./configure --arch=x86_64 --target-os=mingw32 --cross-prefix=x86_64-w64-mingw32- --pkg-config=pkg-config --enable-nonfree --disable-shared --enable-nvenc --enable-cuda --enable-cuvid --enable-libnpp --extra-cflags=-I/usr/local/include --extra-cflags=-I/usr/local/cuda/include/ --extra-ldflags=-L/usr/local/cuda/lib64/ --extra-cflags=-I../tmp/include/ --extra-ldflags=-L../tmp/lib/x64/
The compilation completed successully. When I copied the ffmpeg.exe file to Windows and tried to execute it I got an errore message saying the executable was missing some npp_*.dll.
From the package cuda_8.0.61_win10.exe I copied all the dlls included into the folder npp\bin to the same directory I put ffmpeg.exe.
After that the application run normally and a simple conversion from a 4K file completed as expected.
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Actually I went nuts about ffmpeg is not building with the same problem. I fianally managed to get it worked under Windows 10 x64:
Download msys2 from https://www.msys2.org/ and install all packages with Pacman
pacman -Su
pacman -S make
pacman -S diffutils
pacman -S yasm
pacman -S mingw-w64-x86_64-gcc
pacman -S mingw-w64-x86_64-toolchain
add pkgconfig to environment variable PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
Add additional installed toolchain to path: PATH=$PATH:/opt/bin
Start mingw64 version: C:\msys64\msys2_shell.cmd -mingw64
Download and install Cuda from nVidia https://developer.nvidia.com/cuda-downloads?target_os=Windows&target_arch=x86_64&target_version=10&target_type=exenetwork
Extract the downloaded file e.g. cuda_11.2.2_461.33_win10.exe with 7zip locally
Copy cuda_nvcc\nvcc\include to your msys2 e.g. C:\msys64\tmp\nvidia_include
Copy libnpp\npp_dev\lib\x64 to your C:\msys64\tmp\nvidia_lib\x64
Copy libnpp\npp_dev\include to C:\msys64\tmp\nvidia_npp_include
git clone https://github.com/FFmpeg/FFmpeg.git to C:\msys64\home\<user>
git clone https://github.com/libav/libav to C:\msys64\home\<user>
Maybe optional step: git clone https://git.videolan.org/git/ffmpeg/nv-codec-headers.git to C:\msys64\home\<user>
make install
Optional because make install should have done this for you: Copy ffnvcodec.pc to C:\msys64\usr\local\lib\pkgconfig
Build libav avconv.exe and avprobe.exe are needed for ffmpeg later:
cd C:\msys64\home\<user>\libav
./configure
make install
Finally build ffmpeg:
cd C:\msys64\home\<user>\ffmpeg
./configure --enable-nonfree --disable-shared --enable-nvenc --enable-cuda --enable-cuvid --enable-libnpp --extra-cflags=-I/tmp/nvidia_npp_include --extra-cflags=-I/tmp/nvidia_include --extra-ldflags=-L/tmp/nvidia_lib/x64
make install
Copy avconv.exe and avprobe.exe to ffmpeg directory
Done.
Bugfixing:
Missing DLLs: find x64 missing DLLs on your harddisk or in internet.
Use dependency walker for analyzing errors
Download the newest nVidia drivers and use nSight making sure CUVID is supported for your graphic card.
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This would seem to be caused by a broken configuration script in the FFmpeg code base. There is no library called npp in recent CUDA distributions, instead on Windows platforms you will have
nppc.lib
nppi.lib
npps.lib
and on linux
libnppc.so
libnppi.so
libnpps.so
You will either need to modify the configuration system yourself or file a bug request with the project developers to do it for you.
There might still be additional problems building the project with MinGW, but that is way beyond the scope of a Stack Overflow question.
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If you check config.log, there may have a lot link warnings:
LINK : warning LNK4044: unrecognized option '/L...'; ignored
cause
ERROR: libnpp not found.
Since /L is not a correct argument for msvc linker, in order to include library path, the argument should as follow:
./configure .... --extra-cflags=-I/usr/local/cuda/... --extra-ldflags=-LIBPATH:/usr/local/cuda/...
This should able to solve the libnpp not found issue.
FYI, linker options are listed in the following link (included LIBPATH):
Linker Options
2022 Update
On this weekend I also managed to build latest ffmpeg with working scale_npp filter. Without any npp missing library error during compilation and building. But with some caveats (see below).
I followed this guide by NVIDIA with installed NVIDIA GPU Computing Toolkit v11.7 and latest driver display 473.47 for my video card GeForce GT 710 on Windows 10 21H2 x64
Changes (adaptations) for steps in the guide
I copied all headers including folders from directory path_to_CUDA_toolkit/include
I excluded pkg-config from pacman packages, because after recommended installation steps (step 7 in particular) of MSYS2 it conflicts with installed pkgconf package, i.e. use this command instead:
pacman -S diffutils make yasm
I added directories to Visual Studio C compiler to PATH environment variable in advance (using Windows GUI), in addition to declaring them in the MinGW64 terminal as specified in the guide:
export PATH="/c/Program Files (x86)/Microsoft Visual Studio/2017/BuildTools/VC/Tools/MSVC/14.16.27023/bin/Hostx64/x64/":$PATH
export PATH="/d/NVIDIA GPU Computing Toolkit/CUDA/v11.7/bin/":$PATH
After making (building) ffnvcodec headers, define PKG_CONFIG_PATH (where compiled file ffnvcodec.pc is located) before configure command.
Use absolute paths for --extra-cflags and --extra-ldflags options of configure command. It's probably the main thing in solving "not found" errors. But don't forget that these paths will be printed in ffmpeg banner with other explicit build options.
PKG_CONFIG_PATH="/d/_makeit/nv-codec-headers/" ./configure --enable-nonfree --disable-shared --enable-cuda-nvcc --enable-libnpp --toolchain=msvc --extra-cflags="-I/d/_makeit/ffmpeg/nv_sdk/" --extra-ldflags="-LIBPATH:/d/_makeit/ffmpeg/nv_sdk/"
And that's it. At least -vf scale_npp should work.
In my case still DO NOT WORK the following things from the guide:
cuda built-in resizer and cropper, i.e. -hwaccel_output_format cuda –resize 1280x720 and -hwaccel_output_format cuda –crop 16x16x32x32. I bet that this is due to my old video card is not in GPU Support Matrix. But NVENC and NVDEC works fine for me almost without crutches. And it seems I'm note alone.
UPD: resizer and cropper work! BUT in the mentioned guide commands are incorrect. I found correct way in another NVIDIA FFmpeg Transcoding Guide. Decoder h264_cuvid was missed, must be so:
ffmpeg.exe -y -vsync passthrough -hwaccel cuda -hwaccel_output_format cuda -c:v h264_cuvid -resize 1280x720 -i input.mp4 -c:a copy -c:v h264_nvenc -b:v 5M output.mp4
ffmpeg.exe -y -vsync passthrough -hwaccel cuda -hwaccel_output_format cuda -c:v h264_cuvid -crop 16x16x32x32 -i input.mp4 -c:a copy -c:v h264_nvenc -b:v 5M output.mp4
-vf scale_cuda fails with error. Maybe I used wrong C compiler version or didn't install DirectX SDK from here or installed wrong packages after installing MSYS2 and ignoring pkg-config
[Parsed_scale_cuda_0 @ 000001A461479DC0] cu->cuModuleLoadData(cu_module, data) failed -> CUDA_ERROR_UNSUPPORTED_PTX_VERSION: the provided PTX was compiled with an unsupported toolchain.
there is no possibility to use -preset option for h264_nvenc with latest ffmpeg version where presets (enum) were updated. I noticed from ffmpeg report file, this is because using any preset causes "auto" enabling lookahead mode with log raw:
[h264_nvenc @ 00000158EFC6E500] Lookahead enabled: depth 28, scenecut enabled, B-adapt enabled.
Even though the options -rc-lookahead and -temporal-aq are not supported by my device (video card). I have to use only one preset p4 (medium) which is by default. And I don't know how to workaround this issue. Value 0 for -rc-lookahead also does not help.
specifying -bf 2 only works with option -extra_hw_frames 6 (six in my case - number of extra frames can differ for your card). Or using only -bf 0. But this is due to constraints of my old video card.
ffmpeg.exe -v verbose -y -vsync passthrough -hwaccel cuda -hwaccel_output_format cuda -extra_hw_frames 6 -i input-1080p.mkv -map 0:v -map 0:a -c:a copy -c:v h264_nvenc -b:v 1M -bf 2 -bufsize 1M -maxrate 2M -qmin 0 -g 250 -b_ref_mode middle -i_qfactor 0.75 -b_qfactor 1.1 output.mp4
I hope my notes will help future Google and SO users.
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