User Instructions

VideoAnalyzer by Rein Haljand

User Instructions – Technique Analyses

1. Starting the Application

1. Double-click the VideoAnalyzer icon to launch the application.
2. Open the Main Menu (upper-left corner) to access:

• Open New Video File
• Save Analyzer File (MJPEG2)
• Save Analyzer Picture (PNG)
• Analyzer – Horizontal Split Screen
• Analyzer – Vertical Split Screen
• Save Measurements File

After opening a video file:

• The first video frame is displayed.
• Upper-left corner: timecode, frame number, FPS and resolution.
• Upper-right corner: ClipInfo button (show / hide FPS and resolution).
• Top bar: video clip name.
• Bottom row and right column: function buttons.

Button colors:

• Light blue – active
• Light gray – inactive
• Dark blue – currently selected function

2. Activating Measurement Functions (Scaling Required)

Distance and speed measurements require correct scaling.

1. Press Set Scale (right side, bottom row).
2. After scaling is completed, measurement buttons become active (light blue).

Button behavior:

• Click once to start a measurement.
• Click again to stop and save the result.
• Starting another function automatically ends and saves the previous one.
• Hovering over a button shows a tooltip describing its function.

3. Saving Your Work

To save all drawings, measurements and comments:

1. Open the Main Menu.
2. Select Save Analyzer File (MJPEG2).
3. Wait until saving is complete.

Saved file types:

• Analyzer file (.mjpeg2): video + all analysis elements (opens only in VideoAnalyzer).
• Analyzer picture (PNG): saves the current screen image with drawings and data.
• Measurements file (CSV): can be opened in Excel or Numbers.

4. Video Controls and Keyboard Shortcuts

• Space – Play / Pause
• Q / W – 1 frame backward / forward
• A / S – 5 frames backward / forward
• Z / X – Jump to beginning / end
• R – Slow motion
• B – Show / hide scale targets
• P – Show / hide progress bar
• F – Show / hide all function buttons

5. Scaling Procedure (2.5 m Reference)

Scaling defines how many screen pixels represent 2.5 meters in real distance.

Scaling is required for:

• Fixed cameras (start, side view)
• Moving above-water trolley cameras (side view)
• Moving underwater trolley cameras (side view)

Scaling is not required for:

• Front or rear camera views
• Pure time-only analysis

6. Scaling with Fixed and Above-Water Moving Cameras

1. Record a short scaling clip (2–3 seconds) without a swimmer.
2. Place a 2.5 m stick in the center of the block and record with the same camera position.
3. Open the scaling clip in VideoAnalyzer.
4. Measure the pixel length of 2.5 m (Angle tool can be used as a pixel reference).
5. Open the swimmer video and activate Scaling.
6. Set scale on the first frame, then transfer to the last frame (use Z and X for quick navigation).
7. Verify scaling and save the scaled Analyzer file.

Important: After saving the scaled file, do not change scaling again during the analysis.

7. Scaling with Underwater Moving Camera (Side View)

• Place a marked scaling rope (~2 m deep) in the center of the lane.
• The swimmer must swim directly above the rope.
• The trolley must follow the swimmer at the same speed, keeping the swimmer centered on screen.

Procedure:

1. Begin scaling when the camera starts moving.
2. Identify scaling points only on still frames (use Space to pause).
3. Left-click to mark 2.5 m intervals. Use right-click only to transfer reference points.
4. Transfer markers before they leave the screen; continue through turns even if direction changes.

8. Analysis Functions

Drawing tools and common options: Size, Color, Audible (voice), HL (blinking highlight), fno (number of frames visible).

• Text (Tx)
• Arrow
• Rectangle / Ellipse
• Line
• Spline
• Angle
• Time stamp
• t+ (multiple intervals and total time)

9. Measurement Functions

• Reference lines (horizontal / vertical)
• Stroke and kick pattern analysis (P1–P4, PP)
• Speed and distance measurements (V, S, VT, VS, VST)
• Accumulated measurements (V+, S+)

10. Bottom Menu Controls

• Mute generated sound / background sound
• TimeZero
• Mirror view
• Undo last object
• Delete all drawings (scaling preserved)
• Move and drag objects

11. Split Screen and Full Pool Analysis

• Use Split Screen to compare techniques.
• Use Zoom and Drag for full-pool analysis.
• Lines remain fixed regardless of zoom.

Final Notes

• Scaling must be done in the same plane as swimmer movement.
• Keep the swimmer in the center of the lane for best accuracy.
• Incorrect scaling produces incorrect results.

Start using VideoAnalyzer for Technique Analyses.
Rein Haljand