This Bash script uses youtube-dl to download VODs from Twitch channels specified in the urls.txt file. It saves the videos in the folder /home/username/Videos/VODs/ and creates a folder for each channel. It also saves JSON metadata from the --print-json command of youtube-dl for each video in the folder /home/username/Videos/metadata/ and creates a folder for each channel. The metadata is dumped into a local MongoDB database.

The script supports the following command line arguments:

• --dateStart: Specifies the start date for downloading VODs. Format: YYYYMMDD.
• --dateEnd: Specifies the end date for downloading VODs. Format: YYYYMMDD. For example, to download VODs between March 1, 2023 and March 15, 2023, you would run the following command:

./vod_downloader.sh --dateStart 20230301 --dateEnd 20230315

If no command line arguments are specified, the script will download VODs from the day before the current date until the current date.

The URLs file is located at urls.txt and contains the list of Twitch channels to download VODs from. The format of each line should be:

https://www.twitch.tv/channel_name

This script requires the following dependencies:

• youtube-dl
• jq
• sox

To run the script, simply navigate to the directory where the script is located and run the following command:

./vod_downloader.sh

If a VOD has already been downloaded, it will be skipped. If a WAV file has already been downsampled to 16kHz, it will be skipped. The script assumes that the MongoDB server is running locally and that the database twitch-vod-downloads has already been created. The script assumes that the user running the script has read and write access to the /home/username/Videos/ directory.

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