ffmpeg ... "Impossible to convert between the formats supported by the filter"

Question

使用 2017 年 11 月 26 日构建的最新 ffmpeg master，我无法解读错误消息的含义，更重要的是，无法理解如何处理它们。

从 -vf 更改为 -filter_complex 没有任何作用(我必须尝试)。主要错误消息似乎是

Impossible to convert between the formats supported by the filter

我尝试在 yadif 和 unsharp_opencl 之前/之间/之后插入“format=”和“scale”，但没有成功。

我想知道，这是否与需要 hwupload/hwdownload/hwmap 有关，或者这是一个转移注意力的事情？

我做错了什么？

".\ffmpeg_3.latest_master.exe" -hide_banner -v verbose -init_hw_device opencl=ocl:1.0 -filter_hw_device ocl -i ".\test_01.mpg" -an -map_metadata -1 -sws_flags lanczos+accurate_rnd+full_chroma_int+full_chroma_inp -filter_complex "[0:v]yadif=0:0:0,scale=flags=lanczos+accurate_rnd+full_chroma_int+full_chroma_inp,unsharp_opencl=lx=3:ly=3:la=0.5:cx=3:cy=3:ca=0.5,setdar=dar=16/9" -r 25 -c:v h264_nvenc -preset slow -bf 2 -g 50 -refs 3 -rc:v vbr_hq -rc-lookahead:v 32 -cq 22 -qmin 16 -qmax 25 -coder cabac -movflags +faststart -profile:v high -level 4.1 -pixel_format yuv420p -y ".\test_01.newest.MP4" 
[AVHWDeviceContext @ 0000020e229aad40] 1.0: NVIDIA CUDA / GeForce GTX 750 Ti
[AVHWDeviceContext @ 0000020e229aad40] DXVA2 to OpenCL mapping function found (clCreateFromDX9MediaSurfaceKHR).
[AVHWDeviceContext @ 0000020e229aad40] DXVA2 in OpenCL acquire function found (clEnqueueAcquireDX9MediaSurfacesKHR).
[AVHWDeviceContext @ 0000020e229aad40] DXVA2 in OpenCL release function found (clEnqueueReleaseDX9MediaSurfacesKHR).
[AVHWDeviceContext @ 0000020e229aad40] The cl_khr_d3d11_sharing extension is required for D3D11 to OpenCL mapping.
[AVHWDeviceContext @ 0000020e229aad40] D3D11 to OpenCL mapping not usable.
[mpeg @ 0000020e229ae240] max_analyze_duration 5000000 reached at 5000000 microseconds st:0
Input #0, mpeg, from '.\test_01.mpg':
  Duration: 00:06:29.96, start: 0.240000, bitrate: 2799 kb/s
    Stream #0:0[0x1e0]: Video: mpeg2video (Main), 1 reference frame, yuv420p(tv, top first, left), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x1c0]: Audio: mp2, 48000 Hz, stereo, s16p, 256 kb/s
[Parsed_scale_1 @ 0000020e29951a20] w:iw h:ih flags:'lanczos+accurate_rnd+full_chroma_int+full_chroma_inp' interl:0
Stream mapping:
  Stream #0:0 (mpeg2video) -> yadif
  setdar -> Stream #0:0 (h264_nvenc)
Press [q] to stop, [?] for help
[Parsed_scale_1 @ 0000020e29cccda0] w:iw h:ih flags:'lanczos+accurate_rnd+full_chroma_int+full_chroma_inp' interl:0
[graph 0 input from stream 0:0 @ 0000020e29ccc980] w:720 h:576 pixfmt:yuv420p tb:1/90000 fr:25/1 sar:64/45 sws_param:flags=2
[auto_scaler_0 @ 0000020e29ccc580] w:iw h:ih flags:'bilinear' interl:0
[Parsed_unsharp_opencl_2 @ 0000020e29ccc4a0] auto-inserting filter 'auto_scaler_0' between the filter 'Parsed_scale_1' and the filter 'Parsed_unsharp_opencl_2'
Impossible to convert between the formats supported by the filter 'Parsed_scale_1' 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
Conversion failed!

Answer 1

没关系。找到了有用的东西。例如

.\ffmpeg.exe -hide_banner -v verbose -init_hw_device 
opencl=ocl:1.0 -filter_hw_device ocl -i 
".\test_01.mpg" -an -map_metadata -1 -sws_flags 
lanczos+accurate_rnd+full_chroma_int+full_chroma_inp -filter_complex 
"[0:v]yadif=0:0:0,hwupload,unsharp_opencl=lx=3:ly=3:la=0.5:cx=3:cy=3:ca=0.5,hwdownload,setdar=dar=16/9" 
 -r 25 -c:v h264_nvenc -preset slow -bf 2 -g 50 -refs 3 -rc:v 
vbr_hq -rc-lookahead:v 32 -cq 22 -qmin 16 -qmax 26 -coder cabac -movflags 
+faststart -profile:v high -level 4.1 -pixel_format yuv420p -y 
".\test_01.newest.MP4"

为什么不...您的设备 ID(例如上面的“1.0”)可以通过查看这些找到

.\ffmpeg.exe -hide_banner -v verbose -init_hw_device list
.\ffmpeg.exe -hide_banner -v verbose -init_hw_device opencl
.\ffmpeg.exe -hide_banner -v verbose -init_hw_device opencl:1.0 

您可以从他们的选项中了解其中的内容:-

.\ffmpeg.exe -hide_banner -v verbose -h encoder=h264_nvenc 
.\ffmpeg.exe -hide_banner -v verbose -h filter=yadif 
.\ffmpeg.exe -hide_banner -v verbose -h filter=unsharp_opencl