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• Mingw-w64 builded FFmpeg doesn't show any usage information

  26 octobre 2013, par user1240328

  First I wanted to modificate ffplay according to my requirments. Then I noticed that original ffplay from my build can't play some video files, but it didn't write any message to console. Then I noticed that ffmpeg also don't write any usage message when I run it without params. But it works. If I run it from terminal it's like running asynchronously ! The terminal just shows next row. I mean it asks for a next command. But the ffmpeg process is visible in task manager and it writes the output video file what I had requested !

  I created following souce file. I have modified the Makefile. So it have built the exe-file works just the same way. I have no idea how it can be.

  #include 
  
  #include "cmdutils.h"
  
  
  
  const char program_name[] = "hello";
  
  const int program_birth_year = 2013;
  
  
  
  void show_help_default(const char *opt, const char *arg)
  
  {
  
      printf("zxcvbnm\n");
  
  }
  
  
  
  int main(int argc, char **argv)
  
  {
  
      printf("1234567890\n");
  
      return 0;
  
  }

  I want to prevent this behavior.

  I want to make printf working in traditional manner.

  How I build FFmpeg :

  PKG_CONFIG_PATH=/home/developer/workspace/MinGW32fs/lib/pkgconfig/ \
  
  SDL_CONFIG=/home/developer/workspace/MinGW32fs/bin/sdl-config \
  
  ./configure \
  
    --prefix=/home/developer/workspace/MinGW32fs \
  
    --extra-ldflags="-L/home/developer/workspace/MinGW32fs/lib" \
  
    --extra-cflags="-I/home/developer/workspace/MinGW32fs/include" \
  
    --arch=x86 --target-os=mingw32 --cross-prefix=i686-w64-mingw32-  \
  
    --pkg-config=pkg-config   --enable-libtheora --enable-libvorbis --enable-libvpx \
  
    --enable-outdev=sdl --enable-shared --disable-static \
  
    --disable-doc --disable-manpages --disable-podpages
  
  
  
  make

• How to build ffmpeg v6.0 with filter overlay_cuda ? [closed]

  6 février 2024, par yang

  My system version is ubuntu 22.04 LTS.

  


  I build ffmpeg v6.0 for tesla T4, but when I run

  


  ffmpeg -h filter=overlay_cuda


  


  the terminal output

  


  Unknown filter 'overlay_cuda'.


  


  then I tried to run

  


  ffmpeg \
    -hide_banner -y \
    -hwaccel cuda -hwaccel_output_format cuda \
    -i input \
    -filter_complex "[0:v:0]hwupload_cuda[main];[0:v:0]scale_npp=100:100,hwupload_cuda[logo];[main][logo]overlay_cuda[output]" \
    -map "[output]" -c:v h264_nvenc \
    output


  


  the terminal output

  


  [AVFilterGraph @ 0x561092fca380] No such filter: 'overlay_cuda'
Error initializing complex filters.
Filter not found


  


  Here is my build steps.

  


  1. install nvidia driver and cuda tool kit

  


  wget https://developer.download.nvidia.com/compute/cuda/12.0.0/local_installers/cuda_12.0.0_525.60.13_linux.run
sudo sh cuda_12.0.0_525.60.13_linux.run 


  


  2. download ffmpeg v6.0 source code and nv-codec-headers

  


  git clone -b release/6.0 https://git.ffmpeg.org/ffmpeg.git ffmpeg_cuda_6.0/
git clone -b sdk/12.0 https://git.videolan.org/git/ffmpeg/nv-codec-headers.git nv-codec-headers-12.0/
cd nv-codec-headers
make install


  


  3. ffmpeg configure and build

  


  PKG_CONFIG_PATH="/usr/local/lib/pkgconfig" \
./configure \
--enable-cuda \
--enable-cuvid \
--enable-nvdec \
--enable-nvenc \
--enable-nonfree \
--enable-libnpp \
--nvcc='/usr/local/cuda/bin/nvcc' \
--extra-cflags='-I/usr/local/cuda/include' \
--extra-ldflags='-L/usr/local/cuda/lib64' \
--enable-opencl \
--enable-shared \
--enable-gpl \
--enable-nonfree

make -j 8
make install


  


  4. export library

  


  export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib/
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/cuda/lib64


  


• python3.6 ffmpeg call MacOSX

  8 avril 2017, par Awazleon

  I’m using Python 3.6 on MacOSX. I would like to use FFmpeg as Python sub-process. Everything works fine when using the OSX embedded Python 2.7 but using 3.6, this doesn’t work.
  I’ve got an error message because it doesn’t find FFmepg.

  raise FFExecutableNotFoundError("Executable ’0’ not found".format(self.executable))
  ffmpy.FFExecutableNotFoundError : Executable ’ffmpeg’ not found

  As you can se I tried with ffmpy but I also got the same result by invoking FFmpeg directly

  from subprocess import call
  call(["ffmpeg"])
  Traceback (most recent call last) :
  File "", line 1, in
  call(["ffmpeg"])
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/subprocess.py", line 267, in call
  with Popen(*popenargs, **kwargs) as p :
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/subprocess.py", line 707, in init
  restore_signals, start_new_session)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/subprocess.py", line 1326, in _execute_child
  raise child_exception_type(errno_num, err_msg)
  FileNotFoundError : [Errno 2] No such file or directory : ’ffmpeg’

  I installed the FFmpeg lib. by using Brew through Terminal. It was well installed but only visible by Python 2.7, not 3.6.

  Calling it from terminal is working :

  iMac-de-xxxxx : utilisateur$ ffmpeg

  ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
  built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
  configuration : —prefix=/usr/local/Cellar/ffmpeg/3.2.4 —enable-shared —enable-pthreads —enable-gpl —enable-version3 —enable-hardcoded-tables —enable-avresample —cc=clang —host-cflags= —host-ldflags= —enable-libmp3lame —enable-libx264 —enable-libxvid —enable-opencl —disable-lzma —enable-vda

  I’m not (yet) a Linux specialist but I think that a path is missing for 3.6 to find FFmpeg.
  Any clue to solve this annoying issue ?