WTV to AIFC Converter

How to Convert WTV to AIFC Online

1. Upload Your WTV File: Drag and drop or click "Add Files" to select the .wtv recording from Windows Media Center (Vista with TV Pack 2008 or any Windows 7 Media Center edition). Batch is supported — drop a whole season's worth of recordings in at once.
2. Pick Audio Codec (AIFC compression): AIFC (AIFF-C, Apple 1991) is a container that can hold many compression types. Common choices are PCM μ-law (G.711, ~2:1, telephony), PCM A-law (G.711, ~2:1, European telephony), or uncompressed PCM signed 16-bit big-endian for lossless storage in the AIFC wrapper. The default keeps the audio decoded from the WTV's MPEG-1 Layer II or Dolby Digital AC-3 stream.
3. Set Audio Sample Rate, Channel, and Trim (Optional): Match the source (broadcast TV audio is typically 48 kHz stereo for AC-3, 44.1 or 48 kHz for MP2). Downsample to 22.05 or 16 kHz for speech-only recordings to halve file size. Pick mono or stereo. Trim sections using start time + duration in HH:MM:SS.sss (handy for clipping out the ad breaks Media Center recorded).
4. Convert and Download: Click Convert. The video stream is discarded, the audio is decoded, re-encoded into the chosen AIFC compression type, and wrapped in a FORM/AIFC container with the required FVER chunk. Files process in your browser session — no sign-up, no watermark.

Why Convert WTV to AIFC?

WTV (Windows Recorded TV Show) is Microsoft's proprietary container for TV captured by Windows Media Center, replacing the older DVR-MS format. It stores MPEG-2 video alongside MPEG-1 Layer II or Dolby Digital AC-3 audio, plus DRM flags and EPG metadata. WTV is effectively legacy — Windows Media Center shipped only in Vista (with TV Pack 2008) and Windows 7, and Microsoft dropped it entirely from Windows 8 onward. Anyone with an archive of .wtv recordings now has files that don't play on modern Windows without third-party tools.

AIFC (also written AIFF-C, the compressed variant of AIFF that Apple introduced in 1991) is the Apple-side equivalent of WAV-with-compression: same chunk-based IFF/RIFF lineage, but the COMM chunk carries a compression type that can be uncompressed PCM, μ-law, A-law, IMA ADPCM, or other codecs. Converting WTV → AIFC extracts just the audio in an Apple-friendly wrapper. Common reasons:

• Rescue audio from a dead WTV archive — A radio show, lecture, or commentary track you recorded years ago in Media Center is still useful as audio even though the video container is obsolete. AIFC preserves the audio in a format that QuickTime, Logic Pro, and macOS Finder all recognize.
• macOS / pro-audio workflow — If you're editing in Logic Pro or running a Mac-based broadcast archive, AIFC is the native Apple audio container. The file lands as a recognizable Apple-format asset rather than a Windows-only .wtv.
• Telephony-style compression for speech recordings — μ-law and A-law (ITU-T G.711) cut the data rate roughly in half versus PCM with quality acceptable for voice. Useful when a Media Center recording is a talk show, sermon, or audiobook broadcast.
• Smaller storage than uncompressed WAV/AIFF — AIFC with μ-law at 8 kHz mono is ~64 kbps; AIFC with PCM 16-bit/44.1k stereo is ~1411 kbps. You pick the codec to match the source content rather than carrying the WTV's video overhead.
• Strip DRM-free audio for personal use — WTV files without DRM flags can be transcoded freely. Converting to AIFC gives you an audio-only working copy that won't be locked to a single Media Center PC.
• Migrate to non-Microsoft systems — Moving an old PC's recording archive to a Mac, NAS, or audio-only library. AIFC is portable and well-documented (Apple's 1991 spec is still authoritative).

If you need maximum compatibility, convert to WAV or MP3 instead — AIFC is less universally supported than either, and some players don't decode the more exotic AIFC compression types.

WTV vs AIFC — Format Comparison

AIFC Compression Type Quick Guide

Compression types follow Apple's AIFF-C 9/26/91 specification. Not every player decodes every type; uncompressed PCM and μ-law/A-law are the most universally supported AIFC variants.

Frequently Asked Questions

What's the actual difference between AIFC and AIFF?

AIFF stores only uncompressed PCM audio. AIFC uses the same IFF chunk structure but adds a compression-type field to the COMM chunk and a required FVER chunk identifying the AIFF-C revision. The FORM identifier changes from FORM ... AIFF to FORM ... AIFC. If you pick uncompressed PCM as the AIFC compression type, the audio data is bit-identical to AIFF — only the wrapper differs. If you pick μ-law, A-law, IMA ADPCM, or another codec, AIFF can't represent it but AIFC can.

Why convert to AIFC instead of plain AIFF or WAV?

Pick AIFC when you specifically need an Apple-format container with compression — for example, telephony-style μ-law for a voice archive, or to match an existing AIFC asset library. If you just want lossless on macOS, WTV to AIFF gives broader compatibility. If you want lossless that plays everywhere, WTV to WAV is the safest choice. AIFC's edge is the codec flexibility inside an Apple wrapper.

Will modern players actually open AIFC files?

It depends on the compression type. Uncompressed PCM, μ-law, and A-law AIFCs open in QuickTime, Logic Pro, Audacity, and FFmpeg-based tools. The more exotic Apple compressions from the 1990s (MACE 3:1, MACE 6:1, QDesign Music, Qualcomm PureVoice) are poorly supported in 2026 — many modern players will fail to decode them. Pick PCM or μ-law/A-law for safety unless you specifically need a legacy codec.

What's inside a WTV file and does any of the video survive the conversion?

A WTV contains MPEG-2 video, MPEG-1 Layer II or Dolby Digital AC-3 audio, EPG metadata, and optional DRM flags. The conversion to AIFC discards the video stream entirely and decodes only the audio. If the WTV was a recorded TV broadcast at 48 kHz AC-3 5.1, the converter downmixes to stereo (or mono if you pick that) before re-encoding into the AIFC compression you chose.

My WTV won't convert — what's wrong?

Most likely it's DRM-protected. Cable TV recordings made with CableCARD or recordings flagged by the broadcast flag are restricted to the Media Center PC that recorded them. You'll see this as a decode failure. Free-to-air ATSC recordings and personal recordings without DRM flags convert without issue. If conversion fails on what should be an unprotected file, try first converting WTV to MP4 with a tool like FFmpeg, then upload the MP4 here.

Does this work for DVR-MS files too?

DVR-MS is the predecessor to WTV (Windows XP Media Center Edition era, ASF-based). Use the DVR to AIFC converter for those. Both share the same audio codec lineage (MP2 / AC-3) so the audio-extraction step is similar; only the container differs.

What sample rate should I pick?

Match the source. Most WTV files have 48 kHz audio (broadcast standard for AC-3) or 44.1/48 kHz for MP2. Downsampling to 22.05 kHz roughly halves the file size and is fine for voice content; downsampling to 16 kHz or 8 kHz is voice-grade and pairs naturally with μ-law / A-law compression. Avoid upsampling — it adds no audio information, just bytes.

Can I trim the audio during conversion?

Yes. Enter start time and duration in HH:MM:SS.sss. For a 30-minute Media Center recording with a 4-minute ad-free segment starting at 12:30, use start = 00:12:30 and duration = 00:04:00. The converter extracts and re-encodes only that range — useful for pulling a single song from a broadcast music block or skipping the commercials a Media Center recording captured before/after the program.

What about Apple Silicon Macs — will the AIFC play in QuickTime?

PCM, μ-law, and A-law AIFCs open in QuickTime on Apple Silicon without issue. Pro Tools and Logic Pro on macOS 12+ also decode these. If you need maximum compatibility across macOS versions and apps, stick to PCM-in-AIFC (or AIFF). The older MACE / QDM codecs are no longer guaranteed to decode on modern macOS — Apple removed several legacy codecs in the 64-bit-only transition.