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pixelperfectionist/admin/bando/demos/WTVideo.svelte.md

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The WebTorrent project provides a way for websites to share the bandwidth load with the users viewing content. It works on almost any content, but the first thing I I implemented is for Video.

Getting Media

This demo is found in admin/bando/demos/WTVideos.svelte and it is coded to expect a sample image, video and torrent file at:

  • /images/sample_video.mp4
  • /images/sample_image.jpg
  • /images/sample_video.mp4.torrent

If you want it to work locally, grab a video and an image and place them there, then use mktorrent as described next.

Making the .torrent

This will most likely only work if you have your server on 127.0.0.1 since the torrent file is configured for that. Also, the default npm run dev will run the simple tracker implementation found in services/tracker.js. If you want to generate the torrents again then run:

mktorrent -v -w http://127.0.0.1:5001/images/sample_video.mp4 \
  -a ws://127.0.0.1:9001/ \
  -o static/images/sample_video.mp4.torrent \
  -p -l 18 static/images/sample_video.mp4
cp -r static/images public/images

It uses the mktorrent to generate the torrent since it is faster. Be careful of the WebTorrent specific options I use in the mktorrent that are needed for WebTorrent to understand the torrent:

  • -p -- Sets the private flag. This isn't needed for WebTorrent but is needed if you want to add extra protections to people accessing your content only after they log in.
  • -l 18 -- Sets the piece length to 18, which is what WebTorrent seems to need.
  • -w 127.0.0.1 -- Sets an initial web URL to use as a source. You should remove this if you want them to only go through the tracker and other users.
  • -a ws://127.0.0.1:9001/ -- Tells WebTorrent where the tracker is located.

Bugs

  1. It looks like WebTorrent has a problem getting the last chunk in some situations and I'm quite sure why. If you have an idea let me know.

Download Link

If you want to let people download the video then add the download={ true } property.