DalCut User Manual

DalCut — DALBIT’s video trimming/merging program Version 1.0.0 | Windows 10/11 | $19.99 (lifetime license) | © 2026 DALBIT

Glossary (Read First)

It’s perfectly fine if you’re new to video editing. Reading the terms below first will help you understand this manual easily.

Term	Meaning	Everyday Analogy
Lossless Trim	A method of cutting video without any quality loss, preserving the original data as-is. Fast and no quality degradation.	Cutting paper with scissors. The text and images on the cut pieces remain unchanged.
Remux	Changing only the container (packaging) while keeping the video/audio data intact. Lossless and very fast.	Swapping the lunchbox but keeping the food the same.
Encoding	The process of converting (compressing) video with a specific codec. Takes time but allows you to control file size and compatibility.	Cooking a new meal. It takes time, but you can make it taste the way you want.
Keyframe	A point in the video where a “complete frame” is stored. Typically one every 2-5 seconds. Cutting at these points results in no quality loss.	The first page of a chapter in a book. Dividing by chapters keeps things clean.
Codec	Technology that compresses and decompresses video. Examples include H.264, H.265, AV1, etc.	A packing method. Different methods result in different sizes and compatibility.
H.264	The most widely used codec. Plays on virtually all devices.	Standard shipping packaging — accepted everywhere.
H.265 (HEVC)	30-50% smaller files than H.264. Requires a relatively modern GPU.	Vacuum packing — reduces the volume.
AV1	The latest codec. About 50% smaller than H.264. Requires a modern GPU.	The latest compression technology.
Container	A file format that bundles video, audio, and subtitles together. MP4, MKV, etc.	A lunchbox. It holds the rice, side dishes, and utensils all in one container.
Scene Detection	A feature where AI automatically finds points in the video where the screen changes significantly (scene transitions).	Automatically marking the moments when scenes change in a movie.
Silence Detection	A feature that automatically finds sections in the video where there is no sound or very quiet sound.	Automatically marking the “break times” in a lecture recording.
Decibel (dB)	A unit for measuring sound level. 0 dB is the loudest, and -60 dB is nearly inaudible.	The numbers on a volume dial. The smaller the number, the quieter it is.
Batch Processing	A feature that processes multiple files sequentially at once.	Putting several loads of laundry into the washing machine and running them all at once.
CRF	A quality value for encoding that maintains consistent visual quality. Lower values mean higher quality (larger files).	Photo print quality grades. The lower the number, the sharper the result.
Segment	A single selected range on the timeline. You can create multiple segments and extract them all at once.	Marked sections on a long loaf of bread where you plan to cut.
HW Accel (Hardware Acceleration)	Encoding using the GPU (graphics card). Much faster than CPU encoding.	Packing by hand vs. packing by machine.
Frame	A single still image that makes up a video.	A single panel in a comic book.
Snap	A feature that magnetically aligns to markers, keyframes, or other points during editing.	A magnetic ruler.

1. Getting Started

1.1 Installation

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

Run the DalCut_Setup.exe file
Follow the installation wizard instructions
Default installation path: C:\Program Files\DalCut\
Once installation is complete, you can launch DalCut from the desktop icon or Start menu

The installation size is approximately 22MB. A File Explorer right-click menu entry is also automatically registered during installation.

1.2 First Launch Screen

When you first launch DalCut, a dark-themed main screen appears. The screen is divided into four main sections:

Top: Toolbar (File open, Edit, Segments, AI, Batch, etc.)
Middle: Video preview area + playback controls
Bottom: Timeline (time ruler, thumbnails, trim handles)
Very bottom: Status bar (current operation status)

Before opening a video, the preview area displays a film icon and “Preview” text.

1.3 Free vs Paid (5-Minute Output Limit Only)

DalCut uses a Freemium model.

	Free	Pro
Output time limit	5 minutes	Unlimited
Watermark	None	None
Resolution limit	None	None
Codec limit	None (incl. AV1)	None
Feature limit	None	None
AI features	Fully available	Fully available
Batch processing	Available	Available
Ads	None	None
Price	Free	$19.99 (lifetime)

The only difference is the 5-minute limit on export (output) duration. The free version has access to all the same features.

This is a limit on the “output result length,” not “recording time.” You can open and edit a 1-hour video, but if the export result exceeds 5 minutes, a paid upgrade is required.

When DalCut is installed, a right-click menu entry is added to File Explorer for video files: “Open with DalCut”.

Supported extensions: .mp4, .mkv, .avi, .mov, .webm, .ts, .flv, .m3u8, .3gp, .mj2

Clicking this menu option opens the video directly in DalCut.

2. Understanding the Main Screen

The main screen has a default size of 1000x700, and supports resizing and Windows Snap layouts.

2.1 Title Bar

The horizontal bar at the very top of the screen (height 32px).

Left: DalCut app icon + “DalCut” text + license badge (“Free” or “Pro”)
Right: Minimize, Maximize/Restore, Close buttons
Drag the title bar to move the window

The row of buttons located directly below the title bar (height 40px). It is divided into 6 sections:

File Section

Button	Shortcut	Description
Open	`Ctrl+O`	Opens a video file

Edit Section

Button	Shortcut	Description
Lossless Trim	`Ctrl+S`	Saves the selected range losslessly
Export	`Ctrl+E`	Exports with codec/quality options

Edit buttons are disabled (grayed out) before a video is opened.

Segment Section

Button	Shortcut	Description
Add Segment	`Ctrl+Shift+A`	Commits the current trim range as a segment
Remove Segment	`Del`	Deletes the selected segment
Clear All	—	Deletes all segments

Extract Section

Button	Description
Batch Extract	Extracts all committed segments as individual files

AI Section

Button	Description
Scene Detect	AI automatically finds scene transition points
Silence Detect	Automatically finds sections with no sound
Silence threshold slider	-60dB to -20dB (adjusts silence detection sensitivity)

Misc Section

Button	Description
Batch	Queues multiple files for sequential processing
License	License activation or status check
About	App info, open-source licenses, update check

2.3 Preview Area

The large area below the toolbar that shows the current frame of the opened video.

Before opening a video: Film icon + “Preview” text
After opening a video: Displays the frame at the current playhead position
Playback controls are located at the bottom of this area:
- Stop button
- Play/Pause button (also controllable with Space key)

2.4 Timeline

The core editing area located below the preview (approximately 180px in height). Detailed information is covered in Section 4.

2.5 Status Bar

The information bar at the very bottom of the screen (height 24px).

Left: Current status message
- “Ready” — idle
- “Trimming… 45%” — trim in progress
- “Trim complete — video.mp4 (3.2s)” — complete
Progress bar: A blue progress bar is displayed during trim/export operations

3. Opening a Video

3.1 File Open Dialog

The most basic method:

Click the “Open” button in the toolbar (or press Ctrl+O)
Select a video file in the “Open Video File” dialog
Once the video loads, the preview and timeline become active

3.2 Drag and Drop

Drag a video file from File Explorer and drop it onto the DalCut window.

When dragging a file over the window, a semi-transparent overlay appears:
- Folder icon + “Drop video file here”
- “MP4, MKV, AVI, MOV, WebM, etc.” info text
Dropping the file loads the video

If you drag multiple files at once, only the first file is opened, and a message appears: “Use the Batch feature for additional files.”

3.3 File Explorer Right-Click

Right-click a video file and select “Open with DalCut” (see Section 1.4).

3.4 DalVideo Integration

After completing a recording in DalVideo, clicking the “Trim with DalCut” button in the completion panel opens DalCut with that video loaded.

Supported Formats (10 types)

Container	Extension
MP4	.mp4
MKV	.mkv
AVI	.avi
MOV	.mov
WebM	.webm
MPEG-TS	.ts
FLV	.flv
M3U8	.m3u8
3GP	.3gp
MJ2	.mj2

Video codecs: H.264, H.265, VP8, VP9, AV1, ProRes, DNxHR, MPEG-2, etc. Audio codecs: AAC, MP3, PCM, FLAC, Opus, Vorbis, etc.

4. Mastering the Timeline

The timeline is the heart of DalCut. It visually displays the flow of the video, and all editing operations such as trimming and selecting take place here.

4.1 Time Ruler

The horizontal bar at the very top of the timeline. Time is displayed in the format 0:00, 0:05, 0:10…

The ruler interval automatically adjusts based on the zoom level (1-second to 600-second intervals).

Timeline toolbar (above the ruler):

Left: Current time / total time — “00:10.123 / 01:23.456” format (Consolas font)
Center: Trim range + segment count — “00:10.000 <- 00:30.500 -> 00:40.000 | 3 segment(s)”
Right: Snap mode button + zoom controls

4.2 Thumbnails

Thumbnail images of the video are displayed as the background of the timeline track. They allow you to visually identify the video content, helping you quickly find the scene you’re looking for.

4.3 Playhead

The triangle pointer + vertical line on the timeline. It indicates the current position.

Drag: Drag the playhead to move it to the desired position
The preview updates to show the corresponding frame each time the playhead moves
The playhead has a lavender (light purple) color with a subtle glow effect

4.4 Zoom Controls

Three buttons in the upper-right corner of the timeline:

Button	Function	Shortcut
Zoom Out	View the timeline more broadly	—
Zoom In	View the timeline in more detail	—
Zoom Fit	Automatically adjusts so the entire video is visible	—
—	Zoom in/out with mouse wheel	`Ctrl+Mouse Wheel`
—	Horizontal scroll on the timeline	`Shift+Drag`

4.5 Snap Mode

Select the editing precision using the snap mode button on the right side of the timeline:

Mode	Description	When to use?
Keyframe (default)	Trim handles magnetically snap to the nearest keyframe	For lossless trimming (recommended)
Frame	Positions precisely at the frame level	When you need to cut at an exact point

Tip: Use “Keyframe” mode when performing lossless trims. Cutting at keyframe points ensures absolutely no quality loss.

Each click on the button toggles between the two modes.

4.6 Trim Handles

Draggable vertical handles (8px wide each) at both ends of the timeline.

Start handle (left): Rounded on the left side, cursor changes to a horizontal resize cursor
End handle (right): Rounded on the right side, cursor changes to a horizontal resize cursor
Two vertical lines (grip indicators) in the center of each handle make them easy to find
The area outside the handles is dimmed, visually distinguishing the portion to keep from the portion to cut

How to use:

Drag the start handle to the right to trim the beginning of the video
Drag the end handle to the left to trim the end of the video
The bright area between the handles is the final output range

Timeline markers:

White vertical lines: Keyframe positions
Purple (magenta) dots: AI scene detection results
Teal (cyan) regions: AI silence detection results
Color overlays: Committed segments

5. Trimming Video (Lossless Trim)

5.1 Selecting a Range with Trim Handles

What is this: A feature that keeps only the desired portion of the video and cuts off the front and back.

Why you need it: You can quickly remove unnecessary parts of a video (intros, dead time, mistake footage, etc.).

How to use it:

Open a video
Drag the start handle (left) on the timeline to the desired start point
Drag the end handle (right) to the desired end point
Click the “Lossless Trim” button in the toolbar (or press Ctrl+S)
Choose a save location and the trim begins

The file name is automatically suggested in the format originalname_trimmed.extension.

5.2 Using Keyframe Snap

When the snap mode is set to “Keyframe,” dragging the trim handles automatically snaps to the nearest keyframe.

Why this matters: Cutting at a non-keyframe point requires reconstructing that frame, which can cause slight quality loss or additional processing time. Cutting at a keyframe guarantees a perfectly lossless result.

The white vertical lines on the timeline indicate keyframe positions. You can see the handles snap precisely to these lines.

5.3 Lossless Save

Lossless trim operates using the Remux method:

Video/audio data is copied as-is without re-encoding
Therefore, there is absolutely no quality loss
It is very fast: approximately 2-4 seconds for a 1GB file

5.4 Frame-Accurate Precision Trim

Switching the snap mode to “Frame” allows you to cut at the exact frame position regardless of keyframes.

Note: When trimming at the frame level, FFmpeg internally decodes from the nearest preceding keyframe. The result is accurate, but it may take slightly longer than a lossless trim.

6. Multi-Segment Selection and Extraction

6.1 Adding Segments

What is this: A feature to select multiple portions from a single video and extract each as a separate file.

Why you need it: It’s convenient when you want to extract multiple highlight scenes from a long video at once. No need to open and close the file repeatedly.

How to use it:

Select the first range with the trim handles
Click the “Add Segment” button (Ctrl+Shift+A)
The range is displayed on the timeline with a color overlay
Move the trim handles to the next range
Click “Add Segment” again
Repeat as many times as needed

The current segment count is displayed in the center of the timeline toolbar: “3 segment(s)“

6.2 Managing Segments

Remove Segment: Deletes one selected segment (Del key)
Clear All: Deletes all segments (a confirmation dialog appears)

6.3 Batch Extract

Extracts all committed segments as individual files at once.

Add all desired ranges as segments
Click the “Batch Extract” button
Choose an output folder
Each segment is saved as originalname-1.mp4, originalname-2.mp4, … etc.

In the free version, an upgrade prompt appears if any segment exceeds 5 minutes in length.

7. Export

7.1 Export Dialog

Clicking the “Export” button in the toolbar (Ctrl+E) opens the export dialog (520x460).

Input file info: The top displays the source file’s path, resolution, FPS, codec, and duration.

Example: C:\Videos\sample.mp4 / 1920x1080 | 30.0fps | h264 | 1:23.456

7.2 Lossless (Remux) Mode

This is the default selection. Video/audio data is copied as-is without re-encoding.

Pros: Fastest, no quality loss
Cons: Cannot reduce file size, cannot change codec
Recommended: Use this mode in most cases

7.3 Re-encode Mode

Select the codec and quality manually for a fresh encode.

Codec selection:

Codec	File Size	Compatibility	Auto GPU Detection
H.264 (default)	Normal	All devices	NVENC > AMF > QSV > Software
H.265	30-50% smaller	Most devices	NVENC > AMF > QSV > Software
AV1	~50% smaller	Modern devices	NVENC > AMF > SVT-AV1 > libaom

DalCut automatically detects your GPU and selects the optimal hardware encoder. If the GPU doesn’t support it, DalCut automatically falls back to the software encoder.

Quality presets:

Preset	CRF Value	Encoding Speed	File Size	Use Case
Fast	28	Fast (8-10)	Large	When you need results quickly
Balanced (default)	23	Medium (4-5)	Normal	General purpose
Best Quality	18	Slow (1-2)	Small	When you need the highest quality

The estimated bitrate is displayed at the bottom of the dialog: “Estimated: ~8.5 Mbps”

7.4 Running the Export

Select lossless or re-encode mode
(If re-encoding) Choose the codec and quality
Confirm or change the output file path (default: originalname_trimmed.extension)
Click the “Export” button
A progress bar is displayed: “Exporting… 45%”
When complete, the result is shown in the status bar

A “Cancel” button appears during export to allow cancellation.

8. Batch Processing

8.1 Batch Dialog

What is this: A feature that queues multiple video files and processes them automatically in sequence.

Why you need it: Instead of opening and closing many videos one by one, you can register them all at once and have them processed automatically.

How to use it:

Click the “Batch” button in the toolbar
The batch dialog (680x520) opens

8.2 File Management

Buttons on the right side of the batch dialog:

Button	Function
+ Add Files (green)	Opens a file dialog to add video files
- Remove (red)	Removes the selected item from the queue
Clear All (gray)	Clears the queue (confirmation dialog)
Move Up	Moves the selected item’s processing order earlier
Move Down	Moves the selected item’s processing order later

Each item in the queue list:

Column	Content
Status icon	Pending / Processing / Complete / Error
File name + range	File name and selected trim range
Mode	”Lossless” or “H.264”, etc.
Result	Processing result message

8.3 Execution and Results

Add files and adjust the order
Click the “Start” button
Each file is processed sequentially
- Progress display: “Processing 3/5: video2.mp4”
- An overall progress bar shows 0-100%
You can stop processing with the “Cancel” button

Summary message on completion:

“Batch complete: 5 succeeded, 0 failed, 0 cancelled (12.3s)”
If any items failed, the error message is displayed on that item

9. AI Features

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

9.1 Scene Detection

What is this: AI analyzes the video and automatically finds points where the scene changes (screen transitions).

Why you need it: When you want to split a long video by scenes, AI finds them automatically instead of you having to search manually one by one.

How to use it:

Open a video
Click the “Scene Detect” button in the toolbar
Analysis begins: “Analyzing scene transitions… 45%”
On completion: “Scene detection complete: 12 transition(s) found”
Scene transition points are marked on the timeline with purple (magenta) dots

Analysis method:

Compares frames at 0.5-second intervals
Analyzes color distribution and pixel changes
Ignores short scenes under 1 second
Sensitivity: 0.0 (low) to 1.0 (high), default 0.5

You can cancel during analysis with the “Cancel” button.

9.2 Silence Detection

What is this: Automatically finds sections in the video where there is no sound or very quiet sound.

Why you need it: In lecture or presentation recordings, you can quickly find and remove break times, long silences, or “um…” moments.

How to use it:

Open a video
(Optional) Adjust the silence threshold slider in the toolbar
Click the “Silence Detect” button
Analysis begins: “Detecting silence regions… 60%”
On completion: “Silence detection complete: 8 silence region(s) found”
Silent sections are displayed on the timeline as teal (cyan) regions

Silence threshold slider:

Value	Meaning	Use Case
-60 dB (left)	Very sensitive — even very faint sounds are treated as “sound present”	Recordings in quiet environments
-40 dB (default)	Normal — typical background noise level	Most videos
-20 dB (right)	Low sensitivity — only loud sounds are treated as “sound present”	Recordings in noisy environments

Analysis method:

Measures audio level (RMS) at 0.1-second intervals
Marks sections below the set threshold as silent
Ignores short silences under 0.5 seconds

9.3 Using Detection Results

Scene detection and silence detection results are displayed visually on the timeline.

How to use them:

Adjust trim handles based on the displayed markers
You can split segments at scene transition points
Check silent sections and exclude them when trimming
Using both features together enables more precise editing

10. Complete Keyboard Shortcuts

Shortcut	Action	Available When
`Ctrl+O`	Open file	Always
`Ctrl+S`	Lossless trim (save)	After loading a video
`Ctrl+E`	Export	After loading a video
`Space`	Play/Pause	After loading a video
`Ctrl+Shift+A`	Add segment	After selecting a trim range
`Del`	Delete segment	After selecting a segment
`Ctrl+Z`	Undo	After an editing operation
`Ctrl+Mouse Wheel`	Timeline zoom	Over the timeline
`Shift+Drag`	Timeline horizontal scroll	Over the timeline
Mouse drag	Move playhead	Over the timeline

11. Settings and Environment

Theme

DalCut uses the Catppuccin Mocha dark theme.

Key colors:

Background: Dark navy (#313244)
Accent: Lavender (#B4BFFF)
Success: Green (#A6E3A1)
Warning: Yellow (#F9E2AF)
Error: Red (#F38BA8)
Info: Teal (#94E2D5)

The dark theme reduces eye strain and is comfortable for extended editing sessions.

Language Settings

You can select from 8 languages in the About window:

Language	Code
Auto (system default)	auto
English	en
Korean	ko
Japanese	ja
Chinese	zh
Spanish	es
French	fr
Arabic	ar
German	de

Changing the language requires restarting the app for the change to take full effect.

Auto Update

You can check for updates using the “Check for Updates” button in the About window.

Updates are distributed via GitHub Releases
A notification is displayed when an update is available

Settings File

Settings are automatically saved in JSON format.

Location: %APPDATA%\DALBIT\DalCut\settings.json
Save timing: On app exit + on settings change
Restore defaults: Delete the settings.json file and restart the app

Saved settings:

Setting	Default Value	Description
lastOutputPath	My Videos folder	Last used output path
language	”auto”	UI language
defaultCodec	”H264”	Default codec
qualityPreset	”Balanced”	Default quality preset
snapToKeyframe	true	Whether keyframe snap is enabled
sceneDetectionSensitivity	0.5	Scene detection sensitivity
silenceThresholdDb	-40.0	Silence detection threshold

12. License Management

How to Upgrade

DalCut Pro is a $19.99 lifetime license. Once purchased, you can use it permanently.

Click the “License” button in the toolbar
The license activation dialog opens
Enter the license key you received after purchase (Consolas font input field)
Click the “Activate” button
Success: “License activated. You can now use DalCut Pro.” (green)
On failure, an error message is displayed in red

Upgrade Prompt Timing

When a free user attempts to export a range exceeding 5 minutes, an upgrade dialog appears:

Title: “Output time limit reached”
Message: “The selected range ({duration}) exceeds the maximum output time ({max time}) for the free version.”
Options:
- “Continue (Free)” — Exports up to 5 minutes only
- “Upgrade to Pro” — Opens the Paddle payment page

License Deactivation

Click the “Pro” button in the toolbar (Pro users only)
A deactivation confirmation dialog appears
Confirming deactivates the license
The same key can then be used on another computer

Activation from the About Window

You can also manage your license from the About window:

Free users: License key input field + “Activate” button + “Upgrade” button
Pro users: “Pro” badge + “All features are enabled.” + “Deactivate” button

13. Troubleshooting (FAQ)

I can’t open a video

Check supported formats: Only MP4, MKV, AVI, MOV, WebM, TS, FLV, M3U8, 3GP, and MJ2 formats are supported
Check for file corruption: Verify the file plays in another player (e.g., VLC)
Check the path: Make sure the file path does not contain special characters

Lossless trim isn’t working

Check the trim range: Make sure the start handle is to the left of the end handle
Check the output path: Make sure the save folder exists and is writable
Check disk space: Ensure there is enough space for the output file

The trimmed video looks corrupted

Use keyframe snap: Set the snap mode to “Keyframe” and try trimming again
Cutting at a non-keyframe point may result in briefly corrupted frames at the beginning
For a perfect result, use Export with re-encode mode

Export is too slow

Use lossless mode: Use “Lossless (Remux)” mode instead of re-encoding
Lower the quality: Select the “Fast” preset when re-encoding
Check your GPU: If you have a GPU that supports hardware encoders, it will automatically be faster

AI scene/silence detection isn’t accurate

Scene detection: Adjust the sensitivity (the sceneDetectionSensitivity value in settings.json)
- If scene transitions are being missed, increase the sensitivity (0.5 -> 0.7)
- If too many are detected, decrease the sensitivity (0.5 -> 0.3)
Silence detection: Adjust the dB slider in the toolbar
- If silences aren’t being detected, go from -40 dB to -30 dB (more sensitive)
- If too many are detected, go from -40 dB to -50 dB (less sensitive)

I’m hitting the 5-minute limit

This is the output time limit of the free version
Solution 1: Select and trim only ranges of 5 minutes or less
Solution 2: Upgrade to Pro for $19.99 (lifetime license)
You can also click “Continue (Free)” to export up to 5 minutes only

Some items fail during batch processing

Check the failed items in the completion summary
The error message is displayed in the result column of each item
Common causes: file corruption, insufficient disk space, inaccessible output path
You can re-add only the failed items and retry

”Open with DalCut” from DalVideo isn’t working

Verify that DalCut is installed
Confirm that DalCut has been launched at least once (the path is registered on first launch)
If the issue persists, reinstall DalCut

The app closed unexpectedly

Error information is recorded in log files
- General log: %APPDATA%\DALBIT\DalCut\dalcut.log
- Crash log: %APPDATA%\DALBIT\DalCut\crash.log
If an error dialog appears, you can copy the error information using “Copy to Clipboard”

How to reset settings

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

Settings file location: %APPDATA%\DALBIT\DalCut\settings.json

System Requirements

Minimum Specifications

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

Recommended Specifications

Item	Requirement
Operating System	Windows 11 Pro
RAM	16 GB
Disk Space	20 GB SSD
GPU	NVIDIA RTX 2060+ / AMD RX 5500+ / Intel Arc A380+

Performance Reference

Task	Estimated Time
App launch	Approx. 1.2 seconds
Lossless trim (1GB file)	Approx. 2-4 seconds
Timeline rendering (1-hour video)	Approx. 200ms
RAM usage (during editing)	Approx. 100-150 MB

Need help? If you have an issue that this manual doesn’t resolve, you can get support on the official DALBIT website.

© 2026 DALBIT — Delivering Artificial Local Built-in Intelligence Tools

DalCut User Manual

Glossary (Read First)

1. Getting Started

1.1 Installation

1.2 First Launch Screen

1.3 Free vs Paid (5-Minute Output Limit Only)

1.4 File Explorer Right-Click Menu

2. Understanding the Main Screen

2.1 Title Bar

2.2 Toolbar

File Section

Edit Section

Segment Section

Extract Section

AI Section

Misc Section

2.3 Preview Area

2.4 Timeline

2.5 Status Bar

3. Opening a Video

3.1 File Open Dialog

3.2 Drag and Drop

3.3 File Explorer Right-Click

3.4 DalVideo Integration

Supported Formats (10 types)

4. Mastering the Timeline

4.1 Time Ruler

4.2 Thumbnails

4.3 Playhead

4.4 Zoom Controls

4.5 Snap Mode

4.6 Trim Handles

5. Trimming Video (Lossless Trim)

5.1 Selecting a Range with Trim Handles

5.2 Using Keyframe Snap

5.3 Lossless Save

5.4 Frame-Accurate Precision Trim

6. Multi-Segment Selection and Extraction

6.1 Adding Segments

6.2 Managing Segments

6.3 Batch Extract

7. Export

7.1 Export Dialog

7.2 Lossless (Remux) Mode

7.3 Re-encode Mode

7.4 Running the Export

8. Batch Processing

8.1 Batch Dialog

8.2 File Management

8.3 Execution and Results

9. AI Features

9.1 Scene Detection

9.2 Silence Detection

9.3 Using Detection Results

10. Complete Keyboard Shortcuts

11. Settings and Environment

Theme

Language Settings

Auto Update

Settings File

12. License Management

How to Upgrade

Upgrade Prompt Timing

License Deactivation

Activation from the About Window

13. Troubleshooting (FAQ)

I can’t open a video

Lossless trim isn’t working

The trimmed video looks corrupted

Export is too slow

AI scene/silence detection isn’t accurate

I’m hitting the 5-minute limit

Some items fail during batch processing

”Open with DalCut” from DalVideo isn’t working

The app closed unexpectedly

How to reset settings

System Requirements

Minimum Specifications

Recommended Specifications

Performance Reference