Video conversion
Convert FLV to FLAC
Updated Jul 2026
FLV is an old video container built for Flash-based web players, and FLAC is a lossless audio format used for archiving music. To convert FLV to FLAC, pull the audio track out of the video and save it as a standalone FLAC file. Doing this on your own computer means the video never has to be uploaded anywhere to get the sound out of it.
- Extension
- .flv
- Type
- Video
- Typically
- Legacy web video
- Compression
- Lossy
- Extension
- .flac
- Type
- Audio
- Typically
- Lossless music
Convert FLV to FLAC on your own computer. Nothing uploads.
How to convert FLV to FLAC
- Open Morphjet and drag in the FLV file, or a whole folder of them, if you're pulling audio from several videos at once.
- Choose FLAC as the output format. Morphjet extracts the audio track and drops the video.
- Convert. The FLAC file is written next to your original, and nothing leaves your machine.
FLV vs FLAC: what actually changes
| FLV | FLAC | |
|---|---|---|
| Contains | Video and audio together | Audio only |
| Quality | Audio track is usually already compressed and lossy | Lossless from this point forward, but can't restore what FLV already discarded |
| File size | Larger, includes video | Smaller than the source video, larger than a compressed audio file |
| Compatibility | Mostly obsolete, tied to old Flash-era web players | Widely supported by music players and software on Mac and Windows |
| Metadata | Rarely carries music tags | Can hold title, artist, and album tags once set |
When to convert, and when not to
Convert FLV to FLAC when you have an old Flash video and only want the audio, saved in a format that won't degrade further if you edit or re-save it.
If the FLV's audio track is already a compressed format like MP3 or AAC, converting to FLAC won't bring back quality that's already gone, so don't expect it to sound better than the source, just more stable going forward.
Why not just use an online converter?
Pulling audio out of a video usually means uploading the file to some website's server and hoping they delete it afterward. That's a strange amount of trust to extend for a task this small. Converting on your own computer keeps the video, and whatever's in it, on your machine the whole time.
Questions
Will converting FLV to FLAC improve the audio quality?
No. FLAC is lossless going forward, but it can't restore detail that was already lost when the audio was originally compressed inside the FLV. It just stops any further quality loss.
Why would I extract audio from an FLV as FLAC instead of MP3?
FLAC is a better choice if you plan to edit, re-encode, or archive the audio, since it won't lose any more quality on future saves. If you just want a small file to play back, a compressed format is usually enough.
Does the FLAC file keep song info like title or artist?
FLV files rarely carry proper music tags, so there's usually nothing to carry over automatically. You can add title, artist, and album tags to the FLAC afterward.
Can I convert FLV to FLAC without uploading the video?
Yes. A desktop app like Morphjet extracts the audio and converts it on your own computer, so the file never has to leave your machine or pass through anyone else's server.
Can I still play the video part after converting to FLAC?
No. FLAC only holds audio, so converting this way keeps the sound and drops the video entirely. Keep the original FLV if you need the picture too.
Morphjet converts FLV, FLAC, and 1,800+ other formats, all on your machine. Launching this July.