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Sur d’autres sites (6522)

  • trying to use fluent-ffpmeg on raspberry pi

    3 septembre 2018, par cdoern

    I am trying to use fluent ffmpeg to make a h264 file into an mp4 file. However, installing regular ffmpeg did not work since ti downloaded a very old version onto my pi. through some research i stumbled upon an ffmpeg installer on npm that installers a newer version and allows you to use it : https://www.npmjs.com/package/@ffmpeg-installer/ffmpeg however, when incorporating this into my project, PM2, the process manager I am using to run my files, throws a very stranger error :

    err._length = err.length;
    TypeError: Cannot create property '_length' on string 'Unsupported platform/architecture: linux-arm

    below is my code for converting the file

    const ffmpegPath = require('@ffmpeg-installer/ffmpeg').path;
    
var ffmpeg = require('fluent-ffmpeg');
    
ffmpeg.setFfmpegPath(ffmpegPath);
    
ffmpeg('/home/pi/Videos/video.h264').format('mp4');
    
ffmpeg.on('error', function(err) {
    
  console.log('an error happened: ' + err.message);
    
})
    
// save to file
    
ffmpeg.save('/home/pi/Videos/testmovie.mp4');

  • cmake build error with libswresample, works fine with clang

    19 août 2018, par Dan Gordon

    I’m building an FFmpeg project with CLion which uses cmake to compile the code. Everything has been working great until I started to use the libswresample library. For some reason, cmake isn’t seeing the dylib and won’t build the code.

    /Applications/CLion.app/Contents/bin/cmake/mac/bin/cmake --build /Users/user/CLionProjects/IC4D/cmake-build-debug --target all -- -j 4
    
[ 50%] Linking C executable IC4D
    
Undefined symbols for architecture x86_64:
    
  "_swr_alloc_set_opts", referenced from:
    
      _audio_decode_frame in main.c.o
    
  "_swr_convert", referenced from:
    
      _audio_decode_frame in main.c.o
    
  "_swr_free", referenced from:
    
      _audio_decode_frame in main.c.o
    
  "_swr_init", referenced from:
    
      _audio_decode_frame in main.c.o
    
  "_swr_set_compensation", referenced from:
    
      _audio_decode_frame in main.c.o
    
ld: symbol(s) not found for architecture x86_64
    
clang: error: linker command failed with exit code 1 (use -v to see invocation)
    
make[2]: *** [IC4D] Error 1
    
make[1]: *** [CMakeFiles/IC4D.dir/all] Error 2
    
make: *** [all] Error 2

    But if I run this clang code, it compiles just fine

    clang -I/usr/local/include -L/usr/local/lib -lavcodec -lavcodec -lswscale -lavformat -lswresample -lSDL2 -lavutil -o IC4D2 ../main.c

    Here’s my CMakeList.txt file :

    cmake_minimum_required(VERSION 3.10)
    
project(IC4D C)
    

    
set(CMAKE_C_STANDARD 99)
    

    
include_directories( /Users/user/CLionProjects/IC4D/include/ )
    
link_directories( /Users/user/CLionProjects/IC4D/lib/ )
    

    
find_path(AVDEVICE_INCLUDE_DIR include/libavdevice/avdevice.h)
    
find_library(AVDEVICE_LIBRARY lib/libavdevice.58.dylib)
    

    
find_path(AVFORMAT_INCLUDE_DIR include/libavformat/avformat.h)
    
find_library(AVFORMAT_LIBRARY lib/libavformat.58.dylib)
    

    
find_path(AVCODEC_INCLUDE_DIR include/libavcodec/avcodec.h)
    
find_library(AVCODEC_LIBRARY lib/libavcodec.58.dylib)
    

    
find_path(SWSCALE_INCLUDE_DIR include/libswscale/swscale.h)
    
find_library(SWSCALE_LIBRARY lib/libswscale.5.dylib)
    

    
find_path(AVUTIL_INCLUDE_DIR include/libavutil/avutil.h)
    
find_library(AVUTIL_LIBRARY lib/libavutil.56.dylib)
    

    
find_path(SWRESAMPLE_INCLUDE_DIR include/libswresample/swresample.h)
    
find_library(SWRESAMPLE_LIBRARY lib/libswresample.3.dylib)
    

    
find_package(SDL2 REQUIRED)
    

    
add_executable(IC4D main.c)
    

    
target_include_directories(IC4D PRIVATE ${SDL2_INCLUDE_DIRS} ${AVDEVICE_INCLUDE_DIR} ${AVFORMAT_INCLUDE_DIR} ${AVCODEC_INCLUDE_DIR} ${SWSCALE_INCLUDE_DIR} ${AVUTIL_INCLUDE_DIR} ${SWRESAMPLE_INCLUDE_DIR})
    
target_link_libraries(IC4D PRIVATE ${SDL2_LIBRARIES} ${AVDEVICE_LIBRARY} ${AVFORMAT_LIBRARY} ${AVCODEC_LIBRARY} ${SWSCALE_LIBRARY} ${AVUTIL_LIBRARY} ${SWRESAMPLE_LIBRARY})

    What am I doing wrong with cmake ?

    Thanks

  • Error inclunding in FFMPEG project on a Mac using clang

    3 juillet 2018, par benwiz

    I’m having trouble running the remuxing.c example code. I get the following error. I have confirmed that the files can be found in /usr/local/include. I am running macOS Sierra 10.12.6.

    $ cc -v playground/remuxing.c
    
Apple LLVM version 9.0.0 (clang-900.0.39.2)
    
Target: x86_64-apple-darwin16.7.0
    
Thread model: posix
    
InstalledDir: /Library/Developer/CommandLineTools/usr/bin
    
 "/Library/Developer/CommandLineTools/usr/bin/clang" -cc1 -triple x86_64-apple-macosx10.12.0 -Wdeprecat
    
ed-objc-isa-usage -Werror=deprecated-objc-isa-usage -emit-obj -mrelax-all -disable-free -disable-llvm-v
    
erifier -discard-value-names -main-file-name remuxing.c -mrelocation-model pic -pic-level 2 -mthread-mo
    
del posix -mdisable-fp-elim -fno-strict-return -masm-verbose -munwind-tables -target-cpu penryn -target
    
-linker-version 305 -v -dwarf-column-info -debugger-tuning=lldb -resource-dir /Library/Developer/Comman
    
dLineTools/usr/lib/clang/9.0.0 -fdebug-compilation-dir /Users/myuser/github/personal/synthesthesi
    
a -ferror-limit 19 -fmessage-length 103 -stack-protector 1 -fblocks -fobjc-runtime=macosx-10.12.0 -fenc
    
ode-extended-block-signature -fmax-type-align=16 -fdiagnostics-show-option -fcolor-diagnostics -o /var/
    
folders/8s/2xc3v8dd7zz2c2trymzybvd534bnhg/T/remuxing-819223.o -x c playground/remuxing.c
    
clang -cc1 version 9.0.0 (clang-900.0.39.2) default target x86_64-apple-darwin16.7.0
    
#include "..." search starts here:
    
#include <...> search starts here:
    
 /usr/local/include
    
 /Library/Developer/CommandLineTools/usr/lib/clang/9.0.0/include
    
 /Library/Developer/CommandLineTools/usr/include
    
 /usr/include
    
 /System/Library/Frameworks (framework directory)
    
 /Library/Frameworks (framework directory)
    
End of search list.
    
 "/Library/Developer/CommandLineTools/usr/bin/ld" -demangle -lto_library /Library/Developer/CommandLineTools/usr/lib/libLTO.dylib -no_deduplicate -dynamic -arch x86_64 -macosx_version_min 10.12.0 -o a.out /var/folders/8s/2xc3v8dd7zz2c2trymzybvd534bnhg/T/remuxing-819223.o -lSystem /Library/Developer/CommandLineTools/usr/lib/clang/9.0.0/lib/darwin/libclang_rt.osx.a
    
Undefined symbols for architecture x86_64:
    
  "_av_dump_format", referenced from:
    
      _main in remuxing-819223.o
    
  "_av_freep", referenced from:
    
      _main in remuxing-819223.o
    
  "_av_interleaved_write_frame", referenced from:
    
      _main in remuxing-819223.o
    
  "_av_mallocz_array", referenced from:
    
      _main in remuxing-819223.o
    
  "_av_packet_unref", referenced from:
    
      _main in remuxing-819223.o
    
  "_av_read_frame", referenced from:
    
      _main in remuxing-819223.o
    
  "_av_rescale_q", referenced from:
    
      _main in remuxing-819223.o
    
  "_av_rescale_q_rnd", referenced from:
    
      _main in remuxing-819223.o
    
  "_av_strerror", referenced from:
    
      _av_make_error_string in remuxing-819223.o
    
  "_av_write_trailer", referenced from:
    
      _main in remuxing-819223.o
    
  "_avcodec_parameters_copy", referenced from:
    
      _main in remuxing-819223.o
    
  "_avformat_alloc_output_context2", referenced from:
    
      _main in remuxing-819223.o
    
  "_avformat_close_input", referenced from:
    
      _main in remuxing-819223.o
    
  "_avformat_find_stream_info", referenced from:
    
      _main in remuxing-819223.o
    
  "_avformat_free_context", referenced from:
    
      _main in remuxing-819223.o
    
  "_avformat_new_stream", referenced from:
    
      _main in remuxing-819223.o
    
  "_avformat_open_input", referenced from:
    
      _main in remuxing-819223.o
    
  "_avformat_write_header", referenced from:
    
      _main in remuxing-819223.o
    
  "_avio_closep", referenced from:
    
      _main in remuxing-819223.o
    
  "_avio_open", referenced from:
    
      _main in remuxing-819223.o
    
ld: symbol(s) not found for architecture x86_64
    
clang: error: linker command failed with exit code 1 (use -v to see invocation)

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