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View Full Version : A question about lossless encoding and keyframes


phibertron
15th June 2012, 01:15
I have no need to do this, just for educational purposes

It makes senses for archival encodes or for video editing
where I see people use crf 0 or qp 0

If one was not worried about space,

would it not make further sense to also not use keyframes?

For Example:
keyint 0
min-keyint 0
scenecut 0

I would imagine this would be beneficial for greater control
of cut points when doing edits

poisondeathray
15th June 2012, 04:17
I have no need to do this, just for educational purposes

It makes senses for archival encodes or for video editing
where I see people use crf 0 or qp 0

If one was not worried about space,

would it not make further sense to also not use keyframes?

For Example:
keyint 0
min-keyint 0
scenecut 0

I would imagine this would be beneficial for greater control
of cut points when doing edits

--crf 0 or --qp 0, plus --keyint 1 is sufficient, the rest is redundant . This means intra encoding (ie. every frame is a keyframe)

If editing performance was the criterion, you might add --tune fastdecode as well

phibertron
15th June 2012, 18:46
Thanks for the feedback, much appreciated