Video
What is a .bdm file?
A .bdm file is an AVCHD Index File. This is a video format. Confusingly, this extension has been used by 2 different formats over the years — they're all listed below.
This extension has been used by more than one format
2 different formats have claimed .bdm over the years, so two files with the same extension aren't necessarily the same kind of thing.
How to open a .bdm file
- VLC is the answer for the vast majority of video files.
- mpv is a lightweight alternative.
The registry records this extension against AVCHD Index File, AVCHD Movie Object File, so software from that family is the most likely match.
How to convert a .bdm file
- HandBrake converts to .mp4, which plays on effectively everything.
The technical record
For archivists, developers and the merely curious: these are the PRONOM registry entries for .bdm.
| Format name | Version | MIME type | PUID |
|---|---|---|---|
| AVCHD Index File | — | — | fmt/1076 |
| AVCHD Movie Object File | — | — | fmt/1075 |