[Libav-user] ffmpeg static library linking issue

[jan hölscher]

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

> C language
>
>
> On Tue, Feb 7, 2012 at 3:20 PM, jan hölscher <jan.hoelscher at codergrid.de>
> wrote:
> > 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
> >
> >
> >
> >
> > --
> > Media Encoding Cluster,
> > the first Open Source Cluster Encoding Solution
> > for distributed Media Encoding.
> >
> >
> > _______________________________________________
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> > Libav-user at ffmpeg.org
> > http://ffmpeg.org/mailman/listinfo/libav-user
> >
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>

what output did you get when executing the

pkg-config --libs --cflags libavutil
pkg-config --libs --cflags libswscale
pkg-config --libs --cflags libavcodec
pkg-config --libs --cflags libavformat

commands
-- 
*Media Encoding Cluster <http://codergrid.de>, *
*the first Open Source Cluster Encoding Solution *
*for distributed Media Encoding.*
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