Quote:
Originally Posted by Forteen88
This page shows the presets too,
https://x265.readthedocs.io/en/master/presets.html
"psy-rd=0.35::psy-rdoq=14.65"?
I'd rather have high psy-rd value, because it is more accurate than psy-rdoq.
Quote:
|
High levels of psy-rdoq can double the bitrate which can have a drastic effect on rate control, forcing higher overall QP, and can cause ringing artifacts. psy-rdoq is less accurate than psy-rd, it is biasing towards energy in general while psy-rd biases towards the energy of the source image.
|
https://x265.readthedocs.io/en/maste...visual-options |
thanks for the link to the presets, someone may need it.
https://x265.readthedocs.io/en/master/presets.html
however it also says...
Quote:
--psy-rdoq <float>
Influence rate distortion optimized quantization by favoring higher energy in the reconstructed image. This generally improves perceived visual quality at the cost of lower quality metric scores. It only has effect when --rdoq-level is 1 or 2. High values can be beneficial in preserving high-frequency detail.
|
psy-rdoq maximum is 50, i set it to 14.65...
i tried the default settings of psy-rd=2.0::psy-rdoq=1.0 (since you didn't provide any, maybe you could?), the picture looks much worse, more flickering, looks less accurate at lower bitrates with added "detail"(noise) where there wasn't any :(
maybe at real high bitrates, 4k grain free video content (or with intentions to preserve/keep the grain), psy-rd=2.0::psy-rdoq=1.0 could maybe be better setting along with no-constrained-intra maybe aqmode=1 instead of hevc-aq for remuxing such content. however most content has unnecessary visual noise and properly removing it can decrease the file size, and improved visuals.
[EDIT: my settings (as posted at top) look better than placebo in high detail test clips, soon to be posted below]
i also forget to mention in my post that i was going for perceived quality, not accuracy. besides, isn't x264 still king of remuxing losslessly? either way, i think there needs some tweaking for remuxing "perfect" sources.
any ideas anyone?