Articles about tutorial | UserComp.com

Efficient Way of Stacking Two Videos Vertically Using FFmpeg

Resolves FFmpeg vertical stacking errors by using vstack instead of hstack and ensuring input videos share identical height and pixel format.

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How to Add a 15-Second Loop Audio/Video to a 40-Second Video Clip

Resolves FFmpeg audio mixing errors and loop duration mismatches when combining a looping background track with foreground audio clips.

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Effortlessly Open Multiple Folders and Tabs with a Batch Script

Clarifies that batch scripts cannot open multiple folders as tabs in a single Explorer window and explains the native limitation.

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Troubleshooting Bluetooth Connection: Failed to Connect with 'org.bluez.Error.Failed br-connection-profile-unavailable'

Resolve the org.bluez.Error.Failed br-connection-profile-unavailable error by installing missing audio modules, restarting the Bluetooth service, and re-pairing the device.

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Fixing BSONVersionError in Node.js: Upgrading BSON to v5.x.x

Resolve BSONVersionError in Node.js by upgrading the BSON library to v5.x.x to match MongoDB driver requirements.

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Downgrading SSL Version from v3.0 to 1.1 in Mac OS (10.14.2) Guide

This article explains why macOS 10.14.2 disables SSLv3 and TLS 1.1 for security reasons and guides users to verify their current TLS version using command-line tools or Safari developer options.

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How to Properly Use Microsoft & Other Tutorials

Prevent configuration errors by verifying environment versions and source credibility before applying vendor tutorials.

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Effortlessly Paste Excel Rows as Word Paragraph Lines, Not a Table

Convert Excel rows to Word paragraphs instead of tables by using the Keep Text Only paste option.

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Effortlessly Refresh Data Every Interval with Live Master Sheet

Automate data refresh intervals in a live master sheet using QUERY to eliminate manual entry errors and ensure real-time dashboard accuracy.

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Adding Logic to Excel Formulae: IF and VLOOKUP Examples

Resolve conditional data retrieval in Excel by combining IF and VLOOKUP to automate dynamic value assignment based on specific criteria.

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How to read just last n items in a json file by c#?

Retrieve the final n records from a JSON file in C# by deserializing to a list and using LINQ Skip.

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How to Record Screen and Two-Way Audio in Online Meetings without Software Restrictions

Resolve missing audio in meeting recordings by routing system and microphone inputs through virtual drivers like VB-Cable, BlackHole, or PipeWire.

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How to Fill Multiple Cells with a Constant Formula in a Tech Support Site: SUM(B26:B200) for a 100-Column Example

Prevents automatic reference shifting when copying a static formula like SUM(B26:B200) across multiple columns in spreadsheets.

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Understanding Ngduong Chi Hien Config: A Comprehensive Guide

Resolve confusion over the non-existent Ngduong Chi Hien Config by identifying actual configuration files and troubleshooting syntax or permission errors.

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How to Duplicate a Pane and Show History in TMUX

Resolve lost scrollback history when duplicating tmux panes by configuring the history limit and using split-window to share the buffer.

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Slide Text Using Drawtext in FFmpeg: A Tech Support Guide

Slide text across video using FFmpeg drawtext filter with time-based expressions for automated scrolling.

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Effortlessly Remove Background Pattern from Excel Cells while Keeping the Background Color

Resolve the issue of losing background color when removing patterns by setting Pattern Style to None in the Format Cells dialog.

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Merging and Transforming Two Arrays: A Tech Support Guide

Demonstrates how to merge and transform two arrays in JavaScript using spread syntax and map, and in Python using list comprehensions.

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One Variable Collect Duplicate Range: Automatically Change Content Based on Selection Cell

Use VBA Worksheet_SelectionChange to automatically update content based on the selected cell since Excel lacks a native feature for this.

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Plotting Number Cases with Excel: A Two-Point Connected Line Visualization

Create a two-point connected line chart in Excel to visually compare differences between two specific data sets or time points.

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How to Change CapCut's Cache Location in Windows

Resolve low C drive space by redirecting CapCut's cache to another drive using a Windows junction.

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How to Create a Simple Line Animation in Microsoft PowerPoint

Solves the problem of creating smooth, professional line animations in PowerPoint using standard shapes and timing adjustments.

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Understanding Summation Values in Mesh Topology using Excel: A Guide

Calculate total bidirectional links in a mesh topology by summing an adjacency matrix and dividing by two to prevent double-counting.

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How to Replace a Password String in Notepad++

Replace all instances of an old password string with a new one in Notepad++ using the Find and Replace dialog.

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Understanding JPAMappings (OneToMany, ManyToOne) in Tech Support

Resolve data integrity errors and performance bottlenecks caused by misconfigured @OneToMany and @ManyToOne JPA entity relationships.

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Consolidating Data from Two Tabs to One in Google Sheets

Merge data from two Google Sheets tabs into one using QUERY and UNION ALL to automatically consolidate rows while excluding duplicate headers.

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Preprocess Smartphone Scan: Undistort Photos of Unfolded Paper Mail Envelope

Corrects perspective distortion and enhances contrast in smartphone scans of unfolded paper mail envelopes to meet official submission requirements.

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Effortlessly Prevent Text Selection in Vue.js for a Seamless User Experience

Prevent accidental text highlighting in Vue.js components to improve interaction flow for draggable elements and custom UI controls.

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Concatenate Videos Using FFmpeg: A Comprehensive Guide

Merge multiple video files into one without re-encoding by ensuring identical codecs and resolutions using FFmpeg's concat demuxer.

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Effortlessly Add Monetary Amounts Column with Formulas in Spreadsheets

Calculate line item totals and grand sums in spreadsheets by multiplying unit price and quantity, then formatting the results as currency.

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How to Install Tools on a Dedicated IP System for Case Study Computers and Science Learning

Install Docker and Jenkins on a dedicated IP system for case study computers and science learning.

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Generate MD5 Hash of Text Files in a Specific Directory: A Batch File Guide

Automate MD5 hash generation for text files in a directory using native Windows certutil and batch scripting.

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How to Create a Configuration File for OpenVPN?

Resolve OpenVPN connection failures by creating a configuration file that correctly references CA, client certificate, and private key files.

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Trying Several Attempts to Copy Selected Data: The Right Way

Resolve incomplete data transfers caused by selecting entire rows or columns instead of specific cell ranges during copy operations.

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Excel: Find & Display Name List in Two Separate Columns

Split a single vertical list of names into two separate columns using INDEX and MOD functions for dynamic, error-free distribution.

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Effortlessly Stop Tracking with Auto-Delete Cookies

Configure browsers to automatically delete cookies on exit to prevent third-party cross-site tracking and protect online privacy.

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