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O převodu MPEG na ALAC

MPEG video files from the DVD and broadcast era contain audio encoded as MPEG Audio Layer 2, a competent but dated lossy codec. ALAC (Apple Lossless Audio Codec), released by Apple in 2004 and open-sourced in 2011, provides bit-perfect audio reconstruction with roughly 50-60% compression compared to raw PCM. Converting MPEG to ALAC extracts the audio into Apple's lossless ecosystem.

Proč převádět MPEG na ALAC?

If your media library lives in the Apple ecosystem — iTunes, Apple Music, iPhone, iPad, HomePod — ALAC is the only lossless format with native, seamless support across all devices. While FLAC offers slightly better compression ratios, it requires third-party apps on iOS and is not supported by iTunes at all.

Extracting audio from MPEG recordings into ALAC preserves every bit of decoded audio while integrating perfectly with Apple's metadata, AirPlay, and sync infrastructure. For audiophiles migrating a collection of digitized broadcast recordings or concert footage into their Apple Music library, ALAC is the ideal target format.

Běžné případy použití

Building a lossless Apple Music library from extracted broadcast audio
Preserving concert audio from MPEG-2 DVD recordings in Apple's ecosystem
Creating high-quality audio archives playable on iPhone, iPad, and Apple TV
Syncing extracted lecture audio to Apple devices via iTunes or Finder
Preparing extracted tracks for AirPlay streaming to HomePod speakers

Jak to funguje

FFmpeg decodes the MPEG video container, discards the video stream, and re-encodes the MP2 audio to ALAC inside an M4A container. The command uses `-vn -acodec alac -ar 44100 -ac 2`. ALAC output is wrapped in an MP4/M4A container, which is required for Apple device compatibility. Unlike FLAC, ALAC does not support Ogg or Matroska containers.

Kvalita a výkon

ALAC is mathematically lossless — it reconstructs the exact PCM samples that were fed into it. However, since the source is lossy MP2, the ALAC file perfectly preserves the MP2-decoded audio, artifacts and all. File sizes are about 50-60% of equivalent AIFF/WAV, but significantly larger than the source MP2 since lossless compression cannot match lossy compression ratios.

FFMPEG EngineModerateLossless

Kompatibilita zařízení

Device	MPEG	ALAC
Windows PC	Partial	Partial
macOS	Partial	Native
iPhone/iPad	Partial	Native
Android	Partial	Partial
Linux	Partial	Partial
Web Browser	No

Doporučená nastavení podle platformy

YouTube

Resolution: 1920x1080

Bitrate: 8-12 Mbps

H.264 recommended for fast processing

Instagram

Resolution: 1080x1080

Bitrate: 3.5 Mbps

Square or 9:16 for Reels

TikTok

Resolution: 1080x1920

Bitrate: 4 Mbps

9:16 vertical, under 60s ideal

Twitter/X

Resolution: 1280x720

Bitrate: 5 Mbps

Under 140s, 512MB max

Resolution: 960x540

Bitrate: 2 Mbps

16MB limit for standard, 64MB for document

Discord

Resolution: 1280x720

Bitrate: 4 Mbps

Tipy pro nejlepší výsledky

1Keep the output at 16-bit/44.1 kHz to match the source quality — upsampling lossy audio to 24-bit adds file size without improving fidelity
2Tag your ALAC files with proper metadata during conversion for seamless iTunes library integration
3If you plan to share files with non-Apple users, consider converting to FLAC instead — it has broader cross-platform support
4Use the M4A container (not CAF) for ALAC output to ensure compatibility with all Apple devices including older iPods
5Batch-convert entire MPEG archives at once — ALAC encoding is fast because the compression algorithm is computationally lightweight

Související převody

MPEG to MP4 Converter MPEG to AVI Converter MPEG to WebM Converter MPEG to AAC Converter MPEG to FLAC Converter MP4 to ALAC Converter AVI to ALAC Converter WebM to ALAC Converter AAC to ALAC Converter FLAC to ALAC Converter ALAC to MP4 Converter

MPEG to ALAC conversion is the cleanest path from legacy video archives to Apple's lossless audio ecosystem, ensuring no further quality degradation while maintaining full device compatibility.

Často kladené otázky

Yes. ALAC provides bit-perfect reconstruction of the input audio. The decoded output is identical sample-for-sample to what was encoded. However, your source is lossy MP2, so ALAC preserves the MP2 quality level exactly.

Android has supported ALAC playback since version 3.1 (Honeycomb). Most modern Android music players handle ALAC without issues, though FLAC remains more universally supported on non-Apple platforms.

FLAC typically achieves 2-5% better compression than ALAC. The difference is negligible in practice. Choose ALAC for Apple ecosystem integration, FLAC for cross-platform use.

Yes. The M4A container supports embedded cover art, track metadata, and even lyrics — all of which sync seamlessly with iTunes and Apple Music.

No. Converting lossy to lossless preserves the existing quality but cannot add back information that MP2 compression discarded. The benefit is preventing any further loss during future editing or re-encoding.

ALAC supports up to 32-bit/384 kHz audio, matching or exceeding most high-resolution formats. For MPEG extractions, 16-bit/44.1 kHz is standard since that matches the typical MP2 source quality.

Související převody a nástroje

Převeďte MPEG také na

MPEG to MP4→MPEG to AVI→MPEG to WebM→MPEG to AAC→MPEG to FLAC→MPEG to MKV→

Převeďte také na ALAC

MP4 to ALAC→AVI to ALAC→WebM to ALAC→

Convert MPEG to ALAC — Free Online Converter