Convert MPEG Transport Stream (.ts) to MPEG-4 Audio (.m4a) 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.
Transport Stream files from digital television multiplex several elementary streams — video, audio, subtitles, and data — into a single packet-based container. Converting TS to M4A extracts the audio portion and wraps it in the MPEG-4 Part 14 audio container, producing AAC-encoded files that integrate natively with iTunes, Apple Music, and every Apple device while supporting rich metadata, chapters, and album art.
M4A is Apple's preferred audio container for AAC content — it is what iTunes Store, Apple Music, and Apple Podcasts use natively. When you need broadcast audio in the Apple ecosystem with proper metadata support, gapless playback, and chapter markers, M4A is the correct format. It also supports ALAC lossless encoding within the same container.
FFmpeg reads the TS stream, identifies audio PIDs through PAT/PMT parsing, and decodes the broadcast audio (MPEG-2 Audio, AC3, or existing AAC). The PCM output is encoded as AAC-LC (or HE-AAC for lower bitrates) and muxed into an M4A container (technically an MP4 file with only audio tracks). If the source is already AAC, the stream can be copied without re-encoding. The M4A container supports iTunes-compatible metadata atoms (udta, ilst) for title, artist, album, and cover art.
At 192-256 kbps AAC-LC, the output is audibly transparent for the vast majority of listeners. The quality ceiling is set by the broadcast source — MPEG-2 Audio at 256 kbps or AC3 at 448 kbps. M4A at equivalent bitrates sounds noticeably better than MP3 due to AAC's superior psychoacoustic model.
| Device | TS | M4A |
|---|---|---|
| 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 M4A conversion produces Apple ecosystem-native audio files with rich metadata support, ideal for building organized audio libraries from broadcast recordings.
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Hoạt động mọi nơi
| No |
8MB free, 50MB Nitro
Mọi trình duyệt, mọi thiết bị
| Tính năng | TS | M4A |
|---|---|---|
| Tên đầy đủ | MPEG Transport Stream | MPEG-4 Audio |
| Phần mở rộng | .ts | .m4a |
| Phù hợp nhất cho | Broadcasting | Better than MP3 |