CRF 4K/60p h.265 ?

[Divok]

Hi,
I need advice on setting the CRF for home videos. Until now, I’ve been shooting in FHD/50p h.264 and exporting with CRF17. I’m not sure about the preset since I’ve never focused on it—it was the default in Voukoder for Adobe Premiere. Now, I’m also shooting with a Pixel 8 Pro. The videos are 4K/60p and h.265. Sometimes I shoot in HDR, which also has 10-bit color. What CRF equivalent should I choose for these two types of videos to match the original export?

I assume that CRF 17 is indistinguishable from the original, yet still saves space. I also know it's stated that h.265 can increase the CRF by 2 points while maintaining the same quality. And also by about 2 points up if I choose the preset 'Very Slow' instead of 'Medium.' However, I am unclear about what CRF set for 4K/60p h.265 or the same+10-bit

Thank you.

[LigH.de]

The goal of a constant rate factor is to (more or less) "guarantee" a maximum for a loss of quality. That should work with only little dependency on resolution or frame rate, as it calculates a difference between the input and the reconstructed output. What will differ will be the required bitrate to achieve a loss below the given threshold. What may also differ may be the kind of loss, depending on the allowed features to save bitrate, artifacts which may appear more or less obvious to your brain. IMHO, the range to "transparent quality" will be between 15 and 18 in modern psycho-visually optimized codecs (smaller CRF = less loss = more space required).

Other users may have a different opinion. Please be patient and decide after more replies.

[Divok]

OK, thank you.

[rgr]

Hi,
I need advice on setting the CRF for home videos. Until now, I’ve been shooting in FHD/50p h.264 and exporting with CRF17. I’m not sure about the preset since I’ve never focused on it—it was the default in Voukoder for Adobe Premiere. Now, I’m also shooting with a Pixel 8 Pro. The videos are 4K/60p and h.265. Sometimes I shoot in HDR, which also has 10-bit color. What CRF equivalent should I choose for these two types of videos to match the original export?

I assume that CRF 17 is indistinguishable from the original, yet still saves space. I also know it's stated that h.265 can increase the CRF by 2 points while maintaining the same quality. And also by about 2 points up if I choose the preset 'Very Slow' instead of 'Medium.' However, I am unclear about what CRF set for 4K/60p h.265 or the same+10-bit

Thank you.

Note that the "very slow" preset is really slow, so it's your choice.
As for me, for 4K you can easily increase the CRF by 2 (to 19).
Pixel records in VFR, so either you accept a high probability of duplicate frames, or you need to process the material in another program first (e.g. VDub+Avisynth). Your Pixel is probably recording in Full Range, so you also need to take into account that Premiere is seriously lacking in this area.
P.S. I tried switching from Vegas to Premiere. Premiere really sucks

[Divok]

Thank you for info. Is there any way how to take videos on Pixel 8pro CFR 60p? For example with OpenCamera? I tried set in OC 60fps, but it is still VFR(medianfo).