CODEWITHSUNDEEP
encodingdecodingvideo-encoding
holzkohlengrill
holzkohlengrill

Reputation: 1222

Relation between size and video quality of I, B and P frames

Could one make some general assumptions about size and perceived quality with regards to I, B and P frames.

My first presumption would be something like:

Quality(I) > Quality(B) > Quality(P)

and

Size(I) > Size(B) > Size(P)

By Size I mean the frame size in bytes.

Let's keep it simple and consider one slice per frame.

Upvotes: 0

Views: 217

Answers (1)

szatmary
szatmary

Reputation: 31110

Generally speaking I is larger than P is larger than B. This does not need to be true, but generally is.

Now, you can not compare "quality" between the types. A P frame has only stores the differences between itself and it reference(s). A decoded P frame may improve the fadility of its reference, or it may reduce it depending on the information delta, and how may bits were used to encode that information.

Upvotes: 1

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