DalVideo User Manual

DalVideo — Screen recording software by DALBIT Version 1.0.0 | Windows 10/11 | © 2026 DALBIT

Glossary (Read This First)

Don’t worry if you’re not familiar with video terminology. Just read through the terms below and the rest of this manual will be easy to follow.

Term	Meaning	Everyday Analogy
Resolution	The number of dots (pixels) that make up the screen. 1920×1080 means 1,920 dots across and 1,080 dots down.	Mosaic tile count. The more tiles, the sharper the picture.
FPS (Frames Per Second)	The number of still images (frames) shown per second. 30fps = 30 images per second.	How fast you flip through a flipbook. The faster you flip, the smoother the motion.
Codec	Technology that compresses and decompresses video. Examples include H.264, H.265, and AV1.	How you pack luggage. The same items take up different space depending on the packing method.
H.264	The most widely used codec. Plays on virtually every device.	Standard shipping — deliverable anywhere.
H.265 (HEVC)	30–50% smaller files than H.264. Requires a relatively modern GPU.	Vacuum packing — same contents, less bulk.
AV1	The newest codec. About 50% smaller files than H.264. Requires a recent GPU such as NVIDIA RTX 40 series or newer.	Cutting-edge compression — smallest size, but needs the latest equipment.
Container	A file format that bundles video, audio, and subtitles together. Examples: MP4, MKV.	A lunchbox. Rice, side dishes, and utensils all packed in one box.
MP4	The most universal container. Playable everywhere.	A standard lunchbox — opens anywhere.
MKV	A crash-safe container. The file survives even if the recording is forcefully terminated.	A rugged insulated lunchbox — contents stay safe even if you drop it.
Bitrate	The amount of data used per second. Higher bitrate means better quality but larger files.	Amount of paint. More paint gives a sharper picture, but you run through it faster.
Encoding	The process of compressing video with a codec.	The actual act of packing the luggage.
Hardware Acceleration (HW Accel)	Encoding using the GPU (graphics card). Much faster and lighter than CPU encoding.	Packing by hand vs. packing by machine — the machine is far faster.
Keyframe	A point in the video where a “complete frame” is stored. Cutting at a keyframe avoids quality loss.	A table of contents. Splitting a book at a chapter boundary keeps things clean.
Freemium	A free + paid model. DalVideo lets you use every feature for free; the only limit is a 5-minute recording time.	A tasting counter. You can sample everything, but portion sizes are limited.
WASAPI	Windows audio capture technology. Records system sound in high quality.	A recorder plugged directly into the speaker.
CRF	A quality value for constant-quality encoding. Lower values mean higher quality (and larger files).	Photo print quality grade. The lower the number, the sharper the print.
DXGI	Windows screen capture technology. Grabs the screen directly from the GPU, so CPU load is minimal.	Photocopying the screen directly.
PiP (Picture-in-Picture)	A small screen within the screen. Displays webcam footage in a corner of the recording.	A small TV inside a TV.
RNNoise	AI-powered real-time noise removal technology. Automatically removes background noise from the microphone.	A noise-cancelling microphone.
Whisper	AI speech recognition created by OpenAI. Converts speech to subtitles. Works entirely offline.	An AI stenographer.

1. Getting Started

1.1 Installation

DalVideo is distributed as an NSIS installer (.exe).

Run the DalVideo_Setup.exe file
Follow the installation wizard
Default installation path: C:\Program Files\DalVideo\
After installation, launch the app from the desktop icon or the Start menu

Installation size is approximately 25 MB, and no additional runtime installation is required.

1.2 First Launch Overview

When you launch DalVideo for the first time, the main screen appears. It is divided into three main sections:

Top: Real-time screen preview
Middle: Capture mode, monitor, and shortcut panels
Bottom: Audio level meters, record button, and status bar

You can start using the app immediately — no login or sign-up required.

1.3 Free vs. Paid (Freemium Model)

DalVideo uses a Freemium model.

	Free	Pro
Recording time limit	5 minutes	Unlimited
Watermark	None	None
Resolution limit	None (4K available)	None
Codec limit	None (AV1 included)	None
Feature restrictions	None	None
AI features	All available	All available
Ads / bundleware	None	None

The only difference is the 5-minute recording time limit. The free version provides access to every feature.

To upgrade to Pro, go to Settings → General tab and click the “Upgrade to Pro” button.

2. Understanding the Main Screen

The default main screen size is 900×840, and it can be resized down to a minimum of 600×640.

2.1 Title Bar

The horizontal bar at the very top of the screen.

Left side: DalVideo logo + version number (“1.0”) + license badge (“FREE” or “PRO”)
Right-side buttons:
- 📋 Open Editor — Opens the built-in editor
- ⚙️ Settings — Configure recording, audio, shortcuts, and more
- ℹ️ About — View app information and license status
- 🌙 Toggle Theme — Switch between light and dark themes
Window controls: Minimize, Maximize/Restore, Close

2.2 Preview Area

The large area below the title bar, taking up roughly half the screen. It shows a real-time preview of the currently selected capture target (full screen, region, or window). This lets you verify what will be recorded before you start.

The preview refreshes 10 times per second (when not recording).

After a recording ends, this area displays the completion panel (see Section 4.6).

2.3 Capture Mode Panel

Located on the left side (about 40%) below the preview. Choose from three capture modes:

Full Screen: Records the entire monitor
Region: Drag to select a rectangular area of the screen
Window: Select a specific application window

Below the mode selection, the current resolution (e.g., “1920×1080”) is displayed so you can see the recording dimensions at a glance.

2.4 Monitor Selection Panel

Located to the right (about 20%) of the capture mode panel. Only visible in Full Screen mode.

If you have two or more monitors, each monitor’s position, resolution, and HDMI port information are displayed visually, allowing you to click the desired monitor to select it.

2.5 Shortcut Reference Panel

Located on the right side (about 40%). Shows the 7 most commonly used shortcuts.

Displayed in “Action | Key Combination” format, so you can quickly look up essential controls during recording.

2.6 Audio Level Meters

Two horizontal bars located above the record button:

System Audio (🔊 speaker icon + “System”): Shows the real-time volume of sound coming from the computer
Microphone (🎤 microphone icon + “Mic”): Shows the real-time volume of sound coming through the microphone

Each meter has a 0–100% bar with a peak indicator line. If the audio is too loud and clips, the bar turns red.

2.7 Recording Status Display

Information shown while recording:

Status icon: Green dot + “REC” when recording, “PAUSED” when paused
Elapsed time: “00:00:00” format (hours:minutes:seconds)
Remaining time (free version only): ”⏳ 4:35 remaining” — time left until the 5-minute limit
Time limit warning: When less than 1 minute remains, a red semi-transparent warning bar flashes

2.8 Record Button

The large, round, red button at the bottom center of the screen.

Idle: “REC” — with “Start Recording (F9)” tooltip
Recording: “STOP” — with “Stop Recording (F9)” tooltip

Click the button or press the default shortcut Ctrl+Shift+R to start or stop recording.

2.9 Status Bar

The information bar at the very bottom of the screen. From left to right:

⏱ Elapsed time: “00:00:00”
💾 File size: “256 MB” (updates in real time during recording)
▶ Frame rate: “60 fps” (actual recording FPS)
📁 Output folder: “C:\Videos” — click to open the folder in File Explorer

3. Capture Modes in Detail

3.1 Full Screen Mode

What is it: Records the entire screen of the selected monitor.

Why use it: Ideal when you need to show the entire screen, such as for games or presentations.

How to use it:

Select “Full Screen” in the capture mode panel
If you have two or more monitors, click the desired monitor in the monitor selection panel
Verify the selected screen appears in the preview area
Press the record button

Dual monitor tip: The monitor selection panel shows each monitor’s position and resolution. Click the one you want and only that monitor will be recorded.

3.2 Region Selection Mode

What is it: Select a rectangular portion of the screen to record only that area.

Why use it: Useful when you want to show only part of the screen (e.g., a specific program, or to exclude personal information).

How to use it:

Select “Region” in the capture mode panel
When the crosshair appears, drag the mouse to select the desired area
The dimensions of the selected area (e.g., “1280×720”) are shown in real time
The area outside the selection is dimmed, and the selection is outlined with a red dashed border (2px)

Useful controls:

Hold Shift while dragging: Locks the aspect ratio to 16:9 (ideal for YouTube, etc.)
ESC key: Cancels the region selection
You must drag at least 10px for the region to be recognized

3.3 Window Selection Mode

What is it: Pick one open application window and record only that window.

Why use it: Convenient when you want to record a specific program. The recording follows the window even if you move or resize it.

How to use it:

Select “Window” in the capture mode panel
Choose the desired window from the dropdown list
- Each entry shows the window icon + window title + program name (e.g., “firefox.exe”)
Press the 🔄 refresh button to include newly opened windows in the list

4. Your First Recording (Step-by-Step Guide)

4.1 Choose a Capture Mode

Launch DalVideo
Select the desired mode in the capture mode panel:
- Full Screen — entire monitor
- Region — only a specific area
- Window — only a specific program
Check the preview area to confirm what will be recorded

4.2 Check Audio

Look at the audio level meters
System Audio: If you hear sound from the computer, the bar should be moving
Microphone: If you speak, the bar should be moving
If a bar is not moving, go to Settings (⚙️) → Audio tab and verify the device selection

4.3 Start Recording

Start recording using one of the following:

Click the red REC button on screen
Press Ctrl+Shift+R on the keyboard

Once recording starts:

The DalVideo window automatically minimizes to the system tray (next to the clock in the lower-right corner of the screen)
A red dot icon appears in the tray
Startup delay is approximately 100ms, so recording begins almost instantly

4.4 Controls During Recording

While recording, you can use shortcuts for various controls:

Action	Default Shortcut	Description
Pause/Resume	`Ctrl+Shift+P`	Pauses and resumes recording. The gap during the pause is automatically removed.
Screenshot	`Ctrl+Shift+S`	Saves the current screen as a PNG image. Recording is not interrupted.
Mute Microphone	`Ctrl+Shift+M`	Toggles the microphone on or off. System audio continues to record.
Drawing Mode	`Ctrl+Shift+D`	Draw directly on the screen (see Section 7.1).
Keystroke Display	`Ctrl+Shift+K`	Shows keyboard input on screen (see Section 7.2).
Webcam Display	`Ctrl+Shift+W`	Shows webcam footage in a small corner overlay (see Section 7.3).

You can also pause/resume/stop via the right-click menu on the tray icon.

4.5 Stop Recording

Stop recording using one of the following:

Press Ctrl+Shift+R on the keyboard
Right-click the tray icon → select “Stop”

For free users, recording automatically stops at 5 minutes. A red warning appears starting at the 4-minute mark (1 minute remaining).

When recording ends, the DalVideo window reappears and the completion panel is displayed.

4.6 Completion Panel

A panel displayed in the preview area after recording ends:

Information shown:

”✅ Recording Complete!”
Recording duration (e.g., “03:42”)
File size (e.g., “128 MB”)

Buttons:

▶ Play — Plays the recorded video in the default media player
✂ Edit — Opens the video in DalVideo’s built-in editor
📁 Open Folder — Opens the save folder in File Explorer

DALBIT Integration (Quick Actions):

Trim with DalCut — Opens the video in DalCut if it is installed
Copy path to clipboard — Copies the file path
Apps that are not installed appear dimmed (40% opacity) with a “Not installed” tooltip

5. Settings in Detail

Click the ⚙️ button in the title bar to open the settings window (720×560). There are 5 tabs in the left sidebar.

5.1 General Tab (⚙️)

License Status

The current license status is shown at the top of the screen.

Free users: “Free” badge + “Upgrade to Pro” button + “Activate License” button
Pro users: “Pro” badge + “Deactivate” button

Language Selection

DalVideo supports 9 languages:

Option	Description
Auto (System)	Automatically follows the operating system language (default)
한국어	Korean
English	English
日本語	Japanese
Español	Spanish
Français	French
العربية	Arabic
中文	Chinese
Deutsch	German

Output Folder

The folder where recordings are saved.

Default: C:\Users\{username}\Videos
Use the 📂 Browse button to select a different folder

File Name Pattern

The format for saved file names.

Default: DalVideo_{DateTime}
Available tokens: {DateTime}, {Date}, {Time}
Example: DalVideo_{DateTime} → DalVideo_2026-02-23_143022.mp4

Container Format

Format	Characteristics	When to choose?
MP4 (default)	Fast and universal. Playable everywhere	General recording
MKV	Crash-safe mode. File is preserved even if recording is forcefully terminated	Long recordings, unstable environments

5.2 Recording Tab (📹)

Presets (6 types)

Pre-configured recording quality combinations. Clicking a button automatically adjusts the settings below.

Preset	Resolution	FPS	Codec	Use Case
Default	Original	30	H.264	General screen recording
Game	Original	60	H.264	Game recording (smooth motion)
Lecture	1080p	24	H.264	Long lecture recordings (small files)
High Quality	4K	60	H.265	Maximum quality (large files)
Minimal Size	1080p	30	AV1	Saving storage space
Custom	Manual	Manual	Manual	Set every value as desired

Preset selection tip: If you’re unsure, use “Default.” It works well for most situations.

Codec Selection (editable only in Custom preset)

Codec	File Size	Compatibility	Required GPU
H.264 (default)	Average	All devices	All GPUs
H.265	30–50% smaller than H.264	Most devices	NVIDIA RTX 20+, AMD RX 5000+, Intel HD+
AV1	~50% smaller than H.264	Latest devices	NVIDIA RTX 40+, AMD RX 7000+, Intel Arc+

⚠️ When selecting H.265/AV1, a GPU support warning is displayed. If your GPU does not support the chosen codec, it automatically falls back to a lower codec (AV1 → H.265 → H.264).

Frame Rate (editable only in Custom preset)

FPS	Use Case	File Size Impact
24	Cinematic style, long lectures	Smallest
30 (default)	General screen recording	Average
60	Gaming, smooth motion	~2× larger
120	Ultra-smooth motion (requires 4K-capable GPU)	~4× larger

Encoder Speed (editable only in Custom preset)

Setting	Encoding Speed	File Size
Fast	Fast (low latency)	Larger
Medium (Balanced) (default)	Moderate	Average
Quality	Slow	Smallest

Resolution (editable only in Custom preset)

Setting	Resolution	Use Case
Original (default)	Native capture size	Maximum sharpness
1080p	1920×1080	Full HD standard
720p	1280×720	Mobile viewing
480p	854×480	Ultra-small files

Cursor and Click Effects

☑ Show mouse cursor (default: on) — The mouse pointer appears in the recording
☑ Show click effects (default: off) — A ripple effect appears on mouse clicks
- Left click: Red ripple
- Right click: Blue ripple

5.3 Audio Tab (🔊)

System Audio (Computer Sound)

☑ Record system audio (default: on)
Device selection: Choose an output device from the dropdown (speakers, headphones, etc.)
🔄 Refresh button: Updates the list when a new device is connected
System volume slider:
- Range: 0.5× to 4.0× (0.5 increments)
- Default: 1.0× (original volume)
- Disabled when system audio is turned off
- Example: 2.0× = recorded at twice the original volume

Microphone

☑ Record microphone (default: on, auto-detected when a microphone is connected)
Device selection: Choose an input device from the dropdown
Microphone volume slider:
- Range: 0.5× to 4.0× (0.5 increments)
- Default: 2.0× (microphones are typically quiet, so a default boost is applied)
- Disabled when microphone is turned off

Audio Bitrate

Bitrate	Sound Quality	File Size Impact
128 kbps	Standard (radio quality)	Smallest
192 kbps (default)	Good (CD quality)	Average
256 kbps	Very good	Slightly larger
320 kbps	Best	Largest

For general recording, 192 kbps is sufficient. Choose 256–320 kbps if music or high-quality audio is important.

5.4 Shortcuts Tab (⌨️)

All 10 shortcuts can be freely customized.

How to change a shortcut:

Click the shortcut button next to the action you want to change
A “Press a key…” message appears
Press the desired key combination (e.g., Ctrl+F1)
If the key combination is already in use, a conflict warning is shown and the change is blocked

Use the “Reset to Defaults” button to restore all shortcuts to their default values.

See Section 10 for the full list of default shortcuts.

5.5 AI/Advanced Tab (🤖)

AI Subtitle Model (Whisper)

Select the AI model for automatic subtitle generation. The model runs locally (on your computer), so no internet connection is required.

Model	Size	Speed	Accuracy
Tiny	75 MB	Fastest	Fair
Base	142 MB	Fast	Good
Small ⭐ (recommended)	466 MB	Moderate	Very good

Use the “Manage Models…” button to download and manage models
Model storage location: %APPDATA%/DALBIT/DalVideo/models/

AI Noise Removal (RNNoise)

☑ Noise removal (default: off) — Uses AI to remove background noise from the microphone in real time
Reduces keyboard clatter, air conditioner hum, fan noise, etc.
Applied in real time during recording (not post-processing)
Microphone recording must be enabled for this feature to work

Smart Trim Defaults

Default settings for the editor’s smart trim (silence detection) feature.

Silence detection threshold:
- Range: -60 dB (detects very quiet sounds) to -20 dB (detects only loud sounds)
- Default: -40 dB
- Adjustable in 5 dB increments
Minimum silence duration:
- Range: 0.5 seconds to 10 seconds
- Default: 2.0 seconds
- Adjustable in 0.5-second increments
- Silences shorter than this are ignored

Auto Zoom Defaults

☑ Record click events during recording (default: off) — Saves mouse click positions. Used for the auto zoom effect in the editor.
Default zoom level:
- Range: 1.5× to 4.0×
- Default: 2.0×
- Adjustable in 0.5× increments
Default animation speed:
- Range: 0.5× to 3.0×
- Default: 1.0×
- Adjustable in 0.5× increments
- Higher values apply the zoom effect more quickly

6. Recording Preset Guide

A detailed explanation of each preset’s characteristics and recommended use cases.

6.1 Default

Settings: Original resolution, 30fps, H.264
Use case: General screen recording, work videos, software demos
Characteristics: Plays well everywhere with a reasonable file size. Recommended if you’re using DalVideo for the first time.
Estimated file size for 1 hour of recording: ~1–2 GB (at 1080p)

6.2 Game

Settings: Original resolution, 60fps, H.264
Use case: Gameplay recording, content with fast-paced motion
Characteristics: Captures smooth motion at 60fps. File size is approximately twice that of the Default preset.
Estimated file size for 1 hour of recording: ~2–4 GB (at 1080p)

6.3 Lecture

Settings: 1080p, 24fps, H.264
Use case: Lectures, presentations, tutorials, and other long videos with minimal screen movement
Characteristics: Minimizes file size at 24fps. For lectures with little screen change, 24fps is more than sufficient.
Estimated file size for 1 hour of recording: ~0.5–1 GB

6.4 High Quality

Settings: 4K (3840×2160), 60fps, H.265
Use case: Professional content requiring the best quality, YouTube 4K uploads
Characteristics: The sharpest and smoothest option, but file sizes are very large and a GPU that supports H.265 is required.
Estimated file size for 1 hour of recording: ~8–15 GB

6.5 Minimal Size

Settings: 1080p, 30fps, AV1
Use case: When storage space is limited or you need to share files
Characteristics: Uses the AV1 codec to produce the smallest possible files. Requires a recent GPU that supports AV1 (NVIDIA RTX 40+, AMD RX 7000+).
Estimated file size for 1 hour of recording: ~0.5–1 GB

6.6 Custom

Settings: All values set manually
Use case: When none of the presets above meet your needs, or you have specific requirements
You can individually adjust the codec, FPS, encoder speed, and resolution

7. Overlay Features

Features that display additional elements on top of the screen during recording.

7.1 Drawing Overlay

What is it: Draw directly on the screen during recording. Useful for marking areas you want to highlight.

Why use it: Convenient for pointing to or annotating specific areas in tutorials and lectures.

How to use it:

Press Ctrl+Shift+D during recording
A floating toolbar appears on screen (draggable)
Select a tool and draw on the screen
Press ESC to exit drawing mode

Drawing tools (6 types):

Tool	Description
Pen	Draw freehand lines
Highlighter	Apply a semi-transparent highlight
Arrow	Draw directional arrows
Rectangle	Draw an outlined rectangle
Circle	Draw an outlined circle
Text	Type text at the clicked position

Settings:

Color palette: Red, Green, Blue, Yellow, Orange, Purple, Black, White (8 colors)
Thickness: 1px, 2px, 4px, 6px, 8px (5 levels)
Undo: Undoes the last drawing
Clear all: Erases all drawings at once

7.2 Keystroke Display

What is it: Displays the key combinations you press at the bottom center of the screen.

Why use it: Useful for showing viewers which keys you are pressing during tutorials and lectures.

How to use it:

Press Ctrl+Shift+K during recording
Each subsequent keypress is displayed at the bottom of the screen
- Examples: “Ctrl+C”, “Shift+Enter”, “Alt+Tab”
Press Ctrl+Shift+K again to turn it off

Display behavior:

Bottom center of the screen, semi-transparent black background
24pt text size
Each keystroke is displayed for 2 seconds before fading out
Appearance: 150ms fade-in; disappearance: 300ms fade-out
Up to 10 keystrokes can be displayed simultaneously

7.3 Webcam PiP (Picture-in-Picture)

What is it: Displays webcam footage as a small overlay in a corner of the recording.

Why use it: Use it when you want to show your face alongside the screen recording (e.g., lectures, game streams).

How to use it:

Press Ctrl+Shift+W during recording
The webcam feed appears in a corner of the screen
Press Ctrl+Shift+W again to turn it off

Repositioning: Drag freely to move, or right-click → “Change Position” menu to choose one of four corners (top-left, top-right, bottom-left, bottom-right).

Size options (right-click menu):

Size	Pixels
Small	160×120
Medium (default)	240×180
Large	320×240

Shape options (right-click menu):

Rectangle (default)
Circle — applies a circular mask

8. Built-in Editor

Open the editor by clicking ✂ “Edit” in the completion panel or the 📋 button in the title bar.

The editor window size is 900×720 and is resizable.

8.1 Editor Layout

Top: Toolbar (Trim, Split, Delete, Undo, Redo, Export)
Middle: Video preview + current time / total time display
Bottom: Timeline (time ruler, video track, playhead)
Very bottom: Status bar (shows operation results)

8.2 Using the Timeline

The timeline is a bar that visually represents the flow of the video.

Time ruler: Shows time markers at the top in the format 0:00, 0:05, 0:10…
Playhead: A vertical line indicating the current position. Drag it to navigate to any point.
Trim handles: Draggable handles at both ends. Adjust the start and end points.
Zoom controls: Zoom in (🔍+) / Zoom out (🔍−) / Fit (FIT) buttons to adjust the timeline scale.

8.3 Trim

Trims the beginning or end of the video.

Drag the start handle (left) on the timeline to set the start point
Drag the end handle (right) to set the end point
Click the ✂ “Trim” button in the toolbar
Only the selected range is kept; the rest is removed

Trimming is performed losslessly (without re-encoding) and is very fast (approximately 30 seconds for a 10-minute video).

8.4 Split

Splits the video into two parts at a specific point.

Move the playhead to where you want to split
Click the 🔀 “Split” button or press the S key
The video is divided into two parts at that point

8.5 Delete

Removes a section of the video.

Use the handles to select the range to delete
Click the 🗑 “Delete” button
The selected section is removed and the remaining parts are automatically joined

8.6 Undo / Redo

Undo: Ctrl+Z or the ↶ button
Redo: Ctrl+Y or the ↷ button

8.7 AI Subtitles (Editor)

Recognizes speech in the recorded video and automatically generates subtitles.

Launch the AI subtitle generation feature in the editor
The Whisper model selected in settings analyzes the audio (takes 5–60 seconds)
Subtitle blocks appear on the timeline
Click each subtitle to edit its text
You can also drag to adjust each subtitle’s start and end times

8.8 Subtitle Burn-in

Burns the generated subtitles directly into the video for export. Subtitles are always visible without needing a separate subtitle file.

8.9 Export

Saves the edited video as a file.

Click the 💾 “Export” button
Choose options in the export dialog:
- Lossless: Saves quickly without re-encoding (1–2 minutes)
- Reencode: Choose codec and quality (slower, but file size can be controlled)
Quality presets when re-encoding:
- Fast: Quick encoding, larger file
- Balanced: A balanced setting
- Quality: Slow encoding, best compression
Select the save location and click “Export”

9. AI Features in Detail

All AI features run locally on your computer. No internet connection is required, and no data is sent externally.

9.1 AI Subtitle Generation (Whisper)

What is it: Recognizes speech in the video and automatically generates subtitles.

Why use it: Saves you the time of manually typing subtitles. Especially useful for lectures and tutorials.

How to use it:

First, download an AI model: Settings → AI tab → “Manage Models…”
Select a model (recommended: Small ⭐)
Make a recording (system audio must be enabled)
Launch subtitle generation in the editor
Once analysis is complete, subtitles appear on the timeline

Model characteristics:

Tiny (75 MB): Fastest but lowest accuracy. Good for quick previews.
Base (142 MB): A balance of speed and accuracy.
Small (466 MB): Most accurate. Recommended for final subtitles.

Offline operation: Once downloaded, the model works without an internet connection.

9.2 AI Noise Removal (RNNoise)

What is it: Uses AI to remove background noise (keyboard clatter, air conditioner hum, fan noise, etc.) from the microphone in real time.

Why use it: Record clean audio even in noisy environments.

How to use it:

Settings → AI tab → check “Noise removal”
Microphone recording must be enabled
Start recording and noise is automatically removed

Important: This feature is applied in real time during recording. Since noise is removed at the recording stage rather than in post-processing, the original noise is not included in the recording file.

9.3 Smart Trim (Silence Detection)

What is it: Automatically finds silent sections (no speech) in the video.

Why use it: Quickly locate and remove “um…“s, long pauses, and other silences in lectures and presentations.

How to use it:

Launch the smart trim feature in the editor
Silent sections are highlighted on the timeline as orange/red blocks
You can drag the boundaries of each block to adjust them
Delete individual or all silent sections

Settings (Settings → AI tab):

Threshold: -60 dB (sensitive) to -20 dB (insensitive). Default: -40 dB
Minimum duration: 0.5 seconds to 10 seconds. Default: 2.0 seconds

9.4 Auto Zoom (Click Tracking)

What is it: Records mouse click positions during recording and adds automatic zoom effects to those positions during editing.

Why use it: Automatically highlights clicked areas in tutorials and software demos. Eliminates the hassle of manually adding zoom effects.

How to use it:

Before recording: Settings → AI tab → check “Record click events during recording”
Make a recording (click positions are automatically recorded)
Click events appear on the auto zoom track in the editor
Press the “Apply” button to apply zoom effects

Zoom settings (Settings → AI tab):

Zoom level: 1.5× to 4.0× (default: 2.0×)
Animation speed: 0.5× to 3.0× (default: 1.0×)

10. Complete Shortcut List

Recording

Action	Default Shortcut
Start/Stop Recording	`Ctrl+Shift+R`
Pause/Resume	`Ctrl+Shift+P`
Mute Microphone	`Ctrl+Shift+M`
Screenshot	`Ctrl+Shift+S`
Drawing Mode	`Ctrl+Shift+D`
Keystroke Display	`Ctrl+Shift+K`
Webcam PiP	`Ctrl+Shift+W`
Full Screen Recording	`Ctrl+Shift+Q`
Region Recording	`Ctrl+Shift+A`
Window Recording	`Ctrl+Shift+Z`

Editor

Action	Default Shortcut
Undo	`Ctrl+Z`
Redo	`Ctrl+Y`
Split	`S`
Play/Pause	`Space`

Zoom During Recording

Action	Control
Zoom In/Out	`Ctrl+Mouse Wheel`
Zoom Levels	1× → 2× → 4×
Reset Zoom	`ESC` or return to 1×

All shortcuts can be changed in Settings → Shortcuts tab.

11. System Tray

When recording starts, the DalVideo window minimizes and an icon appears in the system tray (next to the clock in the lower-right corner of the screen).

Icon: Red dot while recording
Tooltip: Hovering over the icon shows “DalVideo - Recording”
Right-click menu:
- Pause/Resume
- Stop Recording
- Exit App

12. Theme Switching

Click the 🌙 button in the title bar to toggle between light theme and dark theme.

Dark theme: Reduces eye strain (default)
Light theme: Better readability in bright environments

13. Multi-Language Support

DalVideo supports 8 languages + automatic system detection:

English, 한국어, 日本語, 中文, Español, Français, العربية, Deutsch

How to change: Settings → General tab → select from the Language dropdown

Selecting “Auto (System)” will automatically follow the operating system’s language setting.

14. Automatic Updates

DalVideo automatically checks for updates 3 seconds after launch.

Updates are distributed through GitHub Releases
A notification appears when an update is available
You can apply the update whenever you choose
The automatic update check runs quietly in the background

15. License Management

Upgrading from Free to Pro

Go to Settings (⚙️) → General tab → click “Upgrade to Pro”
A Paddle checkout page opens in your browser
After payment, you receive a license key
Go to Settings → General tab → click “Activate License”
Enter the license key
Activation complete: the “PRO” badge is displayed

Deactivating a License

When moving to another computer or resetting:

Go to Settings → General tab → click “Deactivate”
Confirm, and the license is deactivated
You can re-activate the same key on another computer

16. Troubleshooting (FAQ)

Recording won’t start

Check the output folder: Go to Settings → General tab and verify the output folder exists and is writable
Check the codec: Go to Settings → Recording tab and verify your GPU supports the selected codec. If unsure, select H.264
Restart the app: Try restarting the app after changing settings

Audio is not being recorded

Go to Settings → Audio tab and check that “Record system audio” or “Record microphone” is enabled
Verify the correct device is selected in the device dropdown
Press the 🔄 refresh button to update the device list
Check whether the audio level meters are moving

Video and audio are out of sync

In most cases, sync is automatically corrected within 30 seconds of the recording start
If the issue persists, try restarting the recording
Target sync error: 20ms or less

CPU usage is too high

Use hardware encoding: Go to Settings → Recording → set codec to H.264 (leverages GPU encoding)
Lower the FPS: Change 60fps → 30fps
Lower the resolution: Change 4K → 1080p
With hardware acceleration, the target CPU usage is approximately 3% or less at 1080p/60fps

File size is too large

Use the AV1 codec: Produces the smallest files if your GPU supports it
Use the Lecture preset: Minimizes file size at 24fps + 1080p
Re-encode in the editor: Editor → Export → Reencode → Quality preset for post-processing

Webcam is not showing

Go to Windows Settings → Privacy → Camera and allow DalVideo to access the camera
Make sure no other program is currently using the camera
Restart the app

AI subtitles are not being generated

Go to Settings → AI tab and verify a model has been downloaded
Check that “Record system audio” is enabled
Whisper model processing takes 5–60 seconds — please wait a moment

Recording was forcefully terminated

If using MKV format: The file is preserved
If using MP4 format: A recovery prompt appears on next launch
- Recovery path: %LOCALAPPDATA%/DALBIT/DalVideo/recovery/
- Up to 30 seconds of recording before the crash can be recovered

Tip: For long recordings, use the MKV format to keep files safe even if the system crashes.

How to reset settings

Delete the settings file and restart the app to restore all settings to their defaults:

Settings file location: %APPDATA%/DALBIT/DalVideo/settings.json

System Requirements

Minimum

Component	Requirement
Operating System	Windows 10 v1909 or later
RAM	8 GB
Disk Space	5 GB or more
CPU	Intel Core i5 8th Gen / AMD Ryzen 5 2600 or better

Component	Requirement
Operating System	Windows 11 Pro
RAM	16 GB
Disk Space	20 GB SSD
GPU	NVIDIA RTX 2060+ / AMD RX 5500+ / Intel Arc A380+
Network	For automatic update checks

Additional Requirements for AI Features

Component	Requirement
Additional Disk Space	500 MB (for AI model storage)
Recommended Model	Small (466 MB)

Need help? If this manual doesn’t resolve your issue, you can get support from the official DALBIT website.

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