Upload FLAC audio
Choose non-empty .flac files up to 100 MB that host FFmpeg can read and that contain audio.
FLAC to M4R audio conversion
Encode a new AAC M4R file from FLAC audio.
Add eligible FLAC files to a server-side sequential queue. Every successful item becomes a separately named, audio-only M4R download.
- AAC at 160k
- iPod muxer
- First audio stream
Processed by our self-hosted conversion engine
Supported files
FLAC in. Fast-start AAC M4R out.
FLACM4R
The route maps the first audio stream, removes video, metadata, and chapters, then uses FFmpeg’s iPod muxer to write AAC at 160k.
How it works
Write individual M4R files from FLAC
Run the fixed M4R profile
Queued jobs run one at a time; the profile maps the first audio stream and encodes AAC at 160k.
Save completed M4R files
Review output where browser support allows and download each successful audio-only M4R separately.
M4R conversion facts
An M4R encode, not a ringtone editor.
Fileverses does not trim clips, enforce duration, assess device suitability, or offer audio settings. Test the completed file in the intended destination.
Convert FLAC to M4RFLAC audio up to 100 MB
The route accepts only non-empty .flac uploads no larger than 100 MB with an FFmpeg-readable audio stream.
Fixed AAC M4R encoding
Each output is a new AAC-at-160k M4R written through FFmpeg’s iPod muxer, rather than a source stream copy.
Only first audio; no source extras
Video is excluded, source metadata and chapters are removed, and alternate audio tracks, subtitles, and attachments are not retained.
No ringtone or edit controls
There is no trim, duration rule, stream selection, bitrate, sample-rate, channel, or quality setting, and ringtone suitability is not guaranteed.
FLAC to M4R FAQ
M4R output questions
What is inside the generated M4R?+−
A successful result is an audio-only M4R with AAC encoded at 160k from the first FLAC audio stream.
Does this create or guarantee a usable ringtone?+−
No. The route only creates an M4R file; it does not trim audio, apply duration rules, or assess destination-device suitability.
Can I select another audio track?+−
No. The fixed profile maps the first audio stream only.
Does it keep FLAC tags or chapters?+−
No. Source metadata and chapters are removed, and video is excluded.
Why is the output fast-start?+−
The profile uses FFmpeg fast-start output through the iPod muxer. That does not guarantee support in every destination.
Can I convert multiple files?+−
Yes. Each submitted file is processed sequentially and receives its own completed download.
Can I set bitrate or cut the clip?+−
No. AAC at 160k is fixed and this route has no trim, bitrate, sample-rate, channel, or quality controls.