Hi,
Ubuntu12.04 comes with OpenCV2.3.1 by default.I tried compiling my project with default gcc version(4.6.3).
Following linking errors occur:
warning: libavcodec.so.52, needed by /usr/local/lib/libopencv_highgui.so, not found (try using -rpath or -rpath-link)
warning: libavformat.so.52, needed by /usr/local/lib/libopencv_highgui.so, not found (try using -rpath or -rpath-link)
warning: libavutil.so.50, needed by /usr/local/lib/libopencv_highgui.so, not found (try using -rpath or -rpath-link)
warning: libswscale.so.0, needed by /usr/local/lib/libopencv_highgui.so, not found (try using -rpath or -rpath-link)
/usr/local/lib/libopencv_highgui.so undefined reference to `url_fclose@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_open_input_file@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_register_all@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_free_packet@LIBAVCODEC_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_write_header@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_new_stream@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_guess_codec@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `url_fopen@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `avcodec_close@LIBAVCODEC_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `guess_format@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_init_packet@LIBAVCODEC_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `avcodec_find_decoder@LIBAVCODEC_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_malloc@LIBAVUTIL_50'
/usr/local/lib/libopencv_highgui.so undefined reference to `avcodec_encode_video@LIBAVCODEC_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_sub_q@LIBAVUTIL_50'
/usr/local/lib/libopencv_highgui.so undefined reference to `sws_scale@LIBSWSCALE_0'
/usr/local/lib/libopencv_highgui.so undefined reference to `avcodec_find_encoder@LIBAVCODEC_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `avcodec_alloc_frame@LIBAVCODEC_52'|
/usr/local/lib/libopencv_highgui.so undefined reference to `av_rescale_q@LIBAVUTIL_50'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_find_stream_info@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_write_frame@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_close_input_file@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_seek_frame@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_write_trailer@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `sws_getContext@LIBSWSCALE_0'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_freep@LIBAVUTIL_50'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_codec_get_id@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `avpicture_get_size@LIBAVCODEC_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_set_parameters@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_read_frame@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_free@LIBAVUTIL_50'
/usr/local/lib/libopencv_highgui.so undefined reference to `dump_format@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `sws_freeContext@LIBSWSCALE_0'
/usr/local/lib/libopencv_highgui.so undefined reference to `av_alloc_format_context@LIBAVFORMAT_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `avcodec_decode_video@LIBAVCODEC_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `avcodec_open@LIBAVCODEC_52'
/usr/local/lib/libopencv_highgui.so undefined reference to `avpicture_fill@LIBAVCODEC_52'
Is there any other way than 1.Downgrading Ubuntu to an earlier version
2.Upgrading to OpenCV2.4
Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https:/
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