In-Browser Recorder

Purpose & User Intent: This tool delivers a no-download, in-browser recorder that captures audio, video, or screen input and keeps the recording in memory as a shareable data URL. Target users include developers, QA engineers, educators, support teams, and content creators who need quick evidence, demos, or tutorials without installing software. When to use: for bug reproduction, product demos, or privacy-sensitive recordings where a local file is not persisted on disk.\n\nCore Logic & Features: The core runs on the MediaRecorder API with in-browser encoding. Required features include microphone/camera or screen capture permissions, real-time capture, encoding to a portable data URL, and in-memory storage. Optional/advanced features include screen-audio capture, adjustable bitrate and frame rate, device selection, duration-based auto-stop, and in-browser preview. The tool avoids automatic downloads; outputs are data URLs and metadata that users can copy or share via ephemeral links if supported by the host page.\n\nInputs & Outputs: Inputs include recording_type (audio, video, or screen-audio); duration_seconds (optional, default 0 for manual stop); mime_type (optional, auto-selected); include_system_audio (optional); mic_device_id (optional); video_frame_rate (optional); audio_bitrate_kbps (optional). Outputs include recording_data_uri (string data URL); mime_type (string); duration_seconds (number); size_bytes (number); status (string). All data resides in memory; there is no server upload or long-term persistence unless the user exports.\n\nAlgorithms & Calculations: The capture collects chunks via MediaRecorder, assembles a Blob, and converts to a data URL for in-browser use. Estimated size = duration_seconds × bitrate_kbps ÷ 8 (bytes); actual size varies with codec. If screen capture is active, browser support may differ; no server-side processing is performed. The approach favors privacy by design since recordings are not uploaded by default.\n\nError & Edge Cases: If permissions are denied or APIs unsupported, recording cannot proceed; the tool reports-internal status without UI messaging. Very long durations can exhaust memory; if the tab suspends, recording may pause or fail. Unsupported mime types trigger a fallback to a supported codec if available. Inconsistent device availability or abrupt tab closures can lead to partial recordings.\n\nIndustry/Region & Localization: Based on WebRTC/MediaRecorder standards; supports major browsers; no server localization needed; times and units are in seconds, bits, and bytes; no currency or region-specific formats.\n\nAssumptions & Exclusions: Assumes user agrees to capture only permitted content; no external uploads unless the user exports. Excludes long-term storage, transcription, or server-side processing.