Okay, here's what happens:

`Calulcating file size with bitrate: 5577kbs, speed: 172.55fps`

Updating progress (assumed length: 1442.11s): FPS: 172.55, Bitrate: 5577, Percent: 99.9341, RestTime: 00:00:00, EstimatedSize: 958.76

Length is correct, bitrate is read correct.

So the problem must be with the size calculation.

Hybrid assumes the bitrate is in kilo bit per second.

`QString::number(bitrate * 1000.0 / 8.0 / 1024.0 / 1024.0 * m_currentLength, 'f', 2);`

* 1000 to get to bit per second

/ 8 to get to byte per second

/1024 to get to kilo (=1024 since we want to go for file size not data rate) byte per second

/ 1024 to get to mega (=1024*1024) byte per second

* 1442.11s to get to mega byte.

this seems correct to me.

taking the file size 4618.59 MB

/ 1442.11s to get to mega byte per second

* 1024 to get to kilo byte per second

* 1024 to get to byte per second

* 8 to get to bit per second

/1000 8 to get to kilo (= 1000) bit per second

gives = 50 478 kBit/s

That's nearly a factor 10 away from what was reported.

So either I overlook something here or this isn't Hybrids fault by a bug in NVEncC.

Seeing that I thought may be NVEncC switched to reporting in 'kilo byte per second', but then it should be wrong on my system too.

So I just did another test here:

`Updating progress (assumed length: 269.242s): FPS: 707.84, Bitrate: 7284, Percent: 99.0808, RestTime: 00:00:00, EstimatedSize: 233.79`

is what Hybrid predicted and

`encoded 32237 frames, 706.92 fps, 7269.07 kbps, 232.79 MB`

encode time 0:00:45, CPU: 4.4, GPU: 28.0, VE: 64.8, GPUClock: 1837MHz, VEClock: 1664MHz

frame type IDR 27

frame type I 27, total size 1.48 MB

frame type P 32210, total size 231.31 MB

ist the output on my system.

-> The calculation of Hybrid is correct and matches the prediction of NVEnc.

I used the same settings as you:

`NVEnc --y4m -i - --fps 120.000 --codec h265 --profile main10 --level auto --tier high --sar 1:1 --lookahead 16 --output-depth 10 --vbrhq 7200 --max-bitrate 240000 --gop-len 0 --ref 3 --bframes 0 --no-b-adapt --mv-precision Q-pel --preset default --colorrange limited --colormatrix bt470bg --cuda-schedule sync --keyfile GENERATED_KEY_FILE --output "E:\test.265"`

I also double checked that the dev version comes with the same nvencc version I used.

No real clue why this is happening on your system.

My guess atm. is that something on your system is interfering with NVEncC bitrate reporting.

-> try whether this changes is you disable any antivirus&co software on your system.

Cu Selur