MAST: Multimodal Abstractive Summarization with Trimodal Hierarchical Attention

Code for EMNLP NLPBT 2020 paper.

Model Architecture

Running Instructions

Dataset

MAST is trained on the 300h version of the How2 dataset: https://github.com/srvk/how2-dataset, which includes audio, video and text.

Dependencies

pip install nmtpytorch
git clone https://github.com/amankhullar/mast.git

• Replace <path_to_env>/bin/nmtpy with file mast/nmtpy
• Replace folder <path_to_env>/lib/python3.6/site-packages/nmtpytorch with folder mast/nmtpytorch

Train

CUDA_VISIBLE_DEVICES=<gpu_id> nmtpy train -C <path_for_conf_file>

Test

CUDA_VISIBLE_DEVICES=<gpu_id> nmtpy test -b <batch_size> <model_ckpt_path> -m eval -s test

Loading checkpoint

In order to load a pretrained model, add the argument 'pretrained_file' in the conf file with the path of the ckpt file as its value.

Rouge score calculation

Following script combines the predictions and targets in single files (all_hyp.txt and all_ref.txt) where each line is a prediction or a target in their respective files.

python combine_txts.py

This command calculates the Rouge 1,2 and L scores and stores them in the rouge_scores_sotah3.csv (please change name according to convenience).

python -m rouge.rouge --target_filepattern=all_refs.txt --prediction_filepattern=all_hyps.txt --output_filename=rouge_scores_sotah3.csv --use_stemmer=true

To generate the attention on words from the transcript, run :

python text_attention.py

This saves the file highlight.tex inside the respective folder in the att_wts dir.

Content F1 and other metrics

Install the nlg-eval library and modify the file at <path_to_env>/lib/python3.7/site-packages/nlgeval/pycocoevalcap/meteor/meteor.py, changing the meteor_cmd to:

meteor_cmd = ['java', '-jar', '-Xmx{}'.format(mem), METEOR_JAR,
                    #  '-', '-', '-stdio', '-l', 'en', '-norm']
                     '-', '-', '-stdio', '-l', 'en', '-norm', '-p', "1 1 0 0"]

which updates the values of the hyperparameters required for Content-F1 metric.

To generate visualizations

To get heatmaps run :

python get_heatmaps.py

To get heatmaps for only those examples where the predicted summary is shorter than the target summary (to account for decoder non tag)

python get_new_heatmaps.py