我正在运行这个命令：
ffmpeg -init_hw_device qsv=hw -filter_hw_device -f rawvideo -pix_fmt yuv420p -s:v 2560x1440 -i normal-desktop-use-1440p.mkv -c:v h264_qsv -
b:v 5M output.mp4
我收到以下错误：
Splitting the commandline.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Reading option '-init_hw_device' ... matched as option 'init_hw_device' (initialise hardware device) with argument 'qsv=hw'.
Reading option '-filter_hw_device' ... matched as option 'filter_hw_device' (set hardware device used when filtering) with argument 'hw'.
Reading option '-f' ... matched as option 'f' (force format) with argument …