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• Cannot find library using gcc -shared in Eclipse to build a dll

  26 septembre 2015, par tishu

  I am trying to use the FFMPEG library that I just compiled on Windows using MinGW in a C program in Eclipse. I have managed to build a simple HelloJNI.c file and run it :

  gcc $(INCLUDES) -c -g -w HelloJNI.c
  
  gcc -shared -o $(BIN_DIR)/hello.dll HelloJNI.o

  I am now trying to compile a ffmpeg_native.c file that uses FFMPEG but I am getting errors running the following :

  LIBRARY_PATH = -L:"c:/Dev/msys-1.0/local/lib" -L:"c:/Dev/msys-1.0/local"
  
  INCLUDES = -I$(SRC_DIR) -I"c:/Dev/msys-1.0/local/include" -I"c:/Program Files/Java/jdk1.8.0_45/include" -I"c:/Program Files/Java/jdk1.8.0_45//include/win32"
  
  BIN_DIR = ../bin
  
  
  
  gcc $(INCLUDES) -c -g -w ffmpeg_native1.1.4.c
  
  gcc -shared -o $(BIN_DIR)/exportnative.dll ffmpeg_native1.1.4.o $(LIBRARY_PATH) -lffmpeg -lavcodec -lx264 -lavformat -lavutil -lswscale

  The first line runs fine but the second shows this output :

  c:/Dev/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.9.3/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lavcodec
  
  [etc for all libraries]

  I am puzzled as I am able to run the following in MinGW with success :

  ld -o /local/libffmpeg.so -L/local/lib -lavcodec -lx264 -lavformat -lavutil -lswscale

• FFMpeg Unable to find suitable output format [duplicate]

  15 septembre 2015, par Steven

  This question already has an answer here :

  • ffmpeg : Unable to find a suitable output format for ’–i’
    
    1 answer
    

  I would like to capture a single image from my webcam using FFMpeg but the following command returns with an error. Any ideas ?

  ffmpeg -f dshow -i video="Integrated Webcam" -t 1 –r 25 c:\temp\image%d.jpg

  Here is the text from the command line window.

  C:\Users\User\Downloads\FFMPeg\ffmpeg-20150915-git-8e92462-win64-static\bin>f
  
  fmpeg -f dshow -i video="Integrated Webcam" -t 1 -r 25 c:\temp\image%d.jpg
  
  ffmpeg version N-75287-g8e92462 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
  
  enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
  
  ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
  
  le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
  
  able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
  
  ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
  
   --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
  
  e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena
  
  ble-decklink --enable-zlib
  
    libavutil      55.  2.100 / 55.  2.100
  
    libavcodec     57.  1.100 / 57.  1.100
  
    libavformat    57.  0.100 / 57.  0.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6.  3.100 /  6.  3.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.100 /  2.  0.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, dshow, from 'video=Integrated Webcam':
  
    Duration: N/A, start: 417955.980000, bitrate: N/A
  
      Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x480, 30 tbr,
  
  10000k tbn, 30 tbc
  
  [NULL @ 000000000304a5e0] Unable to find a suitable output format for 'ΓÇôr'
  
  ΓÇôr: Invalid argument

• ffmpeg in Python subprocess - Unable to find a suitable output format for 'pipe :'

  12 juillet 2016, par Spencer

  Trying to burn subs into video with ffmpeg via Python. Works fine in the command line, but when calling from Python subprocess with :

  p = subprocess.Popen('cd ~/Downloads/yt/; ffmpeg -i ./{video} -vf subtitles=./{subtitles} {out}.mp4'.format(video=vid.replace(' ', '\ '), subtitles=subs, out='out.mp4'), shell=True)

  I get :

  Unable to find a suitable output format for 'pipe:'

  Full traceback :

  'ffmpeg version 2.7.2 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.7.2_1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libvpx --enable-libass --enable-libfdk-aac --enable-nonfree --enable-vda
  
    libavutil      54. 27.100 / 54. 27.100
  
    libavcodec     56. 41.100 / 56. 41.100
  
    libavformat    56. 36.100 / 56. 36.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 16.101 /  5. 16.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.100 /  1.  2.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './OnHub - a router for the new way to Wi-Fi-HNnfHP7VDP8.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.36.100
  
    Duration: 00:00:53.94, start: 0.000000, bitrate: 2092 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 1961 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  [NULL @ 0x7fc07b077600] Unable to find a suitable output format for 'pipe:'
  
  pipe:: Invalid argument'