Convert FLV to MP4 via API

FLV (Flash Video) is an obsolete format no longer supported by browsers. Convert FLV to MP4 to preserve your video content in a modern, widely supported format.

Try it in your browser

Loading FFmpeg engine... (~31 MB)

Use the API

curl -X POST https://renderio.dev/v1/commands \
  -H "X-API-KEY: ffsk_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
  "ffmpeg_command": "-i {in_video} -c:v libx264 -crf 23 -c:a aac -movflags +faststart {out_video}",
  "input_files": {
    "in_video": "https://example.com/input.flv"
  },
  "output_files": {
    "out_video": "output.mp4"
  }
}'

Need an API key? Get your free API key to start processing files programmatically.

Common Variations

High quality archival

-i input.flv -c:v libx264 -crf 18 -preset slow -c:a aac -b:a 192k output.mp4

Downscale to 720p

-i input.flv -vf scale=-2:720 -c:v libx264 -crf 23 -c:a aac output.mp4

Fast processing

-i input.flv -c:v libx264 -preset fast -crf 25 -c:a aac output.mp4

Related Operations

Convert AVI to MP4 via API | RenderIO Convert WebM to MP4 via API | RenderIO Convert MKV to MP4 via API | RenderIO Compress Video via API | RenderIO

Need to process at scale?

Automate this with the RenderIO FFmpeg API. Process thousands of files programmatically or through no-code video automation.

Get your API key