Audio Format Converter

Purpose & User Intent: This tool provides a focused, file-based transcoding path to convert OGG audio to the M4A container using AAC encoding. Target users include content creators, podcasters, QA engineers, and developers who need AAC-based audio for cross‑platform compatibility in streaming, apps, and distribution. Example: convert a 5–10 minute OGG Vorbis file to M4A at a chosen bitrate to meet platform requirements.
Core Logic & Features: The workflow handles input validation, format mapping, and encoder parameterization. Required features include input_file and output_format (set to M4A). Optional/advanced features include bitrate_kbps, sample_rate_hz, channels, metadata_preservation, and batch_processing. It supports progress reporting and error signaling.
Algorithms & Calculations: The tool performs AAC encoding inside an M4A container, adjusting sample rate, channels, and bitrate per user settings. If optional values are omitted, sensible defaults are applied. Metadata can be copied when supported. Processing time scales with input duration and encoding complexity.
Error & Edge Cases: Non-OGG input, unsupported codecs, or corrupted files yield a precise error. Missing required inputs, exceedingly large files, or timeouts may trigger queueing or safe fallbacks. Some advanced OGG metadata may not survive transcoding.
Industry/Region & Localization: Units used are bitrate (kbps) and sample rate (Hz). The approach aligns with common cross‑region streaming and device expectations for AAC in M4A. No regional copyright restrictions are assumed.
Assumptions & Exclusions: The specification covers audio-only transcoding; it does not perform video processing, normalization, or complex metadata editing beyond basic transfer rules.