Has B Frame
In the majority of video files, a meta-information known as Has B Frames may be seen. It is related to the compression of video and the compression of the frames in the video. Different types of frames are able to be used as an algorithm to compress the video. One of them is able to handle so-called B-frames. So, the metadata of Has B Frames informs us whether this particular algorithm was used for the video.
A B-frame is an image that is coded bidirectionally. It makes use of image data from both the preceding and next frames. Because all of these data are used, the b-frame algorithm usually has a higher compression rate.