CPVid

CPVid is a native video player built specifically for the CASIO ClassPad II (fx-CP400). Experience video playback on your calculator with optimized performance using the QOI (CPQOI) format, significantly faster than Python-based alternatives.

Download Example Video

Features

• Native implementation: Built from the ground up for optimal performance on the fx-CP400
• QOI format support: Utilizes CPQOI (ClassPad QOI) for faster decoding than PythonExtra CPyVid
• Simple file structure: Just place VIDEO.gmpak in root storage
• Frame-by-frame control: Navigate individual frames when paused
• Automatic looping: Videos loop by default for continuous playback
• Online converter: Easy-to-use web-based video conversion tool

Installation

1. Download CPVid.hh3 from the official GitHub releases
2. Place the file on your ClassPad II storage
3. Convert your video to .gmpak format using the online converter
4. Place the VIDEO.gmpak file in the root of your calculator storage
5. Launch CPVid from the Hollyhock-3 application menu

Video Format

CPVid uses the .gmpak format, a custom video container optimized for the ClassPad II hardware.
You can learn more at https://therainbowphoenix.github.io/CPyVid/gmpak_explorer.html

Converting Videos

Use the online converter to create your own .gmpak files:

1. Visit the converter at https://therainbowphoenix.github.io/CPyVid/video_to_gmpak.html
2. Upload your video file
3. Configure conversion settings
4. Download the resulting VIDEO.gmpak file
5. Transfer to your calculator's root storage

Controls

Playback Controls

Key	Action
[EXE] (long press)	Play/Pause
[DEL] (long press)	Exit player
[4] (when paused)	Previous frame
[6] (when paused)	Next frame

Default Behavior

• Videos automatically loop when they reach the end
• Frame navigation only available in pause mode
• Long press required for primary actions to prevent accidental input

Compatibility Note

Important: CPVid is not backward compatible with V2 CPVid. This is a completely new program sharing similar concepts but using a different file format and implementation.

Technical Details

• Format: .gmpak (custom video container)
• Codec: QOI (CPQOI variant)
• Performance: Optimized native code, faster than Python-based players
• Storage: Video file must be placed in root storage directory

Example Videos

The release package includes example videos demonstrating the player's capabilities, including BAD_APPLE.gmpak and BEAST.gmpak.

Notes

CPVid is primarily a demonstration of video playback capabilities on the ClassPad II platform. Performance may vary depending on video resolution, frame rate, and calculator system configuration.