Convert MPEG Transport Stream (.ts) to Apple Lossless Audio Codec (.alac) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .ts file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .m4a file when it's ready.
MPEG Transport Stream files from digital television carry compressed audio alongside video within a packet-based error-resilient structure. Converting TS to ALAC (Apple Lossless Audio Codec) extracts the audio and re-encodes it using Apple's lossless compression, producing files that are bit-for-bit identical to the decoded source audio while being 40-60% smaller than uncompressed AIFF or WAV.
ALAC provides lossless audio quality with significantly better compression than AIFF or WAV. It plays natively on every Apple device — iPhone, iPad, Mac, Apple TV, HomePod — and integrates seamlessly with iTunes and Apple Music. If you want broadcast audio in your Apple ecosystem with no quality loss and reasonable file sizes, ALAC is the optimal choice.
FFmpeg extracts the audio PES (Packetized Elementary Stream) from the TS container, decodes the MPEG-2 Audio or AC3 source to PCM, then applies Apple's lossless compression algorithm. ALAC uses adaptive linear prediction and Rice coding to achieve ~50% compression without any data loss. The output is wrapped in an M4A container (MPEG-4 Part 14) with the ALAC codec tag, which all Apple software recognizes natively.
ALAC is mathematically lossless — the decoded audio is sample-identical to the uncompressed PCM output from the broadcast decoder. Quality is limited only by the original broadcast encoding (typically MPEG-2 Audio at 192-384 kbps or AC3 at 448 kbps). The ALAC file perfectly preserves whatever fidelity the broadcast provided.
| Device | TS | ALAC |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Native |
| iPhone/iPad | Partial | Native |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
TS to ALAC conversion delivers the best of both worlds: lossless broadcast audio extraction with Apple ecosystem compatibility and efficient file sizes.
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Alle nettlesere, alle enheter
| Egenskap | TS | ALAC |
|---|---|---|
| Fullt navn | MPEG Transport Stream | Apple Lossless Audio Codec |
| Filendelse | .ts | .m4a |
| Best egnet for | Broadcasting | Lossless |