Although there are some video formats that support their own poster frame feature, such as MPEG -4, this provides an alternative solution that can work independently of the video format.

• 尽管有一些视频格式的支持，他们自己的宣传海报框的特点，如mpeg-4，这提供了一种替代解决方案，可独立开展工作的视频格式。