Convert AIFF-C Compressed Audio (.aifc) to Audio Video Interleave (.avi) online for free. Fast, secure audio conversion with no watermarks or registration.
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AIFC (AIFF-C) is Apple's legacy compressed audio format from the late 1980s, storing audio in codecs like IMA ADPCM, MACE 3:1/6:1, and uncompressed PCM within an IFF-derived container. AVI (Audio Video Interleave) is Microsoft's classic multimedia container from 1992, based on the RIFF structure and widely supported on Windows systems and legacy media players.
Converting AIFC to AVI produces an audio-only AVI file — the audio stream is re-encoded and placed in the AVI container without any video track. This is primarily useful for integration with legacy Windows-based media workflows, video editing timelines, and multimedia authoring tools that expect AVI input.
Legacy Windows multimedia software often requires AVI as its input format, even for audio-only content. Video editing tools like VirtualDub, older versions of Adobe Premiere, and Windows Movie Maker work natively with AVI but may reject AIFC entirely. Wrapping audio in AVI makes it importable into these Windows-centric workflows.
AIFC is virtually unknown on Windows — the format was exclusive to Apple's Mac OS and NeXTSTEP ecosystems. AVI, as a Microsoft format, has decades of built-in Windows support. For teams moving legacy Mac audio assets to Windows-based production pipelines, AVI provides a familiar container that every Windows application recognizes.
FFmpeg decodes the AIFC container (handling PCM, IMA ADPCM, MACE, u-law, or A-law) to raw PCM samples. The audio is then encoded as PCM (for lossless) or MP3/AC3 (for compressed) and muxed into an AVI container using Microsoft's RIFF structure. No video track is created — the AVI file contains only the audio stream. The RIFF container stores audio in little-endian byte order, automatically handling the byte-order conversion from AIFC's big-endian format.
When using PCM audio in the AVI container, quality from an uncompressed AIFC source is perfectly preserved — the byte order is converted but the audio data is bit-for-bit identical. With MP3 or AC3 encoding, quality depends on the chosen bitrate. MACE-compressed AIFC sources will produce output limited by the original MACE quality regardless of the AVI audio codec chosen.
| Device | AIFC | AVI |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
AIFC to AVI bridges Apple's legacy compressed audio into Microsoft's classic multimedia container. The resulting audio-only AVI file integrates seamlessly with Windows-based editing and playback tools.
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| No |
| Funktion | AIFC | AVI |
|---|---|---|
| Fullstandigt namn | AIFF-C Compressed Audio | Audio Video Interleave |
| Filandelse | .aifc | .avi |
| Bast for | Compressed AIFF | Windows native |