4 ms·
Summary: VBR encodes videos with a variable bit-rate throughout the video. By fingerprinting many videos, recording the bitrate at different parts of the video,
by kbaker 10y ago
Summary: VBR encodes videos with a variable bit-rate throughout the video. By fingerprinting many videos, recording the bitrate at different parts of the video, they can make a guess at what you are watching by looking at the size of the stream being downloaded while watching the video, even with HTTPS, likely even over a VPN.
- tashbarg 10y agoVery rough analogy: Whoever delivers your parcels can tell if you ordered parts to assemble a jumbo jet or a lawn mower just by looking at the quantity, size and sequence of parcels. Since it is known what kind of blueprints you have (the netflix library), it's not too hard to match the parcel sequence (or a part of it) to the order list of a known blueprint.