Core Concepts: Alpha Channel & File Formats
When you request a transparent background video, we add an Alpha Channel to the video file. This channel stores transparency information, making all areas of the video completely transparent except for the digital avatar itself.- Use Cases:
- Seamlessly overlaying the digital avatar onto another video clip in video editing software (e.g., Adobe Premiere, Final Cut Pro).
- Placing the digital avatar video on a top layer in web development to interact with the content below.
- File Format: The standard MP4 format does not typically support an Alpha channel for transparency. Therefore, transparent background videos will be provided in
.webm
or.mov
format. Please ensure your player or editing tool supports these formats. - Asynchronous Processing: Like all video creation tasks, this process is asynchronous.
Create Talking Avatar Video
Use the Create Talking Avatar Video API to control the output format by selecting the desired video specification with thescreen_style
parameter. This parameter controls the background style, allowing you to choose between videos with a background, green screen videos, or videos with a transparent background.
Please note: If you need to output a WebM video with a transparent channel, please set the caption
to false; otherwise, the WebM video cannot be generated.
Please refer to the Create Talking Avatar Videos for more details and refer to the next section for obtaining the avatar_id and voice_id.