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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 ?

• 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 ?