Smart crop landscape video to 4:3

Upload a 16:9 video and export a subject-aware 4:3 MP4 with Qwen focus detection.

Click to upload or drop a video file

Supports MP4, MOV, MKV, WebM, MPEG, MPG, 3GP, 3GPP

Up to 2 GB per file

Source video up to 20 minutes

Processing runs on this page — don't leave while it's running, or the task is cancelled.

Fixed 4:3 smart output

The target ratio is preset to 4:3 on this page.

  1. 01

    Upload video

    Choose a 16:9 source file.

  2. 02

    Run smart crop

    The page locks 4:3 as the target aspect.

  3. 03

    Download

    Preview and download the 4:3 result.

Built for these real workflows

01

Video cover design

02

Social creative

03

Key visual extraction

Continue with the next step

Smart Aspect Ratio CropBilibili Video ResizerAI Video Editor

Frequently asked questions

Does it track the subject?

Yes. This page uses AI focus detection.

Start using Smart 4:3 Video Crop

Provide the input and essential settings above. Your result stays in the current tool workflow.

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