Captured Video Has No Keyframes

[Bikspk]

More exactly, I guess it has all frames marked as keyframes.

I'm capping with Huffyuv compression and getting no keyframes at all. I used to get keyframes every 5 frames but alas that isnt' happening now. Is it because of the compression I'm using?

[Si]

I used to get keyframes every 5 frames but alas that isnt' happening now. Is it because of the compression I'm using?
Yes.
All uncompressed and most (if not all) lossless compression will have a keyframe every frame.

Some compressed formats e.g MJPEG will also use a keyframe every frame.

A keyframe is a frame that can be decoded without reference to any other frame.

Highly compressed formats, MPEG and DivX use keyframes interspersed with non-keyframes. To decode the non-keyframes, the decoder must have information from the surrounding keyframes.


regards
Simon

[Bikspk]

Thanks Simon - I did some more reading and understand a bit more now. I guess my early captures must have been mpeg encoded.