jakexks

#!/usr/bin/env bash
set -ex
export TEST_CLUSTER_NAME=quick-test
export CERT_MANAGER_VERSION=v1.3.1
export KIND_IMAGE=kindest/node:v1.20.2

# Create test cluster
echo "Creating test cluster..."
kind create cluster --name="$TEST_CLUSTER_NAME" --image="$KIND_IMAGE"
until kubectl --timeout=120s wait --for=condition=Ready pods --all --namespace kube-system; do sleep 1; done

eyecatchup

Get/set ID3 meta tags using ffmpeg

A quick guide on how to read/write/modify ID3 metadata tags for audio / media files using ffmpeg.

FFmpeg has a free-form command line option that allows the user to specify key-value-pairs for encoding metadata. Let's take a look.

1. Read ID3 metadata

To list all global metadata tags for a media file, just set an input but no output file.

Brainiarc7

Tuning Intel Skylake and beyond for optimal performance and feature level support on Linux:

Note that on Skylake, Kabylake (and the now cancelled "Broxton") SKUs, functionality such as power saving, GPU scheduling and HDMI audio have been moved onto binary-only firmware, and as such, the GuC and the HuC blobs must be loaded at run-time to access this functionality.

Enabling GuC and HuC on Skylake and above requires a few extra parameters be passed to the kernel before boot.

Instructions provided for both Fedora and Ubuntu (including Debian):

Note that the firmware for these GPUs is often packaged by your distributor, and as such, you can confirm the firmware blob's availability by running:

atlury

Low-Latency Live Streaming for your Desktop using ffmpeg and netcat

Preamble:

In this post I will explore how to stream a video and audio capture from one computer to another using ffmpeg and netcat, with a latency below 100ms, which is good enough for presentations and general purpose remote display tasks on a local network.

The problem:

tomasinouk

ffmpeg -f avfoundation -i "1" -vcodec libx264 -r 10 -tune zerolatency -b:v 500k -bufsize 300k -f rtp rtp://localhost:1234

ffmpeg -f avfoundation -i "1" -vcodec libx264 -r 10 -tune zerolatency -b:v 500k -bufsize 300k -f rtp udp://127.0.0.1:1234

ffmpeg -f avfoundation -i "1" -vcodec libx264 -r 10 -tune zerolatency -b:v 500k -bufsize 300k -f mpegts udp://127.0.0.1:1234

ffmpeg -f avfoundation -i "1" -vcodec libx264 -r 10 -pix_fmt uyvy422 -tune zerolatency -b:v 500k -bufsize 300k -f mpegts udp://192.168.88.38:1234

octocat

# Note: ~/.ssh/environment should not be used, as it
#       already has a different purpose in SSH.

env=~/.ssh/agent.env

# Note: Don't bother checking SSH_AGENT_PID. It's not used
#       by SSH itself, and it might even be incorrect
#       (for example, when using agent-forwarding over SSH).

agent_is_running() {

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

lancejpollard

What is your folder-structure preference for a large-scale Node.js project?

0: Starting from Rails

This is the reference point. All the other options are based off this.

|-- app
|   |-- controllers
|   |   |-- admin

nikic

I do not recommend to use this code as it has known vulnerabilities. You may want to have a look at some more recent sandboxing project like https://github.com/fieryprophet/php-sandbox (though I can't say anything about its quality). In general though the only really safe way to sandbox PHP is to run it in a jail.