我的 NVIDIA 和 FFMPEG 配置如下：Linux TestBox1 6.8.0-41-generic #41-Ubuntu SMP PREEMPT_DYNAMIC Fri Aug 2 20:41:06 UTC 2024 x86_64 x86_64 x86_64 GNU/LinuxNVIDIA-Linux-x86_64-560....

我的NVIDIA和FFMPEG配置如下：

Linux TestBox1 6.8.0-41-generic #41-Ubuntu SMP PREEMPT_DYNAMIC 2024 年 8 月 2 日星期五 20:41:06 UTC x86_64 x86_64 x86_64 GNU/Linux

NVIDIA-Linux-x86_64-560.31.02

ffmpeg version git-2024-08-19-507c2a577
encoders:
 V....D av1_nvenc            NVIDIA NVENC av1 encoder (codec av1)
 V....D h264_nvenc           NVIDIA NVENC H.264 encoder (codec h264)
 V....D hevc_nvenc           NVIDIA NVENC hevc encoder (codec hevc)
decoders:
 V..... av1_cuvid            Nvidia CUVID AV1 decoder (codec av1)
 V..... h264_cuvid           Nvidia CUVID H264 decoder (codec h264)
 V..... hevc_cuvid           Nvidia CUVID HEVC decoder (codec hevc)
 V..... mjpeg_cuvid          Nvidia CUVID MJPEG decoder (codec mjpeg)
 V..... mpeg1_cuvid          Nvidia CUVID MPEG1VIDEO decoder (codec mpeg1video)
 V..... mpeg2_cuvid          Nvidia CUVID MPEG2VIDEO decoder (codec mpeg2video)
 V..... mpeg4_cuvid          Nvidia CUVID MPEG4 decoder (codec mpeg4)
 V..... vc1_cuvid            Nvidia CUVID VC1 decoder (codec vc1)
 V..... vp8_cuvid            Nvidia CUVID VP8 decoder (codec vp8)
 V..... vp9_cuvid            Nvidia CUVID VP9 decoder (codec vp9)
filters:
 ... bilateral_cuda    V->V       GPU accelerated bilateral filter
 T.. bwdif_cuda        V->V       Deinterlace CUDA frames
 ... chromakey_cuda    V->V       GPU accelerated chromakey filter
 ... colorspace_cuda   V->V       CUDA accelerated video color converter
 ..C crop              V->V       Crop the input video.
 T.C cropdetect        V->V       Auto-detect crop size.
 ... hwupload_cuda     V->V       Upload a system memory frame to a CUDA device.
 ... overlay_cuda      VV->V      Overlay one video on top of another using CUDA
 ... scale_cuda        V->V       GPU accelerated video resizer
 ... scale_npp         V->V       NVIDIA Performance Primitives video scaling and format conversion
 ... scale2ref_npp     VV->VV     NVIDIA Performance Primitives video scaling and format conversion to the given reference.
 ... sharpen_npp       V->V       NVIDIA Performance Primitives video sharpening filter.
 ... thumbnail_cuda    V->V       Select the most representative frame in a given sequence of consecutive frames.
 ... transpose_npp     V->V       NVIDIA Performance Primitives video transpose
 T.. yadif_cuda        V->V       Deinterlace CUDA frames

我希望能够使用 CUDA 来裁剪和缩放视频，但我找不到正确的语法。我的努力通常在缩放方面有效，但在裁剪方面无效，下面是我遇到的问题类型的一个示例：

本例中的源文件是一个简短的 mpeg2 视频（960x540，顶部和底部有黑条）。该命令当前从 bash 脚本运行。

ffmpeg -y -hwaccel cuda -hwaccel_output_format cuda -c:v mpeg2_cuvid -crop 960x408x0x66 -i $1 -vf scale_npp=1280x544 -c:a copy -c:v h264_nvenc -b:v 2M -preset slow $2

这将引发以下错误：

[mpeg2_cuvid @ 0x5e6d9deb56c0] cuvid decode callback error
[vist#0:0/mpeg2video @ 0x5e6d9de85b40] [dec:mpeg2_cuvid @ 0x5e6d9de7b7c0] Decoding error:        Generic error in an external library

我的 ffmpeg 构建有问题吗？过滤器列表是否应该包含类似 crop_cuda 或 crop_npp 的内容，或者我是否使用了错误的语法来在 GPU 上执行所有操作（这可能吗？）。