bandwidth-estimation-from-disk

bandwidth-estimation-from-disk

bandwidth-estimation-from-disk demonstrates how to use Pion's Bandwidth Estimation APIs.

Pion provides multiple Bandwidth Estimators, but they all satisfy one interface. This interface emits an int for how much bandwidth is available to send. It is then up to the sender to meet that number.

Instructions

Create IVF files named high.ivf med.ivf and low.ivf

ffmpeg -i $INPUT_FILE -g 30 -b:v .3M  -s 320x240   low.ivf
ffmpeg -i $INPUT_FILE -g 30 -b:v 1M   -s 858x480   med.ivf
ffmpeg -i $INPUT_FILE -g 30 -b:v 2.5M -s 1280x720  high.ivf

Download bandwidth-estimation-from-disk

go get github.com/cpdevs/webrtc/v3/examples/bandwidth-estimation-from-disk

Open bandwidth-estimation-from-disk example page

jsfiddle.net you should see two text-areas, 'Start Session' button and 'Copy browser SessionDescription to clipboard'

Run bandwidth-estimation-from-disk with your browsers Session Description as stdin

The output.ivf you created should be in the same directory as bandwidth-estimation-from-disk. In the jsfiddle press 'Copy browser Session Description to clipboard' or copy the base64 string manually.

Now use this value you just copied as the input to bandwidth-estimation-from-disk

Linux/macOS

Run echo $BROWSER_SDP | bandwidth-estimation-from-disk

Windows

1. Paste the SessionDescription into a file.
2. Run bandwidth-estimation-from-disk < my_file

Input bandwidth-estimation-from-disk's Session Description into your browser

Copy the text that bandwidth-estimation-from-disk just emitted and copy into the second text area in the jsfiddle

Hit 'Start Session' in jsfiddle, enjoy your video!

A video should start playing in your browser above the input boxes. When bandwidth-estimation-from-disk switches quality levels it will print the old and new file like so.

Switching from low.ivf to med.ivf
Switching from med.ivf to high.ivf
Switching from high.ivf to med.ivf

Congrats, you have used Pion WebRTC! Now start building something cool