Video compression planner
Estimate video size from resolution, frame rate, duration and CRF or bitrate, then generate an ffmpeg plan.
Runs in your browserEvery computation happens in your browser — your data never leaves this device.
Video parameters or filename
Compression plan
Shows bitrate and size estimate.
Enter video parameters to plan
Video bitrate: 0 · Estimated MB: 0
What this tool does
- Estimate compressed size
- Plan web video bitrate
Example
Input
input.mp4
Output
视频压缩码率估算 ffmpeg -i input.mp4 -c:v libx264 -crf 23 -b:v 250k -c:a aac output.mp4 分辨率 1920x1080，30 fps，时长 60s 估算视频体积：1.79 MB（音频未计入）
A local planning estimate; no file is uploaded or transcoded.
Frequently asked questions
Does it transcode?
No, it only creates a plan.
Is a larger CRF better?
Larger CRF usually means smaller files and lower quality.
Is the estimate exact?
No, content complexity changes the actual size.
Keywords：视频压缩码率CRFvideo compressionffmpeg