FFmpeg中h264_qsv编码器显示支持p010le像素格式但转码报错的问题咨询

我遇到了一个奇怪的问题，一直没法解决。

当我查看当前使用的FFmpeg版本中h264_qsv编码器的特性时，它显示该编码器支持三种像素格式：

I:\Downloads>ffmpeg -hide_banner -h encoder=h264_qsv

Encoder h264_qsv [H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (Intel Quick Sync Video acceleration)]:

General capabilities: delay hybrid

Threading capabilities: none

Supported hardware devices: qsv qsv qsv

Supported pixel formats: nv12 p010le qsv

h264_qsv encoder AVOptions:

-async_depth               E..V....... Maximum processing parallelism (from 1 to INT_MAX) (default 4)

-avbr_accuracy             E..V....... Accuracy of the AVBR ratecontrol (from 0 to INT_MAX) (default 0)

-avbr_convergence          E..V....... Convergence of the AVBR ratecontrol (from 0 to INT_MAX) (default 0)

-preset                    E..V....... (from 1 to 7) (default medium)

veryfast        7            E..V.......

[and so on.]

但当我把像素格式p010le复制到转码用的批处理文件中（默认用nv12时是可以正常工作的），就会报错：

I:\Capture>ffmpeg -hide_banner -err_detect ignore_err -loglevel info -stats -benchmark  -init_hw_device qsv:hw,child_device_type=qsv -hwaccel qsv -hwaccel_output_format qsv -vsync vfr -ec deblock  -ss 00:01:32.432 -to 00:10:53.064  -i "Little Cheeser 1936 raw.avi"    -strict normal -fflags +igndts+genpts -c:a aac -q:a 0.9 -ac 1 -af dynaudnorm -g 60  -async_depth 128   -vf "hwupload=extra_hw_frames=128,format=p010le,vpp_qsv=cw=948:ch=720:cx=0:cy=0"  -q:v 28  -c:v h264_qsv  -preset veryslow    -rdo 1 -extbrc 1 -look_ahead_depth 100 -look_ahead_downsampling auto -avbr_accuracy 500   -mbd rd -refs 4 -me_range 1024 -trellis 2 -idct auto -subq 8 -adaptive_i 1 -adaptive_b 1 -flags +aic+mv4+qpel+ilme+loop  -movflags +faststart "Little Cheeser 1936.mp4"

Input #0, avi, from 'Little Cheeser 1936 raw.avi':

Duration: 00:11:06.16, start: 0.000000, bitrate: 4157 kb/s

Stream #0:0: Video: h264 (High 4:2:2) (H264 / 0x34363248), yuv422p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 3943 kb/s, 60 fps, 60 tbr, 60 tbn, 120 tbc

Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, fltp, 192 kb/s

File 'Little Cheeser 1936.mp4' already exists. Overwrite? [y/N] y

Stream mapping:

Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_qsv))

Stream #0:1 -> #0:1 (ac3 (native) -> aac (native))

Press [q] to stop, [?] for help

Impossible to convert between the formats supported by the filter 'Parsed_hwupload_0' and the filter 'auto_scaler_0'

Error reinitializing filters!

Failed to inject frame into filter network: Function not implemented

Error while processing the decoded data for stream #0:0

bench: maxrss=60096kB

Conversion failed!

（我在报错前插入了一个空白行，方便定位）

我已经尝试过把视频滤镜流简化成只保留format=p010le，但还是遇到同样的失败。我也试过在命令中单独使用-pix_fmt p010le（不在视频滤镜里），同样会报错。我还把命令精简到最基础的形式，但问题依然存在。

我不明白为什么FFmpeg会在编码器信息里显示支持p010le，实际却用不了。有没有人能帮我理清这个问题？

备注：内容来源于stack exchange，提问作者Bart Lederman