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I owe a great deal of thanks to both the clarinetists and Dr. Curlette for putting a great deal of time into this piece. Chrysalis is quite challenging, both technically (because of the complex rhythms and counter-rhythms) and musically (because of the unique harmonic language). The idea behind Chrysalis is that the tiny phrases, syncopations, and runs would create the picture of a thousand. Mac OS Will Get Some Big Changes Soon Big changes are in the works for Apple's venerable MacOS, as the company prepares for a future where the desktop OS shares increasing amounts in common with both iOS and iPadOS. Crysis 3 Mac OS X. Crysis 3 is a first-person shooter video game developed by German video game developer Crytek and published by Electronic Arts for Microsoft Windows, PlayStation 3, and Xbox 360. What about Macbook/iMac owners? After two weeks of hard work, you are now able to download Crysis 3 Mac OS.

Researchers at Okta Security have stumbled across something big. Recently, they discovered a flaw in Apple's OS that would have allowed hackers to completely undermine Apple's code signing process.

While at first glance that doesn't sound so bad, the implications are terrifying. In a nutshell, code signing uses cryptographic 'signatures' to verify and validate code. If code bears the digital signature, it is considered trusted. If it's trusted, then it's given an automatic free pass, straight into the heart of any system.

Unfortunately, this flaw in Apple's code signing process dates back more than a decade. It was only recently discovered, and purely by chance at that.

An extensive forensic analysis has turned up no evidence suggesting that this exploit was ever used for nefarious purposes, which is the one silver lining in all of this.

Upon discovering the flaw, Okta personnel reached out to Apple and other vendors who could have been impacted by the flaw, including tech giants like Google, Facebook and also smaller players like VirusTotal, Objective Development, Yelp, and Carbon Black.

Apple moved swiftly and has since fixed the issue, so this one can be considered a bullet dodged.

Josh Pitts, an Okta engineer, sums the issue up:

'Different types of tools and products use code signing to implement actionable security; this includes whitelisting, antivirus, incident response and threat hunting products. To undermine a code signing implementation for a major OS would break a core security construct that many depend on for day to day security operations.'

A completely fair assessment. Thankfully (at least in this particular case), although the issue was hiding in plain sight, it does not appear to have been exploited before being fixed. We won't always be so lucky.

Released:

Chrysalis Python Cloud SDK for streaming live media

Project description

This repository houses the official Chrysalis Cloud Python SDK for use with Chryscloud.com cloud, end-to-end media streaming and analytics platform.

Chrysalis Cloud SDK aims to provide easy and powerful control over live media streaming consumption and ingestion into various machine learning libraries in the cloud.

If you're looking for a hybrid edge-cloud solution we recommend you look into our open source project Chrysalis Edge Proxy

Contents

• Usage
  • Example
• Development

Features

• Easy integration with numerous machine learning platforms
• Support for easy access to RTMP live video stream from Chrysalis Cloud (live video/audio streaming)
• Supporting for any camera that has RTMP streaming abilities
• Deals with complexities of media stream management
• Secure access media streams

Prerequisite

Check FFmpeg version:

Installation

Create environment.yml file.

You can easily add to this file dependencies and additional image manipulation libraries such as Pillow and OpenCV.

If you need GPU support, you can check how to work with Anaconda and GPU packages.

Create new conda environment:

Usage

• all returned images are in numpy format.
• all returned images are in bgr24 pixel format.

Check ChImage attributes for more details

Probe

Probing returns information about the streaming media. Synth dash mac os. It gives you a sense if the camera is streaming, when it was last seen, what is the frame cache duration stored on the Chrysalis streaming server.

The ProbeInfo object returns the information about cached frames as well as assessment of FPS (frames per second) streamed from the camera.

start_timestamp and end_timestamp are UTC times in milliseconds since epoch.

Retrieve latest video image from a live stream

Chrysalis Cloud Python SDK takes care of delivering crisp and clear images from your live video stream, regardless of the processing speeds, speed ups or slow downs because of the latency or even if your camera disconnects from the network.

ChImage object returned from VideoLatestImage has a following structure:

VideoLatestImage returns None image when frame not available.

VideoLatestImage might return None in cases when querying for the next frame is faster than the camera stream produces them.

The SDK will not return already consumed frames (images) in the perpetual reading of the stream.

You can also consume live stream images from mutliple sinks in case when you need to run the same live stream (e.g. the same image) through multiple Computer Vision algorithms. Not returning already consumed frames applies per SDK instance basis.

Retrieve video images from the past

Based on what is available in the frame cache on Chrysalis streaming nodes you can also query video images from the past. Use Probing in case you need more information how much back in time you can query the video stream.

Thumbnail image from video stream

Thumbnails are in bgr24 format in numpy array. In fact all images for local consumption are in the same format. This makes it easy to consume images in any processing and analytics after.

Due to the nature of H.264 straming it is not guaranteed the successfulness of the Screenshot method. In case no screenshot was found img = None.

This function tries to traverse the H.264 buffered stream seeking for I-Frame. the closest I-Frame to given dt (timestamp) is returned if I-Frame found.

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Turn Storage On and Off

Based on video analysis you can decide to store a stream into the permanent Chrysalis Cloud storage. Since live video form a webcam might be streaming 24/7 we don't necessarily need to store everything, but rather we can perform simple analysis (e.g. movement detection, face recognition, …) to decide when and for how long we want to permanently store that video segment.

Coming soon

Example

All examples are in /examples folder. Create conda environment from prepared environment.yml in examples folder before you run the examples.

Display live stream with OpenCV

Install FFmpeg

Mac OS X

Ubuntu >= 18.04 LTS

On Ubuntu 18.04 LTS everything can come from the default sources:

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Ubuntu < 18.04 LTS

On older Ubuntu releases you will be unable to satisfy these requirements with the default package sources. We recommend compiling and installing FFmpeg from source. For FFmpeg:

Installing

This should install it's dependencies also.

Please read CONTRIBUTING.md for details on our code of conduct, and the process of submitting pull requests to us.

Current version is initial release - 1.0.0

This project is licensed under Apache 2.0 License - see the LICENSE for details.

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Hashes for chrysalis-1.0.0-py3-none-any.whl

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Vulnerability In Mac OS Went Unnoticed For Years | Chrysalis MSP