[Libav-user] ffmpeg static library linking issue

[jan hölscher]

Is your Library written in "C" or in "C++"?


2012/2/7 yuvaraj r <yuvaraj.tr at gmail.com>

> Hi All,
>
>
> I compiled the ffmpeg source to generate the static(.a foramt)
> libraries  in linux.
>
> When i am linking the static libraries with my application,
>
> i am getting undefined reference for many functions.
>
> Even i tried with pkg-config.
>
> Here command , what i tried
>
>
> gcc -shared -Wl,-soname,librecorder.so.1 '-Wl,-rpath,lib'  -lpthread
> -lXdamage -lXfixes -lXmu -lXi -lX11
> -L/home/peter/Desktop/screenrecorder/librecorder/src/../dependencies/lib
>  -lavformat -lavcodec -lavutil -lswscale `pkg-config --libs --cflags
> libavutil` `pkg-config --libs --cflags libswscale` `pkg-config --libs
> --cflags libavcodec` `pkg-config --libs --cflags libavformat` -o
> librecorder.so.1.1 init.o main_entry.o xtoffmpeg.o
>
>
> It is generated the librecorder library. I have all dependency libs
>
> when executing ld command
>
> #ld librecorder.so.1.1
>
> librecorder.so.1: undefined reference to `av_new_stream'
> librecorder.so.1: undefined reference to `av_read_packet'
> librecorder.so.1: undefined reference to `avcodec_alloc_frame'
> librecorder.so.1: undefined reference to `av_close_input_file'
> librecorder.so.1: undefined reference to `audio_resample'
> librecorder.so.1: undefined reference to `avcodec_find_encoder'
> librecorder.so.1: undefined reference to `av_find_input_format'
> librecorder.so.1: undefined reference to `avcodec_encode_audio'
> librecorder.so.1: undefined reference to `dump_format'
> librecorder.so.1: undefined reference to `av_open_input_file'
> librecorder.so.1: undefined reference to `avcodec_find_decoder'
> librecorder.so.1: undefined reference to `avcodec_close'
> librecorder.so.1: undefined reference to `av_find_stream_info'
> librecorder.so.1: undefined reference to `audio_resample_init'
> librecorder.so.1: undefined reference to `avpicture_get_size'
> librecorder.so.1: undefined reference to `av_register_all'
> librecorder.so.1: undefined reference to `avcodec_decode_audio'
> librecorder.so.1: undefined reference to `avcodec_open'
> librecorder.so.1: undefined reference to `avcodec_encode_video'
> librecorder.so.1: undefined reference to `av_destruct_packet_nofree'
> librecorder.so.1: undefined reference to `avpicture_fill'
> librecorder.so.1: undefined reference to `av_set_parameters'
> librecorder.so.1: undefined reference to `av_alloc_format_c
>
> Now problem with static libraries.
>
>
> #pkg-config --list-all | grep mpeg
> libswscale                       libswscale - FFmpeg image rescaling
> library
> libavutil                        libavutil - FFmpeg utility library
> libavformat                      libavformat - FFmpeg container format
> library
> libavcodec                       libavcodec - FFmpeg codec library
>
>
> How do i solve this issue
>
>
> Thanks
>
>
> Yuvaraj R
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
>



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