# insertable-streams
insertable-streams demonstrates how to use insertable streams with WebRTC.rs.
This example modifies the video with a single-byte XOR cipher before sending, and then
decrypts in Javascript.
insertable-streams allows the browser to process encoded video. You could implement
E2E encryption, add metadata or insert a completely different video feed!
## Instructions
### Create IVF that contains a VP8 track
```shell
ffmpeg -i $INPUT_FILE -g 30 output.ivf
```
### Open insertable-streams example page
[jsfiddle.net](https://jsfiddle.net/t5xoaryc/) you should see two text-areas and a 'Start Session' button. You will also have a 'Decrypt' checkbox.
When unchecked the browser will not decrypt the incoming video stream, so it will stop playing or display certificates.
### Run insertable-streams with your browsers SessionDescription as stdin
Copy the string in the first input labelled `Browser base64 Session Description`
#### Linux/macOS
Run `echo $BROWSER_SDP | cargo run --example insertable-streams -- --video <path/to/ivf/file>`
`$BROWSER_OFFER` is the value you copied in the last step.
#### Windows
1. Paste the copied string in the last step into a file.
1. Run `cargo run --example insertable-streams < my_file -- --video <path/to/ivf/file>`
### Input insertable-streams's SessionDescription into your browser
Copy the text that `insertable-streams` just emitted and copy into second text area
### Hit 'Start Session' in jsfiddle, enjoy your video!
A video should start playing in your browser above the input boxes. `insertable-streams` will exit when the file reaches the end.
To stop decrypting the stream uncheck the box and the video will not be viewable.
Congrats, you have used WebRTC.rs!