Looked at the docs real quick and it should be just a matter of setting correct values in the initialization struct. The question is if its possible to do with a patch.
https://docs.nvidia.com/video-technologies/video-codec-sdk/11.1/nvenc-video-encoder-api-prog-guide/index.html

Also this is the example code they're using in the actual game for reference:
https://github.com/NVIDIA/video-sdk-samples/blob/master/Samples/NvCodec/NvEncoder/NvEncoder.cpp

Nice patch! Here's something to control the values set here. Lower values seem to result in better quality video.

// 2024-08-26 (LDJ-010)
{
    type: "number",
    name: "Set Video Recording QP InterP",
    tooltip: "Lower values increase quality at the cost of file size",
    offset: 0x54F9EA,
    size: 4,
    min: 0,
    max: 99,
},
{
    type: "number",
    name: "Set Video Recording QP InterB",
    tooltip: "Lower values increase quality at the cost of file size",
    offset: 0x54F9F2,
    size: 4,
    min: 0,
    max: 99,
},
{
    type: "number",
    name: "Set Video Recording QP Intra",
    tooltip: "Lower values increase quality at the cost of file size",
    offset: 0x54FA08,
    size: 4,
    min: 0,
    max: 99,
},

I'd like to see the video quality patches in another PR, but maybe experiment a bit and find some good sets of values? Otherwise I expect idiots are just gonna set everything to 0 and be shocked that they're producing multi-gig files.

@aixxe Pls see if you can also increase the 160kbps audio bitrate 😅

@aixxe Pls see if you can also increase the 160kbps audio bitrate 😅

bm2dx.dll+A027EF - 48 C7 44 24 40 A0000000 - mov qword ptr [rsp+40],000000A0 { 160 }

Only briefly tested, but swapping A0 00 to 40 01 seems to work for 320kbps.

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 17 s 205 ms
Bit rate mode                            : Variable
Bit rate                                 : 320 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 44.1 kHz
Frame rate                               : 43.066 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 672 KiB (18%)
Encoded date                             : 2024-10-30 21:59:12 UTC
Tagged date                              : 2024-10-30 21:59:12 UTC

Some values seem to freeze or crash the game though, e.g. at 500 it just gets stuck and uses 100% CPU

Damn, I actually tried this previously and the crash happens with any values other than 160 for me

(using ASIO4ALL lol)