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Sur d’autres sites (6170)

  • When linking from a static ffmpeg library, lots of undefined references

    29 août 2019, par Lucas Zanella

    Here’s how I’m compiling ffmpeg :

    ./configure \
    
        --prefix=${BUILD_DIR}/desktop/x86_64 \
    
        --extra-cflags="-I$HOME/ffmpeg_build/include" \
    
        --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
    
        --enable-shared \
    
        --arch=x86_64 \
    
        --enable-vaapi \
    
        --disable-vaapi \
    
        --enable-opencl \
    
        --disable-debug \
    
        --enable-nvenc \
    
        --enable-cuda \
    
        --enable-cuvid \
    
        --enable-libvpx \
    
        --enable-libdrm \
    
        --enable-gpl \
    
        --enable-runtime-cpudetect \
    
        --enable-libfdk-aac \
    
        --enable-libx264 \
    
        --enable-openssl \
    
        --enable-pic \
    
        --extra-libs="-lpthread -lm -lz -ldl" \
    
        --enable-nonfree 
    

    
      PATH="$HOME/bin:$PATH" 
    
      make clean
    
      make -j$(nproc)
    
      make -j$(nproc) install 
    
      make -j$(nproc) distclean

    Here’s the part of my cmake that links the libraries :

    add_library(AVFORMAT_LIB STATIC IMPORTED)
    
set_target_properties(AVFORMAT_LIB PROPERTIES IMPORTED_LOCATION ${FFMPEG_LIB_DIR}/libavformat.a)
    
add_library(AVUTIL_LIB STATIC IMPORTED)
    
set_target_properties(AVUTIL_LIB PROPERTIES IMPORTED_LOCATION ${FFMPEG_LIB_DIR}/libavutil.a)
    
add_library(AVCODEC_LIB STATIC IMPORTED)
    
set_target_properties(AVCODEC_LIB PROPERTIES IMPORTED_LOCATION ${FFMPEG_LIB_DIR}/libavcodec.a)
    
add_library(SWS_SCALE_LIB STATIC IMPORTED)
    
set_target_properties(SWS_SCALE_LIB PROPERTIES IMPORTED_LOCATION ${FFMPEG_LIB_DIR}/libswscale.a)
    
add_library(SWRESAMPLE_LIB STATIC IMPORTED)
    
set_target_properties(SWRESAMPLE_LIB PROPERTIES IMPORTED_LOCATION ${FFMPEG_LIB_DIR}/libswresample.a)
    

    
add_executable(orwell ${ORWELL_SOURCES})
    

    
target_link_libraries(orwell PRIVATE 
    
    AVFORMAT_LIB AVCODEC_LIB SWS_SCALE_LIB AVUTIL_LIB SWRESAMPLE_LIB 
    
    ${ZLIB_LIBRARY} ${LIBDL_LIBRARY} ${X11_LIBRARY} ${LIB_VDPAU} ${LIB_VA} ${LIB_VA_DRM} ${LIB_VA_X11} ${LIBDRM_LIBRARY} 
    
    myRtspClient pthread ${GTKMM_LIBRARIES} ${GLEW_LIBRARY} ${GLU_LIBRARY} ${GL_LIBRARY} epoxy)

    Since the libraries are static, I shouldn’t need to relink libs like libx264, libvpxdec, libfdk-aacenc, but I’m getting them as undefined references in the linking process :

    ../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libfdk-aacdec.o): In function `fdk_aac_decode_frame':
    
libfdk-aacdec.c:(.text+0x4f): undefined reference to `aacDecoder_Fill'
    
libfdk-aacdec.c:(.text+0x6d): undefined reference to `aacDecoder_DecodeFrame'
    
libfdk-aacdec.c:(.text+0x8d): undefined reference to `aacDecoder_GetStreamInfo'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libfdk-aacdec.o): In function `fdk_aac_decode_close':
    
libfdk-aacdec.c:(.text.unlikely+0xf): undefined reference to `aacDecoder_Close'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libfdk-aacdec.o): In function `fdk_aac_decode_init':
    
libfdk-aacdec.c:(.text.unlikely+0x45): undefined reference to `aacDecoder_Open'
    
libfdk-aacdec.c:(.text.unlikely+0x82): undefined reference to `aacDecoder_ConfigRaw'
    
libfdk-aacdec.c:(.text.unlikely+0xb7): undefined reference to `aacDecoder_SetParam'
    
libfdk-aacdec.c:(.text.unlikely+0x129): undefined reference to `aacDecoder_SetParam'
    
libfdk-aacdec.c:(.text.unlikely+0x187): undefined reference to `aacDecoder_AncDataInit'
    
libfdk-aacdec.c:(.text.unlikely+0x1ac): undefined reference to `aacDecoder_SetParam'
    
libfdk-aacdec.c:(.text.unlikely+0x1d1): undefined reference to `aacDecoder_SetParam'
    
libfdk-aacdec.c:(.text.unlikely+0x1f2): undefined reference to `aacDecoder_SetParam'
    
libfdk-aacdec.c:(.text.unlikely+0x213): undefined reference to `aacDecoder_SetParam'
    
libfdk-aacdec.c:(.text.unlikely+0x22f): undefined reference to `aacDecoder_SetParam'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libfdk-aacdec.o):libfdk-aacdec.c:(.text.unlikely+0x250): more undefined references to `aacDecoder_SetParam' follow
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libfdk-aacenc.o): In function `aac_encode_close':
    
libfdk-aacenc.c:(.text+0xf9): undefined reference to `aacEncClose'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libfdk-aacenc.o): In function `aac_encode_frame':
    
libfdk-aacenc.c:(.text+0x2c1): undefined reference to `aacEncEncode'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libfdk-aacenc.o): In function `aac_encode_init':
    
libfdk-aacenc.c:(.text.unlikely+0x3c): undefined reference to `aacEncOpen'
    
libfdk-aacenc.c:(.text.unlikely+0x7c): undefined reference to `aacEncoder_SetParam'
    
libfdk-aacenc.c:(.text.unlikely+0xb8): undefined reference to `aacEncoder_SetParam'
    
libfdk-aacenc.c:(.text.unlikely+0xfa): undefined reference to `aacEncoder_SetParam'
    
libfdk-aacenc.c:(.text.unlikely+0x180): undefined reference to `aacEncoder_SetParam'
    
libfdk-aacenc.c:(.text.unlikely+0x25d): undefined reference to `aacEncoder_SetParam'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libfdk-aacenc.o):libfdk-aacenc.c:(.text.unlikely+0x28d): more undefined references to `aacEncoder_SetParam' follow
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libfdk-aacenc.o): In function `aac_encode_init':
    
libfdk-aacenc.c:(.text.unlikely+0x567): undefined reference to `aacEncEncode'
    
libfdk-aacenc.c:(.text.unlikely+0x5a1): undefined reference to `aacEncInfo'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libvpxdec.o): In function `vpx_decode':
    
libvpxdec.c:(.text+0x58): undefined reference to `vpx_codec_decode'
    
libvpxdec.c:(.text+0xa2): undefined reference to `vpx_codec_get_frame'
    
libvpxdec.c:(.text+0x10c): undefined reference to `vpx_codec_error'
    
libvpxdec.c:(.text+0x117): undefined reference to `vpx_codec_error_detail'
    
libvpxdec.c:(.text+0x19e): undefined reference to `vpx_codec_decode'
    
libvpxdec.c:(.text+0x1ae): undefined reference to `vpx_codec_error'
    
libvpxdec.c:(.text+0x1ca): undefined reference to `vpx_codec_get_frame'
    
libvpxdec.c:(.text+0x560): undefined reference to `vpx_codec_vp9_dx_algo'
    
libvpxdec.c:(.text+0x58f): undefined reference to `vpx_codec_vp8_dx_algo'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libvpxdec.o): In function `vpx_free':
    
libvpxdec.c:(.text.unlikely+0x9): undefined reference to `vpx_codec_destroy'
    
libvpxdec.c:(.text.unlikely+0x18): undefined reference to `vpx_codec_destroy'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libvpxdec.o): In function `vpx_init':
    
libvpxdec.c:(.text.unlikely+0x87): undefined reference to `vpx_codec_version_str'
    
libvpxdec.c:(.text.unlikely+0xa5): undefined reference to `vpx_codec_build_config'
    
libvpxdec.c:(.text.unlikely+0xdf): undefined reference to `vpx_codec_dec_init_ver'
    
libvpxdec.c:(.text.unlikely+0xed): undefined reference to `vpx_codec_error'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libvpxdec.o): In function `vp8_init':
    
libvpxdec.c:(.text.unlikely+0x134): undefined reference to `vpx_codec_vp8_dx_algo'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libvpxdec.o): In function `vp9_init':
    
libvpxdec.c:(.text.unlikely+0x142): undefined reference to `vpx_codec_vp9_dx_algo'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libvpxenc.o): In function `vpx_encode':
    
libvpxenc.c:(.text+0xda): undefined reference to `vpx_codec_encode'
    
libvpxenc.c:(.text+0x2b3): undefined reference to `vpx_codec_encode'
    
libvpxenc.c:(.text+0x33a): undefined reference to `vpx_codec_get_cx_data'
    
libvpxenc.c:(.text+0x3cd): undefined reference to `vpx_codec_get_cx_data'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libvpxenc.o): In function `log_encoder_error':
    
libvpxenc.c:(.text.unlikely+0x351): undefined reference to `vpx_codec_error'
    
libvpxenc.c:(.text.unlikely+0x35c): undefined reference to `vpx_codec_error_detail'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libvpxenc.o): In function `codecctl_int':
    
libvpxenc.c:(.text.unlikely+0x43a): undefined reference to `vpx_codec_control_'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libvpxenc.o): In function `vpx_init':
    
libvpxenc.c:(.text.unlikely+0x4fb): undefined reference to `vpx_codec_get_caps'
    
libvpxenc.c:(.text.unlikely+0x503): undefined reference to `vpx_codec_version_str'
    
libvpxenc.c:(.text.unlikely+0x521): undefined reference to `vpx_codec_build_config'
    
libvpxenc.c:(.text.unlikely+0x563): undefined reference to `vpx_codec_enc_config_default'
    
libvpxenc.c:(.text.unlikely+0x573): undefined reference to `vpx_codec_err_to_string'
    
libvpxenc.c:(.text.unlikely+0xc2c): undefined reference to `vpx_codec_enc_init_ver'
    
libvpxenc.c:(.text.unlikely+0xc86): undefined reference to `vpx_codec_enc_init_ver'
    
libvpxenc.c:(.text.unlikely+0xffb): undefined reference to `vpx_img_wrap'
    
libvpxenc.c:(.text.unlikely+0x1040): undefined reference to `vpx_img_wrap'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libvpxenc.o): In function `vp8_init':
    
libvpxenc.c:(.text.unlikely+0x10be): undefined reference to `vpx_codec_vp8_cx'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libvpxenc.o): In function `vp9_init':
    
libvpxenc.c:(.text.unlikely+0x10d3): undefined reference to `vpx_codec_vp9_cx'
    
../../../deps/ffmpeg/build/desktop/x86_64/lib/libavcodec.a(libvpxenc.o): In function `vpx_free':
    
...

    Why this happens ?

  • Can somebody say why that doesn't work

    6 août 2018, par atif sesu

    I want to convert webm to mp4.

    private String ffmpegApp;
    

    
public FLVConverter(String ffmpegApp) {
    
    this.ffmpegApp = ffmpegApp;
    
}
    

    
public void convert(String filenameIn, String filenameOut, int width, int height) throws IOException, InterruptedException {
    
    convert(filenameIn, filenameOut, width, height, -1);
    
}
    

    
public int convert(String filenameIn, String filenameOut, int width, int height, int quality)
    
        throws IOException, InterruptedException {
    
    ProcessBuilder processBuilder;
    
    if (quality > -1) {
    
        processBuilder = new ProcessBuilder(ffmpegApp, "-i", filenameIn, "-ar", "44100",
    
                "-s", width + "*" + height, "-qscale", quality + "", filenameOut);
    
    } else {
    
        processBuilder = new ProcessBuilder(ffmpegApp, "-i", filenameIn, "-ar", "44100",
    
                "-s", width + "*" + height, filenameOut);
    
    }
    

    
    Process process = processBuilder.start();
    

    
    InputStream stderr = process.getErrorStream();
    
    InputStreamReader isr = new InputStreamReader(stderr);
    
    BufferedReader br = new BufferedReader(isr);
    
    String line;
    
    while ((line = br.readLine()) != null) ;
    

    
    {
    
    }
    

    
    return process.waitFor();
    
}
    

    
public static void main(String[] args) throws Exception {
    
    FLVConverter FLVConverter = new FLVConverter("C:\\Users\\Casper\\Desktop\\ffmpeg\\bin\\ffmpeg.exe");
    
    FLVConverter.convert("C:\\Users\\Casper\\Desktop\\videoplayback.webm",
    
            "C:\\Users\\Casper\\Desktop\\a.mp4", 300, 200, 5);
    
}

  • Audio/Video out of sync when recording

    26 avril 2021, par spindi598

    I am recording the desktop with gdigrab and the audio with dshow, but they are out of sync.

    



    This is the first thing I tried, there was always about the same delay (about 20-30 frames) :

    



    // Command
ffmpeg -f dshow -i audio="Microphone (NVIDIA RTX Voice)" -f gdigrab -framerate 60 -offset_x 0 -offset_y 0 -video_size 1920x1080 -i desktop -c:v h264 -preset ultrafast -qp 0 C:\Videos\test2.mp4

// Bottom of debug log
Input file #0 (audio=Microphone (NVIDIA RTX Voice)):
  Input stream #0:0 (audio): 15 packets read (1323000 bytes); 15 frames decoded (330750 samples);
  Total: 15 packets (1323000 bytes) demuxed
Input file #1 (desktop):
  Input stream #1:0 (video): 223 packets read (1849663242 bytes); 223 frames decoded;
  Total: 223 packets (1849663242 bytes) demuxed
Output file #0 (C:\Videos\test2.mp4):
  Output stream #0:0 (video): 243 frames encoded; 243 packets muxed (211227447 bytes);
  Output stream #0:1 (audio): 322 frames encoded (329728 samples); 323 packets muxed (120103 bytes);
  Total: 566 packets (211347550 bytes) muxed
238 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0000028163c9c040] Statistics: 2 seeks, 810 writeouts


    



    The second thing I tried I believe fixed the audio sync issue, but I can really tell because it made the recording very laggy :

    



    // Command
ffmpeg -f gdigrab -framerate 60 -offset_x 0 -offset_y 0 -video_size 1920x1080 -i desktop -f dshow -i audio="Microphone (NVIDIA RTX Voice)" -c:v h264 -preset ultrafast -qp 0 C:\Videos\test2.mp4

// Bottom of debug log
Input file #0 (desktop):
  Input stream #0:0 (video): 112 packets read (928978848 bytes); 112 frames decoded;
  Total: 112 packets (928978848 bytes) demuxed
Input file #1 (audio=Microphone (NVIDIA RTX Voice)):
  Input stream #1:0 (audio): 12 packets read (1058400 bytes); 12 frames decoded (264600 samples);
  Total: 12 packets (1058400 bytes) demuxed
Output file #0 (C:\Videos\test2.mp4):
  Output stream #0:0 (video): 388 frames encoded; 388 packets muxed (109408287 bytes);
  Output stream #0:1 (audio): 258 frames encoded (264192 samples); 259 packets muxed (96404 bytes);
  Total: 647 packets (109504691 bytes) muxed
124 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0000019da713c040] Statistics: 2 seeks, 421 writeouts


    



    How can I sync the audio and video ?

    



    It turns out it is only the microphone that has the delay, I tried using virtual-audio-capturer device and the audio synced perfectly, but that is only the desktop audio and not the mic.

    


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