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Convert MTS to FLAC - Extract Lossless Audio from Video

Extract pristine audio from AVCHD camcorder footage. Lossless quality preserved.

Step 1: Upload your files

You can also Drag and drop files.

Step 2: Choose format
Step 3: Convert files

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Why Extract Audio from MTS Files?

MTS files from your camcorder contain both video and audio tracks. Sometimes you only need the audio—maybe you recorded a concert, interview, or family event and want to listen without the video. Extracting to FLAC preserves every detail of the original recording.

FLAC (Free Lossless Audio Codec) compresses audio without losing any quality. Unlike MP3, which discards data to shrink files, FLAC keeps everything intact. In our testing, audio extracted to FLAC was indistinguishable from the original MTS audio stream.

How to Convert MTS to FLAC

  1. Upload your MTS file - Drag and drop or select your AVCHD video
  2. Choose FLAC output - Select FLAC as your target audio format
  3. Download your audio - Get your lossless FLAC file instantly

The entire process happens in your browser. No software installation required, no account needed.

Understanding MTS and FLAC

MTS (MPEG Transport Stream) is the video format used by AVCHD camcorders from Sony, Panasonic, Canon, and other manufacturers. These cameras record in high definition (1080i or 720p) with stereo or surround sound audio.

The audio inside MTS files is typically encoded in AC3 (Dolby Digital) or PCM format at high bitrates. When you convert to FLAC, this audio is preserved exactly as recorded—no quality loss occurs during extraction.

Format Comparison

  • MTS audio - Usually AC3 at 256-640 kbps or uncompressed PCM
  • FLAC output - Lossless compression, typically 50-70% of PCM size
  • Quality - Bit-for-bit identical to original audio stream

When to Use MTS to FLAC Conversion

Live Recordings

Recorded a concert, recital, or live performance on your camcorder? Extract the audio to FLAC for archival-quality listening. The lossless format ensures you capture every nuance of the original performance.

Interview and Speech Preservation

For oral histories, interviews, or important speeches, FLAC preserves the recording for future transcription or reference without any generational loss.

Audio Editing Projects

Need to edit audio from your video in a DAW? FLAC provides the cleanest source material. Edit, mix, and master without compression artifacts from the source file.

Archiving Family Memories

Wedding speeches, birthday songs, or a child's first words—extract these precious audio moments in lossless quality for permanent preservation.

MTS to FLAC vs Other Formats

Choosing the right output format depends on your needs:

  • FLAC - Best for archiving and editing. Lossless quality, moderate file size
  • MTS to MP3 - Better for portable devices and casual listening. Smaller files but lossy compression
  • MTS to WAV - Uncompressed audio, maximum compatibility with editing software. Largest files
  • MTS to AAC - Good balance of quality and size for Apple devices

For archival purposes where storage is not a concern, FLAC is the clear choice. You can always convert FLAC to smaller formats later without going back to the original video.

Works on Any Device

Our MTS converter runs entirely in your browser:

  • Windows, Mac, Linux, Chromebook
  • Chrome, Firefox, Safari, Edge
  • No software downloads or plugins required

Your files stay on your device throughout the conversion process. Nothing is uploaded to external servers.

Pro Tip

FLAC files from MTS extraction work directly in professional DAWs like Pro Tools, Logic, and Ableton. No re-encoding needed before editing.

Common Mistake

Converting to MP3 for archival storage. MP3 permanently discards audio data. Always archive in FLAC first, then create MP3 copies for portable use.

Best For

Extracting audio from concert recordings, interviews, or family videos where you want to preserve original sound quality permanently.

Not Recommended

Skip FLAC if you only need background audio for a video project or casual phone listening. MP3 or AAC will save storage space with minimal perceptible quality loss.

Frequently Asked Questions

MTS (MPEG Transport Stream) is a video format used by AVCHD camcorders from Sony, Panasonic, Canon, and other manufacturers. It contains high-definition video with stereo or surround sound audio.

Yes, FLAC is completely lossless. The audio extracted from your MTS file will be bit-for-bit identical to the original audio stream. No quality is lost during conversion.

FLAC preserves full audio quality while MP3 uses lossy compression that permanently removes data. Choose FLAC for archiving, editing, or when quality matters most. Choose MP3 when file size is the priority.

MTS files typically contain AC3 (Dolby Digital) audio at 256-640 kbps or uncompressed PCM audio. The exact quality depends on your camcorder's settings when recording.

Most modern Android phones support FLAC natively. iPhones require a third-party app like VLC. If compatibility is a concern, convert to MP3 or AAC instead.

Conversion typically takes seconds to a few minutes depending on your file size and device speed. The process runs locally in your browser without uploading to servers.

This conversion extracts only the audio track. Your original MTS file remains unchanged. If you need both video and audio, keep your original file.

MTS and M2TS are essentially the same format. MTS is commonly used by camcorders while M2TS is associated with Blu-ray discs. Both can be converted to FLAC using the same process.

Yes, you can upload and convert multiple MTS files in a single batch. Each file will be processed and available for download as a separate FLAC file.

MTS Conversions & Related Converters

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