Question / Help Wich Nvenc Preset for High Quality/High File compression?

Caio Faustino

Caio Faustino

New Member
I'm getting some weird results here and if anyone could clarify. I want to make a high quality video with little compression.
I have set NVENC with 7500 bitrate.
If I use High quality preset, on a 30s video I get a file of about 25MB and some highly compressed frames that look ugly.
If I use Lossless preset, on the same 30s video I get about 300MB filesize and a beautifull video.

How can I configure OBS to give me something on the middle of that? I am aiming for a filesize of about 75MB on that 30s sample so I can still have good quality.
 
Jack0r

Jack0r

The Helping Squad
Moved to its own thread.

To reach a filesize of 75mb for a 30 second video, with an audio bitrate of 128, you could set OBS to record with nvenc at a bitrate of about 2500kbit. Is there a reason you aim for 75mb?

In general I would recommend to set a bitrate above the 7500 you used. Select the High Quality Preset. If necessary, the encoder can then use more bitrate to keep the quality up. Make sure CBR is deactivated. Files might get bigger than 75mb, depending on the content you record, but your quality should always be good. To save diskspace you could re-encode the videos to h265 later.
 
Caio Faustino

Caio Faustino

New Member
Thanks for the answer, well that is the problem I'm facing. The bitrate I set makes little to no difference on the video quality. At High Quality preset, the video I recorded with 7500 bitrate and the one I recorded with 25000 bitrate had 10 and 12 MB of size respectively, and both seemed highly compressed.

I only chose to aim for about 75 or 100MB because I thought that making a 1h video would stuff too much on my HD, and so I wanted a little bit more compression. But with my current tests I either get high quality huge size, or small size and bad quality.

I am using Windows 10 but I'm not having any bugs as far as I can see. For further information here is my latest Log
https://gist.github.com/anonymous/543537792d20c212d3f5
 
C

Cryonic

Member
Well your HDD should be big enough. If not - get a bigger one. I would keep the quality up. And what do you mean with huge?
You can always edit and encode the video later for uploading it, but you should always have a high quality local recording if you can.
 
Caio Faustino

Caio Faustino

New Member
Cryonic said:
Well your HDD should be big enough. If not - get a bigger one. I would keep the quality up. And what do you mean with huge?
You can always edit and encode the video later for uploading it, but you should always have a high quality local recording if you can.
Click to expand...

thats true and keeping the settings at Lossless could be a solution in the end, but my question is if I am in any way able to configure something in between those two qualities,
 
Caio Faustino

Caio Faustino

New Member
Also I just tested recording in Lossless preset, but it seems to use that "High 444" mode or something in the H.264/MPEG-4 AVC codec, and when I exported the file to Premier Pro it reads in black and white. On VLC it looks good.
 
R

R1CH

Forum Admin
Developer
Just add more bitrate. Non-x264 encoders need lots of bitrate to work well. Get a bigger HDD if storage becomes an issue.
 
Caio Faustino

Caio Faustino

New Member
R1CH said:
Just add more bitrate. Non-x264 encoders need lots of bitrate to work well. Get a bigger HDD if storage becomes an issue.
Click to expand...
No that is not the problem here.
These are the configs I'm using:
http://prntscr.com/84rh3e
http://prntscr.com/84rhn1
If I set the bitrate much higher it fails to load the codec.

And this is the quality I'm getting: http://prntscr.com/84rgu3
I can see the compression blocks on the top right corner. And the file size is very small.

But when I set the preset to Lossless I get a lossless quality and a huge video size, but the file gets color issues when I import it to Premiere Pro.
 
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