Transparent Video

1. Transparent Video with Alpha Channel

Tutorial: https://www.bilibili.com/video/BV1BM4m117Hi

Specifications

• Supported Format: mov

• File Size Limit: 2G 以内

• Supported Video Codec: ProRes 4444

• Supported Audio Coded: All

• Maximum Video Dimension: Do not exceed 4096 pixels on the long edge

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Export Guide

Step 1: Ensure that the exported video includes an alpha channel

⚠️ When creating a new composition in After Effects, make sure to set the background color to pure black (RGB 0, 0, 0).

Step2：Export a Video with Alpha Channel

1. Click “Composition” → “Add to Render Queue”.

1. In the Output Module, click the “Lossless” button.

Choose "Quicktime" as Format

1. In Video Output, set Channels to “RGB + Alpha.”

1. Click "Format Option", then choose “Apple ProRes 4444” as the video codec.

1. If the video contains audio, enable "Audio Output". If it does not contain audio, disable "Audio Output."

1. Click "Render" to export the .mov file, then upload it to the Kivicube platform.

   The platform will automatically process it into a Kivicube-compatible transparent video.

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2. Transparent Video Supported by Kivicube

Specifications

• Supported File Format: MP4

• File Size Limit:

  • Free: up to 30 MB

  • Starter: up to 50 MB

  • Pro: up to 200 MB

  • Enterprise: up to 200 MB

• Supported Video Codec: H.264

• Supported Audio Codec: LC-AAC

• Maximum Video Dimension: Do not exceed 1920 px on the long edge. - Recommended Maximum Long Edge: 1560 px - Video Dimensions Must Not Be Odd Numbers (Width and height must both be even.)

• Please ensure there are no full-frame pure-black scenes in the video, especially at the beginning.

• Video Level must not exceed: 5.2

• Video Profile must not exceed: High

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Understanding Transparent Video

💡 Kivicube transparent video does not refer to videos that contain an alpha channel (such as MOV/AVI files with embedded alpha). Instead, it is a special format that achieves transparency through a different method.

Download Sample File (Source: Adobe Character Animator — Example: Lower-Limb Rehabilitation Robot) Robot.mp4

Note: Before uploading a transparent video, the file must be formatted as shown below, with the video split into left and right sections.

• The entire video uses a pure black background.

• Left Half:

  • Transparent areas of the source video → pure black

• Right Half:

  • Transparent areas → pure black

  • Non-transparent areas → pure white

After the video is processed into a transparent video (its width will be doubled), please ensure that it still meets the required size specifications.

How to Create Transparent Video

Tutorial: https://www.bilibili.com/video/BV14u4y1A7C8

Download ShanaEncoder：https://shana.pe.kr/shanaencoder_download

Tips

How to show the button "T"?

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FAQ

Glow Effects Turn Black

• When intermediate files exported from After Effects (AE) appear incorrect on another user’s AE—such as glow effects turning dark, it is likely caused by version differences or platform differences (macOS vs Windows). To avoid compatibility issues, we recommend using an image sequence as the intermediate format.

  Known issue:

  A MOV file exported from AE 2020 v17.0.1 may cause glow effects to appear black when creating transparent videos in AE on certain Windows devices.

Choosing an Appropriate Video Resolution

• Full-Screen Display: Recommended short edge: 720 px (long edge scaled proportionally)

• Non–Full-Screen Display: Estimate based on the intended display size.

Example: If the video is meant to occupy half the screen width, the source video width can be set to 360 px.

The operation is not supported

❗ The error “The operation is not supported.” usually occurs when:

• The Video Level is higher than 5.2, or

• The Profile is higher than High.

• Make sure the long edge of the video does not exceed 1920 px.

• Use the recommended conversion tool and set the Level to Auto

  (reference: https://www.yuque.com/kivicube/manual/alpha-video#XsJya).