FFmpeg：尝试使用硬件 scale_npp 过滤器时出现格式错误

Question

我在 Ubuntu 22.04LTS 上安装了 CUDA，并配备了 NVidia Geforce 显卡。我目前正在尝试通过运行此命令来捕获完整桌面

ffmpeg -y -hide_banner \
  -hwaccel cuda \
  -f x11grab \
  -framerate 25 \
  -video_size 3840x2160 \
  -i :1.0+0,0 \
  -vf "scale_npp=1920:-1" \
  -c:v hevc_nvenc -cq:v 21 -preset slow \
  output.mp4

该scale_npp过滤器导致以下错误：

Impossible to convert between the formats supported by the filter 'graph 0 input from stream 0:0' and the filter 'auto_scale_0'
[vf#0:0 @ 0x561418cffe00] Error reinitializing filters!
[vf#0:0 @ 0x561418cffe00] Task finished with error code: -38 (Function not implemented)
[vf#0:0 @ 0x561418cffe00] Terminating thread with return code -38 (Function not implemented)
[vost#0:0/hevc_nvenc @ 0x561418ce2840] Could not open encoder before EOF
[vost#0:0/hevc_nvenc @ 0x561418ce2840] Task finished with error code: -22 (Invalid argument)
[vost#0:0/hevc_nvenc @ 0x561418ce2840] Terminating thread with return code -22 (Invalid argument)
[out#0/mp4 @ 0x561418ce0c00] Nothing was written into output file, because at least one of its streams received no packets.

由于这个错误，我不知道一切是否都正常Function not implemented。

一般来说，我想确保所有操作都在我的 GPU 上完成，然后将最终结果发送到输出文件。

以下是系统的一些输出：

• ffmpeg -hide_banner -h encoder=hevc_nvenc

Encoder hevc_nvenc [NVIDIA NVENC hevc encoder]:
    General capabilities: dr1 delay hardware 
    Threading capabilities: none
    Supported hardware devices: cuda cuda 
    Supported pixel formats: yuv420p nv12 p010le yuv444p p016le yuv444p16le bgr0 bgra rgb0 rgba x2rgb10le x2bgr10le gbrp gbrp16le cuda

• ffmpeg -hide_banner -h filter=scale_npp

Filter scale_npp
  NVIDIA Performance Primitives video scaling and format conversion
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)