Did you try wrapping the include of avcodec.h in extern "C" like so:
extern "C" {
#include <libavcodec/avcodec.h>
}
On 4/12/2010 12:08 PM, Robert Conner wrote:
I cannot for the life of me get libavcodec to fully link to a small
program I'm trying to write.
Here is a super simple hello world type program
"""
#include<libavcodec/avcodec.h>
int main(int argc, char **argv) {
AVCodec *codec;
avcodec_init();
}
"""
And I compile this like this. And no matter what I do I get this
"undefined reference to `avcodec_init()'" error. I cannot get rid of
it. I've tried installing libavcodec with apt-get, I've tried
compiling it and building it myself and linking to it. I've tried
several versions of libavcodec, I've tried it with libavformat. No
matter what I do, I always get this same error. What am I doing wrong?
(I'm on Ubuntu). Thank you so much for any help!! This is driving me
nuts, I've been on it for days trying everything I could think of or
find on the internet.
"""
> g++ -I./ffmpeg -c -o example.o example.cpp
> g++ -L./ffmpeg/libavcodec -L./ffmpeg/libavutil -Wl,-E -o example
example.o -lavcodec -lavutil
example.o: In function `main':
example.cpp:(.text+0x7): undefined reference to `avcodec_init()'
collect2: ld returned 1 exit status
"""
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