Unable to install "decord"

[Hepta-Col]

It seems that my running environment does not support "decord", even if I build from source, but it is needed in the "train a recognizer on the customized dataset" part in the tutorial you provide. I know from your features that I can "decompose a video understanding framework into different components", so is there any way that I can continue this tutorial without installing "decord", like change another similar package? Thank you very much!

[kennymckormick]

The command pip install decord doesn't work?

[Hepta-Col]

No, it didn't work. It says "could not find a version that satisfies the requirement decord (from versions: none) and "no matching distribution found for decord".

[dreamerlin]

An alternative is to use PYAV and MMCV (same to OpenCV),

https://github.com/open-mmlab/mmaction2/blob/master/mmaction/datasets/pipelines/loading.py#L726-L865
https://github.com/open-mmlab/mmaction2/blob/master/mmaction/datasets/pipelines/loading.py#L1139-L1239

change the class name in config files

https://github.com/open-mmlab/mmaction2/blob/master/configs/recognition/tsn/tsn_r50_video_1x1x8_100e_kinetics400_rgb.py#L16
https://github.com/open-mmlab/mmaction2/blob/master/configs/recognition/tsn/tsn_r50_video_1x1x8_100e_kinetics400_rgb.py#L18

[kennymckormick]

No, it didn't work. It says "could not find a version that satisfies the requirement decord (from versions: none) and "no matching distribution found for decord".

Maybe there's sth wrong with your pip or network condition? (from versions: none) indicates that you can not find any version of this package. Try a new pip source & check your network condition.

[kennymckormick]

An alternative is to use PYAV and MMCV (same to OpenCV),

https://github.com/open-mmlab/mmaction2/blob/master/mmaction/datasets/pipelines/loading.py#L726-L865 https://github.com/open-mmlab/mmaction2/blob/master/mmaction/datasets/pipelines/loading.py#L1139-L1239

change the class name in config files

https://github.com/open-mmlab/mmaction2/blob/master/configs/recognition/tsn/tsn_r50_video_1x1x8_100e_kinetics400_rgb.py#L16 https://github.com/open-mmlab/mmaction2/blob/master/configs/recognition/tsn/tsn_r50_video_1x1x8_100e_kinetics400_rgb.py#L18

I think opencv may not be a working alternative, it's extremely slow.

[Grutschus]

Apparently, this is an issue with decord not being properly maintained anymore. See this issue here.
Basically, they have stopped releasing wheels for Mac for Python>=3.9. A solution could be to change the dependency of mmaction2 to eva-decord.
I will try that.

[NilsBaumgartner1994]

big ouuffff.

[AnshVM]

any fix for this?

[BoomSky0416]

The essential reason is that decord doesn't support arm64. And decord is used to decode video in this repo. You can comment out this requirement in requirements/build.txt. And replace DecordInit and DecordDecode with OpenCVInit and OpenCVDecode in the pipeline of configs.