Error with encoding H264 to H265

[Veliferum]

CPU : i5 13700K
OS : Windows 11 Pro
GPU : Sparkle Arc B580
Mem : 16GB
QSVEncC64 : 8.07
Driver: 32.0.101.8626

d:\NZBGet\complete>"C:\Users\velif\AppData\Roaming\QSVEnc\QSVEncC64.exe" --avhw -i "D:\NZBGet\complete\SkyDive.mp4" -c hevc --icq 20 --output-depth 8 --quality best --i-adapt --b-adapt --profile auto --gop-len 0 --level auto --chromaloc auto --colorrange auto --colormatrix auto --colorprim auto --transfer auto --master-display copy --max-cll copy --avsync auto --parallel auto --metadata copy --chapter-copy --audio-copy -o "SkyDive_Rem.mp4"

SkyDive_Rem.mp4

Error (clGetDeviceIDsFromD3D11KHR): device not found.
MFXDEC: Failed to get required buffer size for MFXDEC: undeveloped feature.
MFXDEC: Failed to get required buffer size for MFXDEC: undeveloped feature.
Failed to initialize decoder.
: undeveloped feature.
Failed to initialize decoder.
: undeveloped feature.
PE0: PE0[12792]: Processing finished: undeveloped feature.
Failed to initialize decoder.
: undeveloped feature.
PE1: PE1[9096]: Processing finished: undeveloped feature.

QSVEncC.exe finished with error!

---

MediaInfo 26.01

General
Complete name : D:\NZBGet\complete\SkyDive.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (mp42/mp41)
File size : 13.1 GiB
Duration : 31 min 11 s
Overall bit rate mode : Variable
Overall bit rate : 60.3 Mb/s
Frame rate : 59.940 FPS
Encoded date : 2026-01-24 01:00:48 UTC
Tagged date : 2026-01-24 02:13:11 UTC
TIM : 00:00:00:00
TSC : 60000
TSZ : 1001

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L6
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 31 min 11 s
Bit rate mode : Constant
Bit rate : 60.0 Mb/s
Width : 5 760 pixels
Height : 2 880 pixels
Display aspect ratio : 2.000
Frame rate mode : Constant
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.060
Stream size : 13.1 GiB (99%)
Writing library : AVC Coding
Language : English
Encoded date : 2026-01-24 01:00:52 UTC
Tagged date : 2026-01-24 01:00:52 UTC
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 31 min 11 s
Source duration : 31 min 11 s
Bit rate mode : Variable
Bit rate : 317 kb/s
Maximum bit rate : 423 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 70.8 MiB (1%)
Source stream size : 70.8 MiB (1%)
Language : English
Encoded date : 2026-01-24 01:00:51 UTC
Tagged date : 2026-01-24 01:00:51 UTC

[rigaya]

QSV hw decode support for H.264 seems to be up to 4096x2304.
https://community.intel.com/t5/Media-Intel-Video-Processing/maximum-supported-video-resolution-for-media-SDK-and-h264-qsv/td-p/1128778

Therefore, in this case, I'm afraid you'll need to add --avsw for software decoding.