Log in

View Full Version : 4K Disc to main movie 25gb?


DanDare1983
15th October 2025, 19:51
I have a couple of 4K UHD movies in folder format and I would like to simply make a 25gb Blu-ray encode of these. Would this be possible and would the encode play on my 4K player in 4K? Also I don't have a dedicated graphics card but I do have integrated graphics on a Intel Ultra 9 Processor 285K cpu. Would integrated graphics be OK to use as I assume encoding would take a while? Any help would be appreciated. Thank you

RetsimLegin
16th October 2025, 08:12
If you make a true BluRay encode (as in - compliant with the BD-Video standard) then it will be encoded at 1080p (HD) and not 4k (UHD). Therefore it will play in 1080p HD. That's not to say the player or screen won't upscale it back to 4k - if you have a 4k screen and player, one or other of them will.

It won't have High Dynamic Range.

Whether you will find the differences noticeable is down to you; your visual acutity, your equipment, and to what extent you are driven by objective measures (numbers and specs) vs subjective measures (what it looks like). For myself, I'd be quite happy with HD as on most material I find the 4k "upgrade" to be subtle verging on invisible.

To get 4k you would need to encode it to the 4k standard and fitting a full feature into 25g may be challenging. It may (depending on the content) introduce some compression artefact that is more visible than the loss of resolution and HDR.

Either way, you need to be prepared for a long encode time - it's something you will probably need to leave overnight at least.

jdobbs
17th October 2025, 13:39
I have a couple of 4K UHD movies in folder format and I would like to simply make a 25gb Blu-ray encode of these. Would this be possible and would the encode play on my 4K player in 4K? Also I don't have a dedicated graphics card but I do have integrated graphics on a Intel Ultra 9 Processor 285K cpu. Would integrated graphics be OK to use as I assume encoding would take a while? Any help would be appreciated. Thank youJust select the input folder, select the Intel Encoder (under SETTINGS/ENCODER), set BD Rebuilder to MOVIE-ONLY mode (under MODE), set the output size to 25GB (under SETTINGS/OUTPUT OPTIONS) and let it run. Yes, it should play in 4K on your 4K player.

By "folder format" I assume you mean a folder that holds BD a BD structure. If the input is simply an MKV or other video format, you will have to import it first.

I also assume that you want to create a movie-only disc. If you want a complete backup (with extras etc) select FULL BACKUP rather that MOVIE-ONLY under the MODE menu.

DanDare1983
20th October 2025, 18:27
Just select the input folder, select the Intel Encoder (under SETTINGS/ENCODER), set BD Rebuilder to MOVIE-ONLY mode (under MODE), set the output size to 25GB (under SETTINGS/OUTPUT OPTIONS) and let it run. Yes, it should play in 4K on your 4K player.

By "folder format" I assume you mean a folder that holds BD a BD structure. If the input is simply an MKV or other video format, you will have to import it first.

I also assume that you want to create a movie-only disc. If you want a complete backup (with extras etc) select FULL BACKUP rather that MOVIE-ONLY under the MODE menu.

I've done everything you said and when I playback on my 4K Panasonic UB-820 I'm getting green pixelation. The actual quality is fine though apart from the green pixelation.

jdobbs
20th October 2025, 21:31
I've done everything you said and when I playback on my 4K Panasonic UB-820 I'm getting green pixelation. The actual quality is fine though apart from the green pixelation.That's odd. Not sure what could cause that other than the video encoding. Try changing to One-Pass ICQ encoding (if you're using bitrate encoding), if you're already using ICQ, try switching to bitrate encoding.

DanDare1983
21st October 2025, 18:08
That's odd. Not sure what could cause that other than the video encoding. Try changing to One-Pass ICQ encoding (if you're using bitrate encoding), if you're already using ICQ, try switching to bitrate encoding.

I've just tried with One-Pass ICQ encoding choosing High Quality and BD25 setting and the green pixelation is gone. I was using One-Pass VBR encoding before and also had the quality set to Highest. I may choose highest quality again though as I notice some scenes had blockiness and lacked bitrate. I'm not sure how good the quality will be though as its a 60gb movie being put onto a 25gb disc.

jdobbs
21st October 2025, 22:12
I've just tried with One-Pass ICQ encoding choosing High Quality and BD25 setting and the green pixelation is gone. I was using One-Pass VBR encoding before and also had the quality set to Highest. I may choose highest quality again though as I notice some scenes had blockiness and lacked bitrate. I'm not sure how good the quality will be though as its a 60gb movie being put onto a 25gb disc.At least with ICQ the encoder will apply bits based more upon where they are needed (to get to the selected quality level). The only downside is that it has a slight chance of an occasional (rare) oversize. When that happens you can set a fixed ICQ value that is slightly greater than the one the prediction chose.

I personally use ICQ exclusively.

Just out of curiosity, what ICQ value did it select?

DanDare1983
22nd October 2025, 13:16
At least with ICQ the encoder will apply bits based more upon where they are needed (to get to the selected quality level). The only downside is that it has a slight chance of an occasional (rare) oversize. When that happens you can set a fixed ICQ value that is slightly greater than the one the prediction chose.

I personally use ICQ exclusively.

Just out of curiosity, what ICQ value did it select?

It selected the ICQ value 21. No pixelation on playback but when I try to skip forward the picture just freezes, takes about a minute for the video to resume.

jdobbs
22nd October 2025, 15:40
It selected the ICQ value 21. No pixelation on playback but when I try to skip forward the picture just freezes, takes about a minute for the video to resume.21 should provide a very good picture. In my testing it results in an SSIM value of 0.98144. That's roughly equivalent to running X265 with a value of 20.

Not sure why you'd have problems skipping. I haven't personally experienced that.

stonesfan129
30th October 2025, 23:13
Just FYI, you can convert these, but I don't think this software will convert HDR to SDR. I've always had to run mine through Handbrake or Vidcoder using BT.709 for the color depth, then import that file back into BD Rebuilder to burn to a BD25.

SquallMX
5th November 2025, 05:18
I've just tried with One-Pass ICQ encoding choosing High Quality and BD25 setting and the green pixelation is gone. I was using One-Pass VBR encoding before and also had the quality set to Highest. I may choose highest quality again though as I notice some scenes had blockiness and lacked bitrate. I'm not sure how good the quality will be though as its a 60gb movie being put onto a 25gb disc.

Try using software encoding (x265), it usually provides higher quality than Hardware encoding at the expense of lower encoding speed.