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• ffmpeg static link in Visual Studio [duplicate]

  24 avril 2019, par iz25

  This question already has an answer here :

  • What is an undefined reference/unresolved external symbol error and how do I fix it ?
    
    33 answers
    

  I have build ffmpeg static library on Windows. It seems that everything completed with success. The result of build are following files :

  libavcodec.a
  
  libavdevice.a
  
  libavfilter.a
  
  libavformat.a
  
  libavutil.a
  
  libswscale.a

  I tried to specify above files in Linker->Input in my C++ libray project, but linking fails. Following is build output :

  1>libavutil.a(samplefmt.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavutil.a(error.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavutil.a(log.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavutil.a(utils.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavutil.a(avstring.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavutil.a(bprint.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavformat.a(id3v2.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavutil.a(opt.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavutil.a(dict.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavutil.a(pixdesc.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavcodec.a(ratecontrol.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavcodec.a(qsv.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavformat.a(utils.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavformat.a(aviobuf.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavcodec.a(utils.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavcodec.a(ffv1enc.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavcodec.a(libvpxenc.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavcodec.a(exif.o) : error LNK2001: unresolved external symbol ___stdio_common_vsprintf
  
  1>libavcodec.a(libvpxenc.o) : error LNK2001: unresolved external symbol _vpx_img_wrap
  
  1>libavcodec.a(libvpxenc.o) : error LNK2001: unresolved external symbol _vpx_codec_version_str
  
  1>libavcodec.a(libvpxdec.o) : error LNK2001: unresolved external symbol _vpx_codec_version_str
  
  1>libavcodec.a(libvpxenc.o) : error LNK2001: unresolved external symbol _vpx_codec_build_config
  
  1>libavcodec.a(libvpxdec.o) : error LNK2001: unresolved external symbol _vpx_codec_build_config
  
  1>libavcodec.a(libvpxenc.o) : error LNK2001: unresolved external symbol _vpx_codec_err_to_string
  
  1>libavcodec.a(libvpxenc.o) : error LNK2001: unresolved external symbol _vpx_codec_error
  
  1>libavcodec.a(libvpxdec.o) : error LNK2001: unresolved external symbol _vpx_codec_error
  
  1>libavcodec.a(libvpxenc.o) : error LNK2001: unresolved external symbol _vpx_codec_error_detail
  
  1>libavcodec.a(libvpxdec.o) : error LNK2001: unresolved external symbol _vpx_codec_error_detail
  
  1>libavcodec.a(libvpxenc.o) : error LNK2001: unresolved external symbol _vpx_codec_destroy
  
  1>libavcodec.a(libvpxdec.o) : error LNK2001: unresolved external symbol _vpx_codec_destroy
  
  1>libavcodec.a(libvpxenc.o) : error LNK2001: unresolved external symbol _vpx_codec_control_
  
  1>libavcodec.a(libvpxenc.o) : error LNK2001: unresolved external symbol _vpx_codec_enc_init_ver
  
  1>libavcodec.a(libvpxenc.o) : error LNK2001: unresolved external symbol _vpx_codec_enc_config_default
  
  1>libavcodec.a(libvpxenc.o) : error LNK2001: unresolved external symbol _vpx_codec_encode
  
  1>libavcodec.a(libvpxenc.o) : error LNK2001: unresolved external symbol _vpx_codec_get_cx_data
  
  1>libavcodec.a(libvpxenc.o) : error LNK2001: unresolved external symbol _vpx_codec_vp8_cx
  
  1>libavcodec.a(libvpxdec.o) : error LNK2001: unresolved external symbol _vpx_codec_dec_init_ver
  
  1>libavcodec.a(libvpxdec.o) : error LNK2001: unresolved external symbol _vpx_codec_decode
  
  1>libavcodec.a(libvpxdec.o) : error LNK2001: unresolved external symbol _vpx_codec_get_frame
  
  1>libavcodec.a(libvpxdec.o) : error LNK2001: unresolved external symbol _vpx_codec_vp8_dx_algo
  
  1>libavutil.a(opt.o) : error LNK2001: unresolved external symbol ___stdio_common_vsscanf
  
  1>libavutil.a(parseutils.o) : error LNK2001: unresolved external symbol ___stdio_common_vsscanf
  
  1>libavcodec.a(h264_sei.o) : error LNK2001: unresolved external symbol ___stdio_common_vsscanf
  
  1>libavcodec.a(ratecontrol.o) : error LNK2001: unresolved external symbol ___stdio_common_vsscanf
  
  1>libavcodec.a(qsv.o) : error LNK2001: unresolved external symbol ___stdio_common_vsscanf
  
  1>libavformat.a(id3v2.o) : error LNK2001: unresolved external symbol ___stdio_common_vsscanf
  
  1>libavutil.a(log.o) : error LNK2001: unresolved external symbol ___acrt_iob_func
  
  1>libavutil.a(log.o) : error LNK2001: unresolved external symbol ___stdio_common_vfprintf

  What could be missing here ?

• Add project files for Visual Studio 2010 and later.

  6 juillet 2014, par Erik de Castro Lopo

  Add project files for Visual Studio 2010 and later.
  Also allows building for x86-64 Windows.
  Patch-from : lvqcl <lvqcl.mail@gmail.com>
  

  • [DH] FLAC-vs2010.sln
  • [DH] examples/c/decode/file/example_c_decode_file.vcxproj
  • [DH] examples/c/decode/file/example_c_decode_file.vcxproj.filters
  • [DH] examples/c/encode/file/example_c_encode_file.vcxproj
  • [DH] examples/c/encode/file/example_c_encode_file.vcxproj.filters
  • [DH] examples/cpp/decode/file/example_cpp_decode_file.vcxproj
  • [DH] examples/cpp/decode/file/example_cpp_decode_file.vcxproj.filters
  • [DH] examples/cpp/encode/file/example_cpp_encode_file.vcxproj
  • [DH] examples/cpp/encode/file/example_cpp_encode_file.vcxproj.filters
  • [DH] src/flac/flac.vcxproj
  • [DH] src/flac/flac.vcxproj.filters
  • [DH] src/flac/iffscan.vcxproj
  • [DH] src/flac/iffscan.vcxproj.filters
  • [DH] src/libFLAC++/libFLAC++_dynamic.vcxproj
  • [DH] src/libFLAC++/libFLAC++_dynamic.vcxproj.filters
  • [DH] src/libFLAC++/libFLAC++_static.vcxproj
  • [DH] src/libFLAC++/libFLAC++_static.vcxproj.filters
  • [DH] src/libFLAC/libFLAC_dynamic.vcxproj
  • [DH] src/libFLAC/libFLAC_dynamic.vcxproj.filters
  • [DH] src/libFLAC/libFLAC_static.vcxproj
  • [DH] src/libFLAC/libFLAC_static.vcxproj.filters
  • [DH] src/metaflac/metaflac.vcxproj
  • [DH] src/metaflac/metaflac.vcxproj.filters
  • [DH] src/plugin_common/plugin_common_static.vcxproj
  • [DH] src/plugin_common/plugin_common_static.vcxproj.filters
  • [DH] src/share/getopt/getopt_static.vcxproj
  • [DH] src/share/getopt/getopt_static.vcxproj.filters
  • [DH] src/share/grabbag/grabbag_static.vcxproj
  • [DH] src/share/grabbag/grabbag_static.vcxproj.filters
  • [DH] src/share/replaygain_analysis/replaygain_analysis_static.vcxproj
  • [DH] src/share/replaygain_analysis/replaygain_analysis_static.vcxproj.filters
  • [DH] src/share/replaygain_synthesis/replaygain_synthesis_static.vcxproj
  • [DH] src/share/replaygain_synthesis/replaygain_synthesis_static.vcxproj.filters
  • [DH] src/share/utf8/utf8_static.vcxproj
  • [DH] src/share/utf8/utf8_static.vcxproj.filters
  • [DH] src/share/win_utf8_io/win_utf8_io_static.vcxproj
  • [DH] src/share/win_utf8_io/win_utf8_io_static.vcxproj.filters
  • [DH] src/test_grabbag/cuesheet/test_cuesheet.vcxproj
  • [DH] src/test_grabbag/cuesheet/test_cuesheet.vcxproj.filters
  • [DH] src/test_grabbag/picture/test_picture.vcxproj
  • [DH] src/test_grabbag/picture/test_picture.vcxproj.filters
  • [DH] src/test_libFLAC++/test_libFLAC++.vcxproj
  • [DH] src/test_libFLAC++/test_libFLAC++.vcxproj.filters
  • [DH] src/test_libFLAC/test_libFLAC.vcxproj
  • [DH] src/test_libFLAC/test_libFLAC.vcxproj.filters
  • [DH] src/test_libs_common/test_libs_common_static.vcxproj
  • [DH] src/test_libs_common/test_libs_common_static.vcxproj.filters
  • [DH] src/test_seeking/test_seeking.vcxproj
  • [DH] src/test_seeking/test_seeking.vcxproj.filters
  • [DH] src/test_streams/test_streams.vcxproj
  • [DH] src/test_streams/test_streams.vcxproj.filters
  • [DH] src/utils/flacdiff/flacdiff.vcxproj
  • [DH] src/utils/flacdiff/flacdiff.vcxproj.filters
  • [DH] src/utils/flactimer/flactimer.vcxproj
  • [DH] src/utils/flactimer/flactimer.vcxproj.filters

• Basic "pass-through" use of FFmpegReader/FFmpegWriter in scikit-video

  6 février 2021, par JonathanZ supports MonicaC

  I am starting to use scikit-video and am having trouble writing files. I have reduced the problem to the simplest possible example

  


  vid_file = "6710185719062326259_stamp_25pct.mp4"
output_file = "out_temp3.mp4"
reader = skvideo.io.FFmpegReader(vid_file)
writer = skvideo.io.FFmpegWriter(output_file)
for frame in reader.nextFrame():
        writer.writeFrame(frame)
writer.close()


  


  I'm playing the files in VLC, and the vid_file is valid but the output file, though playable, is mostly big green blocks (though I can discern some details from the original video in it).

  


  My goal, or course, is to do "interesting" manipulations of the frame before I write it out, but I need to get the "no modifications" version working correctly first. I'm also going to be using this on large files, so the vread/vwrite functions that process an entire file at once are not appropriate.

  


  I'm guessing I need to set the appropriate values in the outputdict parameter for the FFmpegWriter, but there are so many that I don't know where to start. I have tried

  


  writer = skvideo.io.FFmpegWriter(output_file, outputdict={'-crf': '0', '-pix_fmt': 'rgb24'})


  


  (-crf 0 to suppress any compression, -pixfmt rgb24 as that's what FFmpegReader says it delivers by default, but these don't work either.

  


  Any ideas on how to make this work ?

  


  Here's the skvideo.io.ffprobe video information for the input file.

  


  {
    "@index": "0",
    "@codec_name": "h264",
    "@codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
    "@profile": "High",
    "@codec_type": "video",
    "@codec_time_base": "1/30",
    "@codec_tag_string": "avc1",
    "@codec_tag": "0x31637661",
    "@width": "480",
    "@height": "270",
    "@coded_width": "480",
    "@coded_height": "272",
    "@has_b_frames": "2",
    "@pix_fmt": "yuv420p",
    "@level": "21",
    "@chroma_location": "left",
    "@refs": "1",
    "@is_avc": "true",
    "@nal_length_size": "4",
    "@r_frame_rate": "15/1",
    "@avg_frame_rate": "15/1",
    "@time_base": "1/15360",
    "@start_pts": "0",
    "@start_time": "0.000000",
    "@duration_ts": "122880",
    "@duration": "8.000000",
    "@bit_rate": "183806",
    "@bits_per_raw_sample": "8",
    "@nb_frames": "120",
    "disposition": {
        "@default": "1",
        "@dub": "0",
        "@original": "0",
        "@comment": "0",
        "@lyrics": "0",
        "@karaoke": "0",
        "@forced": "0",
        "@hearing_impaired": "0",
        "@visual_impaired": "0",
        "@clean_effects": "0",
        "@attached_pic": "0",
        "@timed_thumbnails": "0"
    },
    "tag": [
        {
            "@key": "language",
            "@value": "und"
        },
        {
            "@key": "handler_name",
            "@value": "VideoHandler"
        }
    ]
}


  


  I will mention that when I ffprobe the output file the only differences I see are 1) the timing data is different, which isn't surprising, and 2) the output file has

  


      "@has_b_frames": "0",
    "@pix_fmt": "yuv444p",


  


  I'm pretty confident the reader is working okay, because if I write out the data with

  


  skimage.io.imsave('x.png', frame,  check_contrast=False)


  


  it looks good.