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Homepage and blog by Scott Laird

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Streaming both HDR and SDR Video With Shaka Player and Packager

Earlier today, I posted a video of Mount Rainier at dawn . As I’ve been doing lately, I mastered the video in HDR at 8k resolution. My streaming-video-encoding process produces a bunch of lower-resolution copies of the video, so there’s no big downside to mastering in 8k, and in limited testing I’ve had okay luck with showing HDR video on SDR devices, Most players are able to down-convert video…

Rainier at Dawn

When I was younger, I’d occasionally go out fishing or golfing with my dad or brothers. I don’t really have anything against fishing or golfing, but I always saw them as more of an excuse to go spend time outdoors rather than activities that I enjoyed for their own sake. For me, the best way to improve golf is to leave the clubs at home, skip buying yet another box of balls, As I understand the…

Diablo Lake

Diablo Lake in Washington State’s North Cascades is pretty iconic. The lake’s water is a deep turquoise due to glacier melt, and it sits in the middle of a deep, heavily forested valley. There are a lot of Diablo Lake pictures kicking around; it’s probably the single-most recognizable natural location in Western Washington. This is the first time in a while when I’ve managed to catch it partially…

North Cascades

I try to go out and do outdoor photography about once per week. Usually I’ll get up early on Saturday and drive somewhere around sunrise, and then head home before crowds start showing up. Sometimes this works, sometimes it doesn’t. In June, sunrise in Seattle is just after 5 AM, and first light is somewhere around 4 AM. I’m not really a morning person by nature, so I’m not always tremendously…

VyOS on a Mellanox Switch, part 2

In part 1 , I discussed installing VyOS on a Mellanox SN2010 Ethernet switch. In this part, I’ll discuss getting VyOS usable on the SN2010, managing noise, and running it on other members of the Mellanox Spectrum switch family, like the SN3800. Why, again Mellanox’s Spectrum family of switches (SNxxxx models) are unique among high-powered Ethernet switches in that they’re completely Well, almost…

Big Four in Spring

The Seattle area has mild winters, especially compared to most of the rest of the northern US, but the Cascade Mountains that run down the length of the state can spend half of the year snowed in. Example: the Mt. Baker Ski Area, a few miles further north, had 1,140 inches / 29m of snow during the 1998-99 season . Roads start closing in November and some don’t open until July. One of my favorite…

Grafana table joins with SQL expressions

Previously, I showed how to combine two Prometheus queries into a single table in Grafana , and how to format the table with data links so that the entire table doesn’t turn into a giant HTML link by using a mix of Grafana’s data transformations and field overrides. There’s actually a much cleaner way to do table transformations, if you’re using a recent enough version of Grafana with optional…

Formatting data links in Grafana tables

Data links are Grafana ’s way to add HTML links to a dashboard, but they don’t quite work the way you’d expect them to with tables. Suppose you have a table like this (from my previous post ): Now, suppose you want to add a couple links here, one to a per-pod Grafana dashboard and one to a Kubernetes admin dashboard. In real life, you’d probably want to add a Grafana template here, like…

Creating tables in Grafana from multiple Prometheus Metrics

I have kind of a love/hate relationship with Grafana , Specifically, the Grafana dashboard product from the company also known as Grafana . In general, when I say “Grafana”, I mean the dashboard service, not the company as a whole. the open-source monitoring dashboard service. On the plus side, it works better than any of its alternatives, it’s mostly free It’s licensed under the AGPL and some of…

Tulips

Every spring Washington’s Skagit Valley An hour or so north of my home. has a massive Tulip Festival that attracts hundreds of thousands of visitors. If you live (or drive) in the area, then it’s critically important to know when the tulips bloom so you avoid accidentally getting stuck in tulip traffic. It gridlocks to every road for miles around, and I’ve seen multi-mile backups on the exits from…