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MD at a glance
MD
Markdown was created in 2004 by John Gruber with Aaron Swartz, but the later CommonMark effort became important because the original syntax description was too ambiguous to keep implementations aligned.
HDV at a glance
HDV
JVC introduced HDV in 2003, recording MPEG-2 compressed HD video on standard MiniDV cassettes. Two profiles emerged: HDV 720p (JVC) and HDV 1080i (Sony and Canon), each trading resolution and frame structure.
Format comparison
| Feature | MD | HDV |
|---|---|---|
| File type | Document | Video |
| Extensions |
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| MIME type |
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| Created year | 2004 | 2003 |
| Inventor | John Gruber and Aaron Swartz | JVC, Sony, Canon, Sharp (HDV consortium) |
| Status | active | legacy |
| Primary use cases |
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When to use each format
When to use MD
- Your source file is already in MD.
- Preserve source expectations before exporting to HDV.
- MD is commonly used in document workflows.
When to use HDV
- Your target workflow expects HDV.
- Improve delivery compatibility with HDV.
- HDV is commonly used in video workflows.
FAQs
Why convert MD to HDV?
HDV tape capture and digitization, prosumer HD archive conversion, and migration of HDV camcorder footage to modern editing formats.
What changes when converting MD to HDV?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting MD to HDV?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.