What happens when you convert FLV to MP4
| Inside a typical FLV | H.264 or Sorenson Spark video with AAC or MP3 audio |
|---|---|
| Copy without re-encoding | Sometimes: it depends on the codec inside your file, and Smart mode checks this automatically |
| When re-encoded | H.264 video with AAC audio |
| Opens in | every phone, browser, TV, editor and social network |
Sizes are typical values; your files will vary with content and settings.
FLV Flash Video
FLV was the Flash Player video format behind early YouTube. Flash is gone, so FLV files now need converting before modern devices will play them.
FLV converterMP4 MPEG-4 Part 14
MP4 is the universal video container. With H.264 video and AAC audio it plays on every phone, browser, smart TV and social network, which makes it the safest choice for sharing.
MP4 converterHow to use the FLV to MP4 Converter
- 1
Choose a FLV file or drop it onto the page.
- 2
Review the video options. The defaults suit most files.
- 3
Click Convert and download your MP4 when processing finishes.
Why convert FLV to MP4?
FLV files are leftovers from the Flash era: old video downloads, game captures and livestream archives. No modern browser or phone plays FLV. Choose MP4 to upload to social media, send in a chat app or play on any phone and TV.
Frequently asked questions
Will the MP4 lose quality?
Both formats are lossy, so converting re-encodes the data once more. Using a high quality setting keeps the generational loss very small. Avoid converting the same file back and forth repeatedly.
Does converting FLV to MP4 re-encode the video?
Sometimes: it depends on the codec inside your file, and Smart mode checks this automatically. A typical FLV contains H.264 or Sorenson Spark video with AAC or MP3 audio. Otherwise the result is H.264 with AAC audio.
Questions about privacy, file-size limits or conversion speed are answered in the general FAQ.