How to convert a .BDM file online
Three steps, all tab.
Open your file
Drop your .BDM file and every video, audio and subtitle track inside is listed with its codec, resolution, frame rate and language.
Preview
See frames from across your .BDM file before you convert, even when your browser can't play the codec inside.
Convert
Pick MP4, WEBM or MP3, or repack to MKV without re-encoding. Play the result right here, then download it.
What is a .BDM file?
Everything worth knowing about AVCHD Information File (BDMV Index).
A BDM file is a tiny index file that AVCHD camcorders (Sony, Panasonic, Canon) create alongside your video clips. It holds no video itself. To access your footage, import the entire AVCHD folder into software like DaVinci Resolve or Sony Catalyst Browse, and play the actual video clips (.mts/.m2ts) with VLC.
Programs that open .BDM files
- Windows
- VLC media player, PowerDVD, DaVinci Resolve, PlayMemories Home / Catalyst (Sony), Roxio Creator NXT
- macOS
- VLC media player, Catalyst Browse (Sony), DaVinci Resolve, Roxio Toast
| Full name | AVCHD Information File (BDMV Index) |
|---|---|
| Developer | Panasonic & Sony (AVCHD specification) |
| First released | AVCHD format, 2006 (Sony & Panasonic) |
| Category | Audio & Video |
| MIME type | application/octet-stream |
| Signature | 49 4E 44 58 30 31 30 30 ("INDX0100" - INDEX.BDM (index file)) |
Related viewers
Other free tools to open and preview your files.
Is my .BDM file uploaded to a server?
No. Your .BDM file is converted for you. The converted file is created in memory,.
Why is conversion slower than desktop software?
Browsers give web pages a single CPU core for this kind of work and no hardware video encoder. Short clips convert in seconds; for long 4K films a desktop app like HandBrake is faster. Use Start and Length to convert just the part you need.
Which output format should I pick?
MP4 plays on every phone, TV and browser. WEBM is an open format that's great for the web. MP3 keeps only the sound. MKV (no re-encode) is instant and lossless, but only changes the container.
Can I keep all audio tracks and subtitles?
The MKV (no re-encode) option copies every track as-is. MP4 and WEBM keep the first video and audio track, which is what most players use.
Why can't some files be converted?
Files protected with DRM (for example purchased iTunes .m4p songs or some .wmv rentals) are encrypted. We can show what's inside, but nobody can convert them without the key.
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