AV1

516 readers

1 users here now

Community for AV1 video codec

founded 1 year ago

MODERATORS

DominicHillsun

Are we quantifying the fidelity of AV1 right? (self.av1)

submitted 10 months ago by b1tstremist0 to c/av1

3 comments fedilink hide all child comments

I've have been pondering about it for some time now and there is a reason for it.

When I compare my animated encodes frame by frame, I see that some frames come out with blurry mess but others come out better than HEVC at equivalent quality. So am I supposed to compare not still frames but frames in motion to quantify the fidelity in AV1? Or is that an area where the encoder still need improvements?

I've also experimented with temporal filtering on and off, sometimes it looks better, other times it butchers the fidelity.

top 3 comments

sorted by: hot top controversial new old

[–] [email protected] 2 points 10 months ago (1 children)

It is important to consider that a large part of encoding fidelity is the encoder used, not the encoder format. Are you referring to svt here, or some gpu hardware encoder?

[–] b1tstremist0 2 points 10 months ago

I'm refering to svt.

[–] [email protected] 2 points 9 months ago

I've had this blurry or blocky mess with the previous versions of SVT on keyframes. I had to disable temporal filtering (enable-tf=0). With the current version I don't need to do that any more.

I'm unsure if that was a bug in svt or if others just considered it normal or if it was because I don't use av1an. Or if it's what you are experienced but I don't get any messy frames any more. At least not with preset 6 or below.