Stripping an MKV down to FLV serves legacy RTMP streaming stacks that predate MP4 delivery and read only Flash Video. Expect losses beyond the re-encode itself: FLV has no room for MKV's subtitle tracks, chapters, or extra audio languages.
Convert MKV to FLV – Free Online MKV to FLV Converter
Why convert MKV to FLV?
- Keep a still-running RTMP pipeline — an old Wowza or Red5 install from its Flash-only years — supplied with content until it is decommissioned.
- Convert source material for old JW Player or Flowplayer sites that never left their Flash builds.
- Meet a contractual delivery spec, written long ago, that names FLV explicitly.
Tip: Pick one audio track before converting — FLV holds a single video and single audio stream, so multi-language MKVs must be flattened, and soft subtitles survive only by burning them into the picture.
How to convert MKV to FLV
- Upload your MKV file using the area above.
- FLV is preselected as the target format.
- Click Start and wait for the conversion to finish.
- Download your converted FLV file.