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PREPARING_UCF101.md

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Preparing UCF-101

For more details, please refer to the official website. We provide scripts with documentations. Before we start, please make sure that the directory is located at $MMACTION/data_tools/ucf101/.

Prepare annotations

First of all, run the following script to prepare annotations.

bash download_annotations.sh

Prepare videos

Then, use the following script to prepare videos.

bash download_videos.sh

Extract frames

Now it is time to extract frames from videos. Before extraction, please refer to DATASET.md for installing dense_flow. If you have some SSD, then we recommend extracting frames there for better I/O performance. The extracted frames (RGB + Flow) will take up ~100GB.

# execute these two line (Assume the SSD is mounted at "/mnt/SSD/")
mkdir /mnt/SSD/ucf101_extracted/
ln -s /mnt/SSD/ucf101_extracted/ ../data/ucf101/rawframes

If you didn't install dense_flow in the installation or only want to play with RGB frames (since extracting optical flow can be both time-comsuming and space-hogging), consider running the following script to extract RGB-only frames.

bash extract_rgb_frames.sh

If both rgb and optical flow are required, run the following script to extract frames alternatively.

bash extract_frames.sh

Generate filelist

Run the follow script to generate filelist in the format of rawframes and videos.

bash generate_filelist.sh

Folder structure

In the context of the whole project (for ucf101 only), the folder structure will look like:

mmaction
├── mmaction
├── tools
├── configs
├── data
│   ├── ucf101
│   │   ├── ucf101_{train,val}_split_{1,2,3}_rawframes.txt
│   │   ├── ucf101_{train,val}_split_{1,2,3}_videos.txt
│   │   ├── annotations
│   │   ├── videos
│   │   │   ├── ApplyEyeMakeup
│   │   │   │   ├── v_ApplyEyeMakeup_g01_c01.avi

│   │   │   ├── YoYo
│   │   │   │   ├── v_YoYo_g25_c05.avi
│   │   ├── rawframes
│   │   │   ├── ApplyEyeMakeup
│   │   │   │   ├── v_ApplyEyeMakeup_g01_c01
│   │   │   │   │   ├── img_00001.jpg
│   │   │   │   │   ├── img_00002.jpg
│   │   │   │   │   ├── ...
│   │   │   │   │   ├── flow_x_00001.jpg
│   │   │   │   │   ├── flow_x_00002.jpg
│   │   │   │   │   ├── ...
│   │   │   │   │   ├── flow_y_00001.jpg
│   │   │   │   │   ├── flow_y_00002.jpg
│   │   │   ├── ...
│   │   │   ├── YoYo
│   │   │   │   ├── v_YoYo_g01_c01
│   │   │   │   ├── ...
│   │   │   │   ├── v_YoYo_g25_c05

For training and evaluating on UCF101, please refer to GETTING_STARTED.md.