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MP4 at a glance
MP4
MP4 grew out of the MPEG-4 and ISO Base Media File Format lineage, which helped make it both standards-based and commercially pervasive.
FLV at a glance
FLV
FLV is inseparable from the Flash era of online media, when browser plugins rather than native video elements dominated streaming video experiences.
Format comparison
| Feature | MP4 | FLV |
|---|---|---|
| File type | Video | Video |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2001 | 2002 |
| Inventor | ISO/IEC MPEG | Macromedia / Adobe |
| Status | active | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Not supported |
| Multitrack support | Not supported | Not supported |
| Camera raw data | Not supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Supported | Supported |
When to use each format
When to use MP4
- Your source file is already in MP4.
- Preserve source expectations before exporting to FLV.
- MP4 is commonly used in video workflows.
When to use FLV
- Your target workflow expects FLV.
- Improve delivery compatibility with FLV.
- FLV is commonly used in video workflows.
FAQs
Why convert MP4 to FLV?
Convert to FLV when dealing with Flash-era website archives, old courseware, or inherited streaming libraries that still preserve their media in Flash Video form.
It is useful for recovery and compatibility with historical systems.
For any new online distribution, MP4 or WebM are the correct modern targets.
What changes when converting MP4 to FLV?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting MP4 to FLV?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.