CONVERT
MTS β FLAC
Fast, secure MTS to FLAC conversion. No registration required.
DRAG. DROP. DONE.
Upload any file and our engines will handle format detection automatically.
Max 100 MB Β· Free plan Β· No signup required
Convert to:
Detecting available formats...
Uploading...
Processing your file...
Setup: MTS is the AVCHD camcorder variant of the MPEG transport stream. Goal: an interchangeable FLAC. Strip a MTS down to just its FLAC audio track for playback on devices that cannot (or should not) show video. This is how most audiobook and podcast workflows start β take a MTS master, emit a FLAC distribution copy, discard the picture track. Background. MTS is the AVCHD camcorder variant of the MPEG transport stream. Destination side, FLAC is the Free Lossless Audio Codec, offering 40β60% compression with zero quality loss.
AVCHD Video
Source formatMTS (AVCHD) is a high-definition video format from Sony and Panasonic camcorders.
FLAC Audio
Target formatFLAC is an open-source lossless audio codec that compresses audio to roughly 50-60% of its original size without any quality loss. It is the preferred format for audiophiles and music archival.
Why convert MTS to FLAC
FLAC is the lingua franca of audio: car stereos, Bluetooth speakers, voice assistants and music apps all expect it. A MTS cannot be uploaded to most of those ecosystems, but the FLAC you extract today will play anywhere tomorrow.
HOW TO CONVERT
MTS β FLAC
Start the job
Upload your MTS; the pipeline auto-detects the audio codec and the best extraction strategy.
Demux to FLAC
FFmpeg pulls the audio track out of the MTS container and writes a clean FLAC.
Save the result
Click download. The video track never leaves our processing container unmodified β we only returned the audio you asked for.
Common Use Cases
Radio and broadcast
Broadcast automation systems ingest FLAC natively. Hand them a MTS and they will re-extract anyway β do it upstream with better settings.
Voice assistant training
Custom voice models want clean FLAC audio. MTS must be demuxed first; doing it here gives you control over bitrate.
Language learning loops
Learners loop short FLAC clips for shadowing. MTS files make that awkward because the video player pauses too.
Archival audio libraries
Long-term archives store FLAC separately from video masters. Extract once, keep the MTS as the pristine original.
Quality & Compatibility
Metadata such as track title, artist and chapter markers survive when the MTS carries them in a form the FLAC supports. If the source MTS lacks tagging, the FLAC will be untagged β that is not a conversion bug, it is simply the source data.
Tips for Best Results
- For spoken-word content (podcasts, lectures), 64-96 kbps is indistinguishable from higher rates and saves storage dramatically.
- For music, do not drop the FLAC bitrate below the audio bitrate of the source MTS, otherwise you introduce a second lossy stage.
- Record your extraction settings once and reuse them β consistent bitrate and sample rate across an archive makes downstream tooling happier.
Frequently Asked Questions
Frequently Asked Questions
Yes. The free tier accepts files up to 100 MB without registration, email capture or watermarks. Paid plans raise the size cap, enable batch conversions and provide a REST API for automation, but nothing on the free tier is quality-limited β the output is exactly the same as on any paid plan.
Only if the audio codec inside MTS is not directly writable into the FLAC container. When codecs match we stream-copy, producing a bit-exact FLAC. When they differ, we re-encode at a high-quality default, so the perceptual loss is tiny for anything other than lossless-to-lossless mismatches.
Uploads run over HTTPS, files are processed in isolated containers, and both the source MTS and the FLAC output are auto-deleted within two hours. No account is required, file contents are never logged, and KaijuConverter does not use uploads for AI training. The paid plan adds a signable data-processing agreement for regulated workflows.
No. The full MTS lands in our processing container, we demux the audio locally and then the container is destroyed. The video bytes never leave KaijuConverter infrastructure and auto-delete within two hours along with the original file.
Most files finish in well under a minute. Small images and documents are typically ready in a few seconds; large video or audio files scale roughly with duration. Upload speed from your network is usually the dominant factor, not server time.
Yes. The Advanced options let you set start and end times in HH:MM:SS, so you can extract a single chapter, a specific quote or a clean sample instead of the full duration of the MTS.
Related Guides
FLAC and Lossless Audio: Comparison, Conversion and When to Use It
Complete guide to FLAC and lossless audio: differences from MP3/AAC, FLAC vs ALAC vs WAV comparison, conversion with FFmpeg and Python, and when it matters.
Read guideExtract Audio from Video with FFmpeg: MP3, AAC, FLAC, and WAV
How to extract audio from any video with FFmpeg. Copy without re-encoding, convert to MP3, AAC, FLAC or WAV, handle multiple audio tracks, and batch process files.
Read guideFLAC vs ALAC vs WAV: Complete Lossless Audio Format Comparison
Compare lossless audio formats: FLAC, ALAC, WAV, AIFF, and WavPack. File size, compatibility, metadata support, and when to use each format for archiving and audiophile playback.
Read guideSecure & Private Conversion
Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 2 hours. We never read, share, or store your data.