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• avconv/ffmpg generating frames in php

  6 mars 2014, par fsulser

  I'm trying to generate some frames (at the moment) on my localhost server with this code :

  $cmd = 'avconv -i "../videos/medium.mp4" -vsync 1 -r 10 -f image2 -an -y -qscale 20 -s 120*90 -ss 00:00:05 -t 00:00:10 "out_%05d.jpg" 2>&1';
  
  
  
  passthru($cmd, $out);

  I get the following message :

  avconv version 0.8.10-4:0.8.10-0ubuntu0.12.04.1, ............
  Press ctrl-c to stop encoding [image2 @ 0x646120] Could not open file : out_00001.jpg av_interleaved_write_frame() : Input/output error failed1

  The problem is if I run this command in my terminal it works. Does anyone know whats the problem ? Is it due to permisson or something else ?

• 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