compression-high-bitrate-bars
通过
输出比输入更小
这些是这一条样本记录到的设置和字节数。
| 体积结果 | 记录值 |
|---|---|
| 预设 | smallest |
| 质量 | 20 |
| 体积目标 | 关闭 |
| 原始分辨率 | 1280×720 |
| 原始帧率 | 24 |
| 输出编码 | vp9 + opus |
| 输入字节 | 2976898 |
| 输出字节 | 149460 |
| 字节变化 | -2827438 |
如果需要更小的文件，可以再试更低分辨率、更低质量或打开体积目标，这些只是建议。导出后对比同一帧和实际字节数，再决定要不要用。
assets/video-compression/compression-high-bitrate-bars-output.webm
这次采集的技术证据
- 格式
- mp4
- 字节数
- 2976898
- SHA-256
323e12f272e3b3fe8162883e123559c32a2d89d7b6b3431d3124f3a666740204- 许可
- CC0-1.0
- 来源
- Generated CC0 lab input on 2026-10-26 with ffmpeg 6.1.1: testsrc2 1280x720, 24 fps, 2 seconds, sine 440 Hz, libx264 ultrafast CBR 12000k, AAC 128k. Original lab input, not a camera recording.
原始样本 assets/video-lab/cpk-lab-cc0-high-bitrate-bars-1280x720.mp4
实际操作
- opened /tools/video-compressor/
- uploaded cpk-lab-cc0-high-bitrate-bars-1280x720.mp4
- selected preset smallest
- set quality 20
- left target size off
- clicked #start
- clicked #save
记录到的选项
- webCodecs
- true
- preset
- smallest
- targetEnabled
- false
- quality
- 20
- keepAudio
- true
- resolution
- Original
- fps
- Original
- engineLabel
- WebCodecs
记录到的输入
- sha256
- 323e12f272e3b3fe8162883e123559c32a2d89d7b6b3431d3124f3a666740204
- bytes
- 2976898
- video
- {"codec":"h264","width":1280,"height":720,"fps":24,"bitrate":11768644,"durationSec":2,"audioCodec":"aac","audioPresent":true}
assets/video-compression/compression-high-bitrate-bars-output.webm
输出探测
- video
- {"codec":"vp9","width":1280,"height":720,"fps":24,"audioCodec":"opus","audioPresent":true}
- summary
- This download probed as vp9 with opus audio. Output is 149460 bytes and the input fixture is 2976898 bytes. The output file is smaller than the input on this clip. ffprobe duration was 2.02 seconds. Elapsed 455ms is for this environment only.
0b11fbd73e2c18d98ee7d9a9bf0733a88f1c68ea74ac9ccdb47bc54370cae7a0 · 149460
记录到的检查
- outputLargerThanInput
- false
- outputSmallerThanInput
- true
- video
- {"codec":"vp9","width":1280,"height":720,"audioCodec":"opus","audioPresent":true}
- summary
- Output is 149460 bytes and the input fixture is 2976898 bytes. The output file is smaller than the input on this clip. Elapsed 455ms is for this environment only.
- elapsedMs
- 455
- elapsedScope
- this environment only
该用例记录的限制
- Captured on 2026-10-26 in headless Chrome/156.0.8078.47 against the local Video Compressor page at commit bf34759887a62ae15fdb13404a9f2fcf6aa568b9. This case is not part of the 2026-10-02 shutter.
- ffprobe read the output duration as 2.02 seconds against a 2.00 second input. That reading is this file only.
采集时的屏幕截图
