rtnF

rtnF is a diverse Substack covering technological tutorials and insights, including AI applications, data and coordinate conversion, public transportation analysis, server and software management, audio and video processing, programming challenges, and digital security. It often integrates tools for practical solutions, focusing on coding, troubleshooting, and data visualization.

Artificial Intelligence Data Analysis Software Installation and Configuration Digital Security Programming and Coding Challenges Server Management Audio and Video Processing Transportation Analysis Internet Infrastructure Web Analytics

The hottest Substack posts of rtnF

And their main takeaways

Extracting Audio from Video

0 implied HN points • 15 Jun 23
🕹 Technology Audio Video Compression
  1. To extract audio from a video, use the command 'ffmpeg -i input.mp4 -vn -acodec copy output-audio.aac'
  2. After extraction, compress the audio with 'ffmpeg -i input.aac -map 0:a:0 -b:a 96k output.mp3'
  3. The process involves two steps: extraction and compression

Marey Charts

0 implied HN points • 30 Nov 22
  1. Marey charts graphically represent public transportation timetables and speeds
  2. The placement and movement of lines in Marey charts indicate bus units along a route
  3. Intersections of lines in Marey charts show buses occupying the same time-space coordinates

Miraheze disk issues

0 implied HN points • 23 Nov 22
  1. Miraheze is facing disk issues with their SSD storing data.
  2. Data recovery is being attempted, but there's no guarantee of complete success.
  3. It's a good practice to have trust issues with your server's reliability.
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Installing TiddlyWiki on Windows

0 implied HN points • 29 May 22
  1. To install TiddlyWiki on Windows, use webDAV + rclone for a smooth experience.
  2. Download 'rclone' and an empty copy of TiddlyWiki, storing it in a specific directory.
  3. For more convenience, set up autostart on startup using 'nssm.exe' and configuring 'tiddlydaemon'.

Kirim File dari VPS ke Telegram

0 implied HN points • 15 May 22
  1. The method shown involves using curl to send a file from a VPS to Telegram.
  2. You can avoid using SFTP and WinSCP by using this method.
  3. Make sure to replace CID and TOKEN with the appropriate chat group ID and bot token.

CCTV

0 implied HN points • 20 Jan 22
  1. CCTV cables consist of power and data cables connected to a power supply and digital video recorder.
  2. The power supply converts 220V AC to DC 12V to provide power to the camera.
  3. The Digital Video Recorder (DVR) processes CCTV data and can display or store recordings.

Urutkan Berdasarkan Jumlah Kemunculan

0 implied HN points • 20 May 22
  1. Sorting by frequency in Excel can be complicated, try using Python instead.
  2. Copy the column contents to a text file for Python processing.
  3. Follow Python steps for sorting by frequency more easily.

[Leetcode] Merge Intervals

0 implied HN points • 05 Jan 22
  1. Sort the input from smallest to largest first
  2. Start by placing the first block as the solution block
  3. For the remaining blocks, check and merge based on specific conditions

Membuat Autobase Twitter Sendiri

0 implied HN points • 30 May 22
  1. To create your own Twitter autobase, start by setting up a developer account on Twitter and generating access tokens.
  2. Connect your Twitter account to the app using Postman and authorize the app to access your account.
  3. If you encounter errors, try elevating your access level on the Twitter Developer Portal and wait for approval.

EPSG:3857

0 implied HN points • 01 Mar 23
🕹 Technology
  1. EPSG 3857 coordinates are specific and may need conversion for global use.
  2. Converting coordinates may involve searching, scripting, and verification steps.
  3. Verifying converted coordinates using tools like Google Maps can confirm accuracy.

Monitoring Login VPS lewat Telegram

0 implied HN points • 15 May 22
  1. Setup user account for others on VPS.
  2. Create a notification trap using a script.
  3. Configure PAM to execute the notification script.

Yggdrasil on Windows

0 implied HN points • 01 Feb 22
  1. Yggdrasil works on Windows but may not be well tested, so it's best effort only
  2. To get a static IPv6 address on Windows, download and install the Yggdrasil MSI installer, generate and edit a.conf file, and run yggdrasil.exe command
  3. To make a website accessible on the Yggdrasil network, use Yggdrasil for Android, add peers, and connect to access the website

rt-analytics

0 implied HN points • 14 Jan 22
  1. Set up a Telegram bot to track real-time web analytics.
  2. Include frontend script in web pages to send signals to the backend.
  3. Receive detailed visitor information in a Telegram chat, including IP address and User-Agent details.

Make a photo collage without hassle

0 implied HN points • 09 Jun 23
🕹 Technology
  1. Use ImageMagick to create a photo collage without manual hassle
  2. Download and install ImageMagick to easily arrange photos
  3. Customize the command to create a collage and insert it into documents

OpenStreetMap Raster Tile Server : A Long Journey

0 implied HN points • 20 Apr 23
🕹 Technology Maps Web Databases
  1. The post discusses setting up a custom tile server with OpenStreetMap data using own server.
  2. It provides step-by-step instructions to prepare the OS, database, and download, standardize OSM data.
  3. It also guides on configuring the stylesheet, renderer, and miscellaneous tasks for server monitoring.

RAM

0 implied HN points • 18 Dec 21
  1. To check RAM health, use Windows Memory Diagnostic
  2. Different types of RAM such as SODIMM and DIMM are used in laptops and PCs
  3. Understanding the technical specifications like PC3, DDR, and voltage of RAM is important for compatibility

Bootloop

0 implied HN points • 12 Dec 21
  1. Stuck in fastboot, then stuck in bootloop, resolved by removing the battery.
  2. Trying to flash firmware: download MiFlash, driver, ROM - faced error with critical partition flashing.
  3. Device not unlocked, attempted to enter EDL mode to flash firmware, ran into eMMC error - needs replacement or repair.

Hey, I already did that!

0 implied HN points • 27 Nov 21
  1. Understand the algorithm process of assigning minions
  2. Identify the flaw in the algorithm that leads to cycling values
  3. Write a function to find the length of the cycle starting with a given minion ID

Solar Doomsday

0 implied HN points • 27 Nov 21
  1. You must complete a time-limited challenge within 7 days or lose access to the site
  2. To help save Bunny Planet, you need to set up solar panels in squares based on available solar material
  3. Surviving in Lambda's organization requires hard work and promotion to gain necessary security access

Descriptive Statistics with Orange

0 implied HN points • 01 Apr 23
🕹 Technology Data Analysis Statistics
  1. Descriptive statistics with Orange allows for easy data analysis without needing spreadsheet equations or code.
  2. The mean and median provide insight into average building height, helping to understand outlier influence on data.
  3. Understanding dispersion, like the coefficient of variation, reveals how data points spread out relative to the mean.

Cara Install PHP Extension

0 implied HN points • 25 May 22
  1. To install a PHP extension, download the necessary file from pecl.php.net.
  2. Choose the appropriate version and type (Thread Safe) for your PHP and Windows bit version.
  3. After copying the file to the right directory and updating php.ini, remember to restart Apache.