MPG to AIFC Converter

Extract MPG Audio to AIFC: What This Tutorial Covers

This walk-through is for anyone holding an .mpg (or .mpeg) video who needs the soundtrack on its own as an .aifc (AIFF-C) file — usually to feed a legacy Apple tool, sampler, or DAW that specifically wants the .aifc form. Two things are worth understanding before you start: this conversion keeps the audio and discards the video, and because the audio inside an MPG is almost always lossy, the AIFC will be larger than the source audio without sounding any better. The sections below explain why, then get you a clean AIFC.

How to Convert MPG to AIFC

1. Upload Your MPG File: Drag and drop your .mpg or .mpeg onto the page, or click "+ Add Files" to browse. Queue several clips and they convert in a single batch with the same settings.
2. Set the Audio Sample Rate: Open Advanced Options and leave Audio Sample Rate on "Original" for a true 1:1 transfer of the source audio, or pick a specific rate only if a target sampler or device requires one.
3. Set the Audio Channel or Trim (Optional): Leave Audio Channel on "Original" to keep the source layout, or force Mono/Stereo. Set Trim (default "Unchanged") to export only a start-and-duration window instead of the whole track.
4. Convert and Download: Click "Convert" and download your AIFC file. No sign-up, no watermark.

Walk-through: The Video Is Discarded, and MP2 Audio Won't Get Better

An .mpg file is an MPEG-1 (or sometimes MPEG-2) program stream — the format standardized as ISO/IEC 11172 in 1993 and used by Video CD, DVD rips, and old TV captures. It multiplexes a video stream with an audio stream. This converter reads the audio stream, decodes it to raw samples, and wraps those samples in an AIFF-C file as uncompressed PCM, 16-bit, big-endian (compression type NONE). The picture is not in the output at all — if you wanted to keep the video, this is the wrong tool.

The audio inside an MPG is almost always MP2 (MPEG-1 Audio Layer II) — the lossy sub-band codec that ships as the standard soundtrack of Video CD and PAL DVD-Video, typically encoded somewhere between 192 and 256 kbps for near-CD quality. Because MP2 is lossy, it permanently dropped some detail when the MPG was first encoded:

• Decoding MP2 to uncompressed PCM cannot put that detail back. The AIFC sounds identical to the audio your player already produces from the MPG; it just stores every sample in full instead of in a compressed stream.
• So the AIFC is much larger than the MPG's audio, not better. You are paying bytes for a container change, not buying fidelity. CD-quality stereo PCM runs about 10 MB per minute, so a compact 192 kbps MP2 soundtrack commonly expands several-fold.

The conversion never makes the audio worse than it already was — it just can't make lossy audio better, and the format name shouldn't fool you (see the AIFC FAQ below).

MPG Audio vs AIFC Output at a Glance

Common Errors and How to Fix Them

• "My AIFC is huge compared to the MPG's audio" — Expected. The MPG's soundtrack was lossy MP2; the AIFC writes uncompressed PCM, which is several times larger. The extra bytes are raw data, not added quality. If you want a small file, use MPG to MP3 instead.
• "The AIFC won't play in my media player" — Some Windows players and browsers handle AIFF-C poorly. It plays natively on macOS, in QuickTime, Logic, and most pro DAWs; elsewhere, VLC opens it. If you need broad compatibility, MPG to WAV is the more universally accepted uncompressed format.
• "I expected AIFC to be smaller because the 'C' means Compressed" — The C describes a capability of the AIFF-C wrapper, not your file. This converter writes uncompressed PCM into it, so the output is larger, not smaller.
• "The output is silent or empty" — Some MPG files are video-only with no audio stream, or carry an audio track that won't decode. Confirm the MPG actually plays sound first; if it does, re-run the conversion.
• "I only need part of the soundtrack" — Set Trim before converting to export just a start-and-duration window rather than cutting the AIFC afterward.

When This Doesn't Work

This tool needs a real, playable MPG with a decodable audio stream — it can't read a corrupted file, and it never recovers fidelity that the lossy MP2 codec discarded earlier. It also can't keep the video; the output is audio only. If AIFC isn't actually what you need, two targets are usually better: most people who want a small, universally playable audio file should use MPG to MP3, and anyone editing or mastering on a non-Apple system will find MPG to WAV — the standard uncompressed PCM editor format — more widely supported than AIFC. Reach for AIFC specifically when a piece of Apple software demands the .aifc form.

Frequently Asked Questions

Does converting MPG to AIFC keep the video?

No. This is an audio-extraction tool: it reads the audio stream out of the MPG, writes it to an AIFC file, and discards the video entirely. The output has no picture. If you want to keep the video and only change the container or codec, you need a video-to-video conversion, not this one.

Will the AIFC sound better than the audio in my MPG?

No. An MPG's soundtrack is almost always MP2 (MPEG-1 Audio Layer II), a lossy codec that permanently dropped some detail when the file was first encoded. Decoding that MP2 to uncompressed PCM and wrapping it in AIFC stores the samples your player already produces — it can't reconstruct what was removed. The AIFC sounds the same as the MPG's audio, just in a larger, uncompressed container.

Why is the AIFC file so much larger than my MPG's audio?

Because the AIFC here is uncompressed. MP2 inside an MPG typically runs 192-256 kbps; the AIFC writes every sample out in full at 16-bit, which is equivalent to roughly 1411 kbps for CD-quality stereo. CD-quality stereo PCM runs about 10 MB per minute, so a compact compressed soundtrack commonly expands several-fold. The added bytes are uncompressed data, not extra fidelity.

Is AIFC compressed, since the "C" stands for "Compressed"?

Not as written here. AIFF-C is a container that can carry compressed audio — legacy codecs like MACE, A-law, or μ-law — but it equally holds uncompressed PCM, and that is what this converter writes (compression type NONE, 16-bit big-endian). The "C" describes a capability of the wrapper, not the contents of your file. In our testing, a one-minute MPG with a 224 kbps MP2 track produced an AIFC of roughly 10 MB — far larger than the source audio, exactly because it is uncompressed.

When should I pick AIFC instead of WAV or MP3 for MPG audio?

Pick AIFC only when a specific tool demands the .aifc form — for example a pre-Logic-era Apple authoring app or an older sampler that imported AIFF-C natively and rejects other containers. For editing or mastering on most systems, the uncompressed MPG to WAV is the more standard and widely supported target; for a small, universally playable file, MPG to MP3 is the better choice. AIFC is the niche pick, not the default.

How are my files handled, and how long do you keep them?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public.