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• FFMPEG in Bash : Why ffmpeg doesn't convert the video automatically ? [duplicate]

  4 janvier 2021, par Xyanophat

  I'm doing a car live stream video system. I try to convert the video from .avi to .mp4.

  


  So I use inotify-tools to detect if a new file updated. Then I encounter a problem. When 4 video update at a same time. Ffmpeg only convert one video. It doesn't convert others video when the first was converted.

  


  There is the bash code below :

  


  #!/bin/bash
TARGET=/home/test/update
PROCESSED=/home/test/convert

inotifywait -m -e create -e moved_to --format "%f" $TARGET \
    | while read FILENAME
            do
                    ddate=${FILENAME:0:8}
                    dtime=${FILENAME:8:6}
                    camera=${FILENAME:77:1}
                    echo Detected $FILENAME, moving and compressing...
                    nFILENAME="KLE-5592_"${ddate}"_"${dtime}"_CH"${camera}"$
                    ffmpeg -i $TARGET/$FILENAME -vcodec libx264 -crf 40 $PROCESSED/$nFILENAME 
            done


  


  Thanks for help !

  


• Cmake error with ffmpeg and PkgConfig : cannot find -lpkgcfg_lib_LIBAV_stdc++

  16 septembre 2021, par yag

  I want to create my C++ project using ffmpeg and cmake on Ubuntu 18.04, but comes up with errors :

  


  -- The C compiler identification is GNU 7.5.0
-- The CXX compiler identification is GNU 7.5.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.1") 
-- Checking for modules 'libavdevice;libavfilter;libavformat;libavcodec;libswresample;libswscale;libavutil'
--   Found libavdevice, version 59.0.100
--   Found libavfilter, version 8.1.103
--   Found libavformat, version 59.4.101
--   Found libavcodec, version 59.4.101
--   Found libswresample, version 4.0.100
--   Found libswscale, version 6.0.100
--   Found libavutil, version 57.3.100
-- Configuring done
-- Generating done
-- Build files have been written to: /home/yg/Documents/xsplay/build
Scanning dependencies of target xsplay
[ 50%] Building CXX object CMakeFiles/xsplay.dir/src/ffplay.cpp.o
[100%] Linking CXX executable xsplay
/usr/bin/ld: cannot find -lpkgcfg_lib_LIBAV_stdc++-NOTFOUND
/usr/bin/ld: cannot find -lpkgcfg_lib_LIBAV_gcc_s-NOTFOUND
/usr/bin/ld: cannot find -lpkgcfg_lib_LIBAV_gcc-NOTFOUND
collect2: error: ld returned 1 exit status
CMakeFiles/xsplay.dir/build.make:233: recipe for target 'xsplay' failed
make[2]: *** [xsplay] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/xsplay.dir/all' failed
make[1]: *** [CMakeFiles/xsplay.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2


  


  FFmpeg version is 4.4, built from source code.

  


  PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \
  --prefix="$HOME/ffmpeg_build" \
  --pkg-config-flags="--static" \
  --extra-cflags="-I$HOME/ffmpeg_build/include" \
  --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
  --extra-libs="-lpthread" \
  --cxx="g++" \
  --ld="g++" \
  --bindir="$HOME/bin" \
  --disable-ffplay \
  --enable-gpl \
  --enable-gnutls \
  --enable-libaom \
  --enable-libass \
  --enable-libfdk-aac \
  --enable-libfreetype \
  --enable-libmp3lame \
  --enable-libopus \
  --enable-libvorbis \
  --enable-libvpx \
  --enable-libx264 \
  --enable-libx265 \
  --enable-nonfree && \
PATH="$HOME/bin:$PATH" make && \
make install && \
hash -r


  


  I removed unnecessary code to simplify the project, below is main.cpp

  


  #include &#xA;#include &#xA;#include &#xA;&#xA;extern "C"&#xA;{&#xA;#include <libavutil></libavutil>frame.h>&#xA;#include <libavutil></libavutil>mem.h>&#xA;#include <libavcodec></libavcodec>avcodec.h>&#xA;}&#xA;&#xA;int main(int argc, char **argv)&#xA;{&#xA;    printf("xsplay\n");&#xA;    return 0;&#xA;}&#xA;

  


  CMakeLists.txt is modified from https://stackoverflow.com/a/61427931/8609327, I only changed cmake version to 3.10.

  


  cmake_minimum_required(VERSION 3.10)

project(xsplay)

find_package(PkgConfig REQUIRED)
pkg_check_modules(LIBAV REQUIRED IMPORTED_TARGET
    libavdevice
    libavfilter
    libavformat
    libavcodec
    libswresample
    libswscale
    libavutil
)

add_executable(${PROJECT_NAME}
    main.cpp
)

target_link_libraries(${PROJECT_NAME}
    PkgConfig::LIBAV
)


  


  Please help me solve the problem, thanks !

  


• Package not found - add libav to PKG_CONFIG_PATH environment variable

  19 mars 2019, par Brayton Larson

  I am attempting to build the Parrot SDK and when running the command it continuously fails due to multiple libav package variants not being found. Below is the error message.

  user@TheMysteriousMachine : /WORKING_DIRECTORY$ ./build.sh -p arsdk-native -t build-sdk -j
      [I] Starting task 'build-sdk'
      [I] In '/home/user/WORKING_DIRECTORY' :   ALCHEMY_TARGET_CONFIG_DIR="/home/user/WORKING_DIRECTORY/products/arsdk  /native/config" ALCHEMY_TARGET_OUT="/home/user/WORKING_DIRECTORY/out/arsdk-native" ALCHEMY_TARGET_PRODUCT="arsdk" ALCHEMY_TARGET_PRODUCT_VARIANT="native" ALCHEMY_TARGET_SCAN_ADD_DIRS=" /home/user/WORKING_DIRECTORY/packages" ALCHEMY_TARGET_SCAN_PRUNE_DIRS=" /home/user/WORKING_DIRECTORY" ALCHEMY_USE_COLORS="1" ALCHEMY_WORKSPACE_DIR="/home/user/WORKING_DIRECTORY" PARROT_BUILD_PROP_GROUP="drones" PARROT_BUILD_PROP_PRODUCT="arsdk" PARROT_BUILD_PROP_PROJECT="arsdk" PARROT_BUILD_PROP_UID="arsdk-native-20190316-1404-0.0.0" PARROT_BUILD_PROP_VARIANT="native" PARROT_BUILD_PROP_VERSION="0.0.0" /home/user/WORKING_DIRECTORY/build/alchemy/scripts/alchemake -j 8 all
      ----------------------------------------------------------------------
      + ALCHEMY_WORKSPACE_DIR = /home/user /WORKING_DIRECTORY
      + TARGET_PRODUCT = arsdk
      + TARGET_PRODUCT_VARIANT = native
      + TARGET_OS = linux
      + TARGET_OS_FLAVOUR = native
      + TARGET_LIBC = native
      + TARGET_ARCH = x64
      + TARGET_CPU = 
      + TARGET_OUT = /home/user/WORKING_DIRECTORY/out/arsdk-native
      + TARGET_CONFIG_DIR = /home/user/WORKING_DIRECTORY /products/arsdk/native/config
      + TARGET_CC_PATH = /usr/bin/cc
      + TARGET_CC_VERSION = 7
      ----------------------------------------------------------------------
      Scanning /home/user/WORKING_DIRECTORY/packages for makefiles...
      Found 44 makefiles
      Prebuilt module ncurses marked as overriden
      Prebuilt module ncurses marked as overriden
      Package libavcodec was not found in the pkg-config search path.
      Perhaps you should add the directory containing 
  libavcodec.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libavcodec' found
  
      Package libavformat was not found in the pkg-config search path.
  
      Perhaps you should add the directory containing
  libavformat.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libavformat' found
  
      Package libswscale was not found in the pkg-config search path.
  
      Perhaps you should add the directory containing
  libswscale.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libswscale' found
  
      Package libavutil was not found in the pkg-config search path.
  
      Perhaps you should add the directory containing
  libavutil.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libavutil' found
  
      Package libavcodec was not found in the pkg-config search path.
  
      Perhaps you should add the directory containing
  libavcodec.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libavcodec' found
  
      Package libavformat was not found in the pkg-config search path.
  
      Perhaps you should add the directory containing
  libavformat.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libavformat' found
  
      Package libswscale was not found in the pkg-config search path.
  
      Perhaps you should add the directory containing
  libswscale.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libswscale' found
  
      Package libavutil was not found in the pkg-config search path.
  
      Perhaps you should add the directory containing
  libavutil.pc'
  
      to the PKG_CONFIG_PATH environment variable
  
      No package 'libavutil' found
  
      Found 96 modules
  
      Computing modules dependencies...
  
      Checking modules dependencies...
  
      /home/user/WORKING_DIRECTORY/build/alchemy/main.mk:360 : *** /home/user    /WORKING_DIRECTORY/packages/libARDiscovery : module 'libARDiscovery'     depends on unknown module 'avahi'.  Stop.
  
      [E] Task 'build-sdk' failed (Command     failed (returncode=2))
  

  As I understand it libav has been replaced by ffmpeg but the build should still be able to reference the packages as libav. I’ve tried adding different paths to PKG_CONFIG_PATH using `export PKG_CONFIG_PATH=...’ but with no success. It is possible I’m not adding the correct path, I used ’dpkg -L ffmpeg’ to locate the package. The output of that is :

  user@TheMysteriousMachine : $ dpkg -L ffmpeg
      /.
      /etc
      /etc/ffserver.conf
      /usr
      /usr/bin
      /usr/bin/ffmpeg
      /usr/bin/ffplay
      /usr/bin/ffprobe
      /usr/bin/ffserver
      /usr/bin/qt-faststart
      /usr/share
      /usr/share/doc
      /usr/share/doc/ffmpeg
      /usr/share/doc/ffmpeg/RELEASE_NOTES
      /usr/share/doc/ffmpeg/copyright
      /usr/share/ffmpeg
      /usr/share/ffmpeg/libvpx-1080p.ffpreset
      /usr/share/ffmpeg/libvpx-1080p50_60.ffpreset
      /usr/share/ffmpeg/libvpx-360p.ffpreset
      /usr/share/ffmpeg/libvpx-720p.ffpreset
      /usr/share/ffmpeg/libvpx-720p50_60.ffpreset
      /usr/share/lintian
      /usr/share/lintian/overrides
      /usr/share/lintian/overrides/ffmpeg
      /usr/share/man
      /usr/share/man/man1
      /usr/share/man/man1/ffmpeg-all.1.gz
      /usr/share/man/man1/ffmpeg-bitstream-filters.1.gz
      /usr/share/man/man1/ffmpeg-codecs.1.gz
      /usr/share/man/man1/ffmpeg-devices.1.gz
      /usr/share/man/man1/ffmpeg-filters.1.gz
      /usr/share/man/man1/ffmpeg-formats.1.gz
      /usr/share/man/man1/ffmpeg-protocols.1.gz
      /usr/share/man/man1/ffmpeg-resampler.1.gz
      /usr/share/man/man1/ffmpeg-scaler.1.gz
      /usr/share/man/man1/ffmpeg-utils.1.gz
      /usr/share/man/man1/ffmpeg.1.gz
      /usr/share/man/man1/ffplay-all.1.gz
      /usr/share/man/man1/ffplay.1.gz
      /usr/share/man/man1/ffprobe-all.1.gz
      /usr/share/man/man1/ffprobe.1.gz
      /usr/share/man/man1/ffserver-all.1.gz
      /usr/share/man/man1/ffserver.1.gz
      /usr/share/man/man1/qt-faststart.1.gz
      /usr/share/doc/ffmpeg/changelog.Debian.gz
      

  ...of which I can assume the useful part is ’/usr/bin’ which i added to my PKG_CONFIG_PATH and still the same error when building. I am running Ubuntu 18.04 LTS. I’m at a loss and have been grinding at this for the past 2 days, any help would be GREATLY appreciated. Thank you and I’m happy to provide more needed information. As a small request, I am pretty new to Linux so if you could include as many details in command line operations as possible it would help alot.