ezvid recorder

Purpose & User Intent: Ezvid Recorder solves the need for quick, local screen recordings for tutorials, demos, and training. Primary users include educators, developers, support staff, and content creators who require offline storage and fast turnaround. The tool records screen activity, optionally overlays a webcam, captures system and microphone audio, and exports a video file for sharing or archival. Core goal is reliable, privacy-preserving capture with predictable output quality.
Core Logic & Features: The domain logic includes configuring capture targets (screen, window, region) and sources (mic, system audio, webcam); starting and stopping capture; applying basic encoding settings; and providing post-capture trimming and export. Required features: local recording, MP4 export, stable encoding; Optional/advanced: multiple capture sources, presets for resolution and frame rate, hotkeys, and simple trim. Distinguishing values include offline processing, deterministic outputs, and straightforward workflows.
Inputs & Outputs: Inputs cover capture_mode (full/window/region), region coordinates (x,y,w,h), frame_rate (fps), resolution (width x height), audio_sources (mic/system/both), mic_volume, system_volume, webcam_overlay, webcam_position, output_format (MP4), output_path. Outputs include video_file path, duration_seconds, file_size_bytes, encoding_settings (codec, bitrate). Sample values: capture_mode=region, region=(100,100,1280,720), frame_rate=30, resolution=1280x720, audio_sources=both, output_path='C:/videos/demo.mp4'.
Algorithms & Calculations: Encoding pipeline uses MP4 with H.264/AVC. Bitrate is selected based on resolution and frame rate (e.g., 1080p60 ~ 8–12 Mbps, 1080p30 ~ 6–9 Mbps). Timestamps synchronize audio and video; support for basic bitrate throttling and hardware acceleration when available.
Error & Edge Cases: Handles insufficient disk space, missing capture permissions, region outside bounds, conflicting audio devices, and unsupported formats. Returns standardized error codes and avoids partial writes to protect file integrity. External devices may be temporarily unavailable; retry logic can be applied by the host integration.
Industry/Region & Localization: Uses standard MP4/H.264 encoding for broad compatibility; default units are pixels and Hz; works on Windows and macOS; no platform-specific UI messaging required in the data layer. Localization can be applied to non-UI strings when integrated into apps.
Assumptions & Exclusions: Assumes local processing with no cloud uploads by default; not a live streaming tool; excludes advanced video editing features like color grading or multi-track timelines; globe-specific standards or regional licensing is out of scope.