Coffee with crema from an Aeropress – a howto

What makes crema?

Crema is a foam comprising coffee oils, carbon dioxide created during coffee roasting and air trapped in coffee grounds. There are several exhaustive Coffeegeek articles in the subject. (I  also think electric-pump-based coffee/espresso machines increase crema by aerating brewing water.)

Why there is little crema in coffee from Aeropress?

Oils and bubbles, being lighter than water, travel up when brewing. When Aeropress is used as described in the manual, crema is filtered last and gets absorbed in the grounds and paper filter.

crema in inverted aeropress

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Video Stabilization with Deshaker in Blender

Action video is often lacking clear persistent references to stabilize video with – they either are not present in the frame for very long, or often compressed out of frame as the codec is trying to spend most of its bandwidth on moving objects in the shot.

Deshaker, a plugin for Windows program VirtualDub, with its capability to find and track multiple visual references (literally hundreds of them) automatically from frame to frame is the king of action video stabilization. (It works on Linux, too, see below).

Deshaker scanning a file

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Beat 500 points gpx track limit using Qmapshack as gpx file editor

Many Garmin devices have a limit of how many points a gpx track might have. You can bypass the limit by splitting a GPS track to segments of 500 points or less. Here is how to do it with a free Qmapshack program:

As an example, I took a 100km ride track from Strawberry Fields Forever ride. (Click on the link, click on 100km, export tab, download as GPX)

Let’s see the complete track on map: In Qmapshack, File-> Load GIS Data, select the gpx file. “Open SFF 100K” folder in Data window and double-click on the track.

qmapshack-shows-gps-track

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