Voukoder (NVENC) and 4 ReFrames error

Adobe + Voukoder+NVENC.

Encodes without errors with standard parameters (1 ReFrames) (screenshots 1, 2, 2-1). When you enable additional parameters - 4 ReFrames and B-Frames - an error pops up (screenshots 3,4). What is the reason?

Vouk,

[19:27:39] =============================================

[19:27:39] Voukoder 8 (8.0.124)

[19:27:39] by Daniel Stankewitz

[19:27:39] ---------------------------------------------

[19:27:39] Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz

[19:27:39] 12 logical cores

[19:27:39] 16323 MB system memory

[19:27:39] Display #0 on: NVIDIA GeForce GTX 760

[19:27:39] ---------------------------------------------

[19:27:39] ---------------------------------------------

[19:27:39] Export started

[19:27:39] ---------------------------------------------

[19:27:39] Filename: E:\Encode\test6.mp4

[19:27:39] Application: Voukoder (Adobe Premiere)

[19:27:39] - Video -------------------------------------

[19:27:39] Frame size: 1920x1080

[19:27:39] Pixel aspect: 1:1

[19:27:39] Timebase: 1001/24000 (23.98 fps)

[19:27:39] Interlaced: No

[19:27:39] Encoder: h264_nvenc

[19:27:39] Options: 2pass=1 _computeCapability=3.0 _pixelFormat=yuv420p b=23000000 bf=4 bufsize=78125000 coder=cabac cq=0 gpu=0 level=4.1 maxrate=62500000 preset=slow profile=high rc=vbr refs=4

[19:27:39] Side data: <none>

[19:27:39] Filters: <none>

[19:27:39] Passes: 1

[19:27:39] Color range: unknown

[19:27:39] Color space: unknown

[19:27:39] Color primaries: unknown

[19:27:39] Color transfer: unknown

[19:27:39] - Audio -------------------------------------

[19:27:39] Timebase: 1/48000

[19:27:39] Channels: 2

[19:27:39] Encoder: aac

[19:27:39] Options: _sampleFormat=fltp b=256000 profile=aac_main

[19:27:39] Side data: <none>

[19:27:39] Filters: <none>

[19:27:39] ---------------------------------------------

[19:27:39] Opening codec: h264_nvenc with options: 2pass=1|b=23000000|bf=4|bufsize=78125000|coder=cabac|cq=0|gpu=0|level=4.1|maxrate=62500000|preset=slow|profile=high|rc=vbr|refs=4

[19:27:39] FFmpeg: Loaded lib: nvcuda.dll

[19:27:39] FFmpeg: Loaded sym: cuInit

[19:27:39] FFmpeg: Loaded sym: cuDeviceGetCount

[19:27:39] FFmpeg: Loaded sym: cuDeviceGet

[19:27:39] FFmpeg: Loaded sym: cuDeviceGetAttribute

[19:27:39] FFmpeg: Loaded sym: cuDeviceGetName

[19:27:39] FFmpeg: Loaded sym: cuDeviceComputeCapability

[19:27:39] FFmpeg: Loaded sym: cuCtxCreate_v2

[19:27:39] FFmpeg: Loaded sym: cuCtxSetLimit

[19:27:39] FFmpeg: Loaded sym: cuCtxPushCurrent_v2

[19:27:39] FFmpeg: Loaded sym: cuCtxPopCurrent_v2

[19:27:39] FFmpeg: Loaded sym: cuCtxDestroy_v2

[19:27:39] FFmpeg: Loaded sym: cuMemAlloc_v2

[19:27:39] FFmpeg: Loaded sym: cuMemAllocPitch_v2

[19:27:39] FFmpeg: Loaded sym: cuMemsetD8Async

[19:27:39] FFmpeg: Loaded sym: cuMemFree_v2

[19:27:39] FFmpeg: Loaded sym: cuMemcpy

[19:27:39] FFmpeg: Loaded sym: cuMemcpyAsync

[19:27:39] FFmpeg: Loaded sym: cuMemcpy2D_v2

[19:27:39] FFmpeg: Loaded sym: cuMemcpy2DAsync_v2

[19:27:39] FFmpeg: Loaded sym: cuGetErrorName

[19:27:39] FFmpeg: Loaded sym: cuGetErrorString

[19:27:39] FFmpeg: Loaded sym: cuCtxGetDevice

[19:27:39] FFmpeg: Loaded sym: cuDevicePrimaryCtxRetain

[19:27:39] FFmpeg: Loaded sym: cuDevicePrimaryCtxRelease

[19:27:39] FFmpeg: Loaded sym: cuDevicePrimaryCtxSetFlags

[19:27:39] FFmpeg: Loaded sym: cuDevicePrimaryCtxGetState

[19:27:39] FFmpeg: Loaded sym: cuDevicePrimaryCtxReset

[19:27:39] FFmpeg: Loaded sym: cuStreamCreate

[19:27:39] FFmpeg: Loaded sym: cuStreamQuery

[19:27:39] FFmpeg: Loaded sym: cuStreamSynchronize

[19:27:39] FFmpeg: Loaded sym: cuStreamDestroy_v2

[19:27:39] FFmpeg: Loaded sym: cuStreamAddCallback

[19:27:39] FFmpeg: Loaded sym: cuEventCreate

[19:27:39] FFmpeg: Loaded sym: cuEventDestroy_v2

[19:27:39] FFmpeg: Loaded sym: cuEventSynchronize

[19:27:39] FFmpeg: Loaded sym: cuEventQuery

[19:27:39] FFmpeg: Loaded sym: cuEventRecord

[19:27:39] FFmpeg: Loaded sym: cuLaunchKernel

[19:27:39] FFmpeg: Loaded sym: cuLinkCreate

[19:27:39] FFmpeg: Loaded sym: cuLinkAddData

[19:27:39] FFmpeg: Loaded sym: cuLinkComplete

[19:27:39] FFmpeg: Loaded sym: cuLinkDestroy

[19:27:39] FFmpeg: Loaded sym: cuModuleLoadData

[19:27:39] FFmpeg: Loaded sym: cuModuleUnload

[19:27:39] FFmpeg: Loaded sym: cuModuleGetFunction

[19:27:39] FFmpeg: Loaded sym: cuModuleGetGlobal

[19:27:39] FFmpeg: Loaded sym: cuTexObjectCreate

[19:27:39] FFmpeg: Loaded sym: cuTexObjectDestroy

[19:27:39] FFmpeg: Loaded sym: cuGLGetDevices_v2

[19:27:39] FFmpeg: Loaded sym: cuGraphicsGLRegisterImage

[19:27:39] FFmpeg: Loaded sym: cuGraphicsUnregisterResource

[19:27:39] FFmpeg: Loaded sym: cuGraphicsMapResources

[19:27:39] FFmpeg: Loaded sym: cuGraphicsUnmapResources

[19:27:39] FFmpeg: Loaded sym: cuGraphicsSubResourceGetMappedArray

[19:27:39] FFmpeg: Loaded sym: cuDeviceGetUuid

[19:27:39] FFmpeg: Loaded sym: cuImportExternalMemory

[19:27:39] FFmpeg: Loaded sym: cuDestroyExternalMemory

[19:27:39] FFmpeg: Loaded sym: cuExternalMemoryGetMappedBuffer

[19:27:39] FFmpeg: Loaded sym: cuExternalMemoryGetMappedMipmappedArray

[19:27:39] FFmpeg: Loaded sym: cuMipmappedArrayGetLevel

[19:27:39] FFmpeg: Loaded sym: cuMipmappedArrayDestroy

[19:27:39] FFmpeg: Loaded sym: cuImportExternalSemaphore

[19:27:39] FFmpeg: Loaded sym: cuDestroyExternalSemaphore

[19:27:39] FFmpeg: Loaded sym: cuSignalExternalSemaphoresAsync

[19:27:39] FFmpeg: Loaded sym: cuWaitExternalSemaphoresAsync

[19:27:39] FFmpeg: Loaded lib: nvEncodeAPI64.dll

[19:27:39] FFmpeg: Loaded sym: NvEncodeAPICreateInstance

[19:27:39] FFmpeg: Loaded sym: NvEncodeAPIGetMaxSupportedVersion

[19:27:39] FFmpeg: Loaded Nvenc version 11.0

[19:27:39] FFmpeg: Nvenc initialized successfully

[19:27:39] FFmpeg: Calling dl_fn->cuda_dl->cuInit(0)

[19:27:39] FFmpeg: Calling dl_fn->cuda_dl->cuDeviceGetCount(&nb_devices)

[19:27:39] FFmpeg: 1 CUDA capable devices found

[19:27:39] FFmpeg: Calling dl_fn->cuda_dl->cuDeviceGet(&cu_device, idx)

[19:27:39] FFmpeg: Calling dl_fn->cuda_dl->cuDeviceGetName(name, sizeof(name), cu_device)

[19:27:39] FFmpeg: Calling dl_fn->cuda_dl->cuDeviceComputeCapability(&major, &minor, cu_device)

[19:27:39] FFmpeg: [ GPU #0 - < NVIDIA GeForce GTX 760 > has Compute SM 3.0 ]

[19:27:39] FFmpeg: Calling dl_fn->cuda_dl->cuCtxCreate(&ctx->cu_context_internal, 0, cu_device)

[19:27:39] FFmpeg: Calling dl_fn->cuda_dl->cuCtxPopCurrent(&dummy)

[19:27:39] FFmpeg: Multiple reference frames are not supported by the device

[19:27:39] FFmpeg: Calling dl_fn->cuda_dl->cuCtxPushCurrent(ctx->cu_context)

[19:27:39] FFmpeg: Calling dl_fn->cuda_dl->cuCtxPopCurrent(&dummy)

[19:27:39] FFmpeg: Calling dl_fn->cuda_dl->cuCtxDestroy(ctx->cu_context_internal)

[19:27:39] FFmpeg: No capable devices found

[19:27:39] FFmpeg: Nvenc unloaded

[19:27:39] Failed opening codec: h264_nvenc

[19:27:39] Unable to open video encoder: h264_nvenc

[19:27:39] Closing encoders ...

[19:27:39] Opening encoder failed! Aborting ...

Vouk, on the Nvidia GTX 1060 + Voucoder is the same. With the plug-in Nvenc 1.11 with such settings, it encodes without errors.