webrtcHacks - Guides and information for WebRTC developers

Time 2021-01-13 05:03:41

Web Name: webrtcHacks - Guides and information for WebRTC developers

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Chrome recently added the option of adding redundancy to audio streams using the RED format as defined in RFC 2198, and Fippo wrote about the process and implementation in a previous article. You should catch-up on that post, but to summarize quickly RED works by adding redundant payloads with different timestamps in the same packet. If you lose a packet in a lossy network then chances are another successfully received packet will have the missing data resulting in better audio quality.That was in a simplified one-to-one scenario, but audio quality issues often have the most impact on larger multi-party calls. As a follow-up to Fippo’s post, Jitsi Architect and Improving Scale and Media Quality with Cascading SFUs author Boris Grozev walks us through his design and tests for adding audio redundancy to a more complex environment with many peers routing media through a Selective Forwarding Unit (SFU).... Continue readingTwitterFacebookLinkedin webrtcH4cKS: ~ RED: Improving Audio Quality with Redundancy Posted by Philipp Hancke on August 20, 2020WebRTC has made getting and sending real time video streams (mostly) easy. The next step is doing something with them, and machine learning lets us have some fun with those streams. Last month I showed how to run Computer Vision (CV) locally in the browser. As I mentioned there, local is nice, but sometimes more performance is needed so you need to run your Machine Learning inference on a remote server. In this post I’ll review how to run OpenCV models server-side with hardware acceleration on Intel chipsets using Intel’s open source Open WebRTC Toolkit (OWT).... Continue readingTwitterFacebookLinkedin webrtcH4cKS: ~ Does your video call have End-to-End Encryption? Probably not.. Posted by Philipp Hancke on April 1, 2020Time for another opinionated post. This time on… end-to-end encryption (e2ee). Zoom apparently claims it supports e2ee while it can not satisfy that promise. Is WebRTC any better?Zoom does not have End to End EncryptionLet s get to the bottom of things fast: Boo Zoom!I reviewed how Zoom’s implements their web client last year.I’m not really surprised of their general lack of e2ee given that their web client did not provide any encryption on top of TLS or WebRTC’s DataChannel. For reasons we will discuss below, this means they weren’t doing any obvious e2ee there.... Continue readingTwitterFacebookLinkedin webrtcH4cKS: ~ Stop touching your face using a browser and TensorFlow.js Posted by Chad Hart on March 19, 2020Don’t touch your face! To prevent the spread of disease, health bodies recommend not touching your face with unwashed hands. This is easier said than done if you are sitting in front of a computer for hours.  I wondered, is this a problem that can be solved with a browser?We have a number of computer vision + WebRTC experiments here. Experimenting with running computer vision locally in the browser using TensorFlow.js has been on my bucket list and this seemed like a good opportunity. A quick search revealed somebody already thought of this 2 week ago. That site used a model that requires some user training which is interesting but can make it flaky. It also wasn’t open source for others to expand on, so I did some social distancing via coding isolation over the weekend to see what was possible.... Continue readingTwitterFacebookLinkedin

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