Import some feature of x265 into x264?

[movmasty]

x265 has separate Noise Reduction for I and P-B frames
so you could denoise more in the file, and get less denoise in display

Could this be imported in h264?

And maybe some other feature that doesnt slow encodings?

[benwaggoner]

x264 --nr just does --nr-inter from x265. So it's more a request for --nr-intra to be added to x264.

[movmasty]

And why they didnt call it --nr-inter? Would have been more clear

Using high values of --nr in x264, i noticed some artifact that would not have been there if it had not affected I frames.

[benwaggoner]

And why they didnt call it --nr-inter? Would have been more clear

Using high values of --nr in x264, i noticed some artifact that would not have been there if it had not affected I frames.
I fear it may have been my suggestion :). It originally had the x264 inter-only nr, but added an intra nr to help with grainy content, particularly at UHD resolutions. Maybe --nr should have just been identical to --nr-inter, but I can see why it's valuable to have a single combined nr filter.

I'd also be interested in seeing what could be done if chroma and luma nr could be specified differently, like --nr-inter-chroma and --nr-inter-luma. The noise characteristics of each can vary a lot with different sources.

Heck, some content could probably benefit from having --nr-inter-chroma-Cb and --nr-inter-chroma-Cr as separate values.

But I bet there is lower hanging fruit for the x265 devs to focus on :). Like getting 1.9 out the door.