在输出视频的时候需要选择non-24bits/pixels，可以输出纯白色背景的视频，如果选择Microsoft 解码器，即使选择白色背景，输出的视频背景仍然是灰色的。
ABAQUS cannot output video with pure white background
When outputting video, you need to select non-24bits / pixels, which can output videos with a pure white background. If you select the Microsoft decoder, the output video background is still gray even if you select a white background.