2012/3/16 Anders Branderud <[email protected]>: > Hello! > > When I run the encoding example (code inserted to the following cc-file) > provided in doc/examples of the FFMpeg-library and compile it with the > line linux-y8h9:/home/anders/Programs # g++ videofecencoder.cc -lavformat > -lavcodec -lavutil > > I get the following error message: > /tmp/ccDQpTY5.o: In function `video_encode_example(char const*, int)': > videofecencoder.cc:(.text+0x30): undefined reference to > `avcodec_find_encoder(CodecID)' > videofecencoder.cc:(.text+0x75): undefined reference to > `avcodec_alloc_context3(AVCodec*)' > videofecencoder.cc:(.text+0x7d): undefined reference to > `avcodec_alloc_frame()' > videofecencoder.cc:(.text+0xfc): undefined reference to `av_opt_set(void*, > char const*, char const*, int)' > videofecencoder.cc:(.text+0x116): undefined reference to > `avcodec_open2(AVCodecContext*, AVCodec*, AVDictionary**)' > videofecencoder.cc:(.text+0x1e2): undefined reference to > `av_image_alloc(unsigned char**, int*, int, int, PixelFormat, int)' > videofecencoder.cc:(.text+0x330): undefined reference to > `avcodec_encode_video(AVCodecContext*, unsigned char*, int, AVFrame const*)' > videofecencoder.cc:(.text+0x3b3): undefined reference to > `avcodec_encode_video(AVCodecContext*, unsigned char*, int, AVFrame const*)' > videofecencoder.cc:(.text+0x464): undefined reference to > `avcodec_close(AVCodecContext*)' > videofecencoder.cc:(.text+0x46f): undefined reference to `av_free(void*)' > videofecencoder.cc:(.text+0x47c): undefined reference to `av_free(void*)' > videofecencoder.cc:(.text+0x487): undefined reference to `av_free(void*)' > /tmp/ccDQpTY5.o: In function `main': > videofecencoder.cc:(.text+0x4a8): undefined reference to > `avcodec_register_all()' > collect2: ld returned 1 exit status > > I have tried the same using two different Ubuntu-installations. The above > compilation was performed using OpenSUSE installed in a VirtualBox. I did > the above at a new installation of OpenSUSE. After installing it I > downloaded the required libraries using the libraries provided in the > Software repository called 'PackMan'.
You lack libraries' header files. Find and install packages that contain files /usr/include/libavformat/avformat.h, /usr/include/libavcodec/avcodec.h . I hope you got the point. I don't know exact package names for suse and ubuntu. -- Andrey Utkin _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
