Regarding the issue of missing files after the Generate AVLMaps Dataset step

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After I used the command python dataset/generate_dataset.py, the structure under the directory /avl/AVLMaps/data/vln_data/avlmaps_dataset/5LpN3gDmAk7_1/audio_video is like this, and no .mp4 files were generated. What could be the reason for this? Thank you very much!

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It is just like this:

(avlmaps) dwl@dwl:~/avl/AVLMaps/data/vln_data/avlmaps_dataset/5LpN3gDmAk7_1/audio_video$ tree -L 2
.
├── 000000
│   ├── meta.txt
│   ├── poses.txt
│   ├── range_and_audio_meta_level_1.txt
│   ├── range_and_audio_meta_level_2.txt
│   ├── range_and_audio_meta_level_3.txt
│   └── rgb
├── 000001
│   ├── meta.txt
│   ├── poses.txt
│   ├── range_and_audio_meta_level_1.txt
│   ├── range_and_audio_meta_level_2.txt
│   ├── range_and_audio_meta_level_3.txt
│   └── rgb