[innerlee]

Could you wrap the onnx import in a try catch, and put it here https://github.com/open-mmlab/mmaction2/blob/master/requirements/optional.txt?

[dreamerlin]

Remember to note this in change log. md

[innerlee]

Adding a how-to in the tutorial section of documentation would be a big plus

[SuX97]

Remember to note this in change log. md

change log and tutorial added.