Convert H.265 to H.264 via API

While H.265 offers better compression, H.264 remains the most universally supported codec. Convert HEVC content back to H.264 for maximum compatibility across all devices and platforms.

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 -preset medium -c:a copy {out_video}",
  "input_files": {
    "in_video": "https://example.com/input.mp4"
  },
  "output_files": {
    "out_video": "output.mp4"
  }
}'

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

Common Variations

Visually lossless quality

-i input.mp4 -c:v libx264 -crf 18 -preset slow -c:a copy output.mp4

Web-optimized with faststart

-i input.mp4 -c:v libx264 -crf 23 -movflags +faststart -c:a aac output.mp4

Baseline profile for older devices

-i input.mp4 -c:v libx264 -profile:v baseline -level 3.0 -crf 23 -c:a aac output.mp4

Related Operations

Convert H.264 to H.265 (HEVC) via API | RenderIO Compress Video via API | RenderIO Convert MP4 to WebM via API | RenderIO Convert MP4 to AV1 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.

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