A frame is a static image that forms the sequence of a video. When it is played together with the rest of the frames, it creates the movement that viewers can observe in the fragment. We can identify two main types of frames:
- Analog frames. They come from a film, and they are physical frames, generating the movement by passing through a projector.
- Digital frames. Through a software that incorporates a codec, these are encoded to generate digital videos. A digital frame can be a transformation of other existing frames, or a complete image.
On the other hand, it is also important to know the frame categories most commonly used by the main video codecs:
- Predictive coded images (B-Frames). They allow splitting frames into several chunks, or displaying previous and future frame changes.
- Intra-coded images (I-Frames). Complete images, similar to a PNG.
- Predictive coded images (P-Frames). Displays, exclusively, the relative changes produced in previous frames.