FFMPEG undefined reference to `avdevice_register_all'

Question

I'm trying to build simple programm using ffmpeg

#include <stdio.h>
 #include <stdlib.h>
 #define __STDC_CONSTANT_MACROS
extern "C" {
 #include <libavcodec/avcodec.h>
 #include <libavformat/avformat.h>
 #include <libavformat/avio.h>
#include <libavdevice/avdevice.h>
#include <libavutil/time.h>
 }


#include <iostream> 


 int main( int argc, char* argv[] )
 {
   AVCodec *icodec;
  AVFormatContext *ifcx = NULL;
  AVInputFormat *ifmt;
  AVCodecContext *iccx;
   AVStream *ist;
   AVStream *ost;
   AVPacket pkt;
   int i_index;
  int64_t timenow, timestart;
   int got_key_frame = 0;

   AVFormatContext *ofcx;

   const char *sProg = argv[ 0 ];
   const char *sFileInput;
   const char *sFileOutput;
  int64_t bRunTime;

  bRunTime = atoi( argv[ 2 ] ) * 1000000;

   // Initialize library
   av_log_set_level( AV_LOG_DEBUG );
   av_register_all();
   avcodec_register_all(); 
   avformat_network_init();
   avdevice_register_all();

And i get these errors

g++ -o rtsp3 -I/usr/include -I/usr/local/include rtsp3.cpp -lavformat -lavcodec -lavutil -lm -lz -lva -lpthread /tmp/ccAXDgvi.o: In function main': rtsp3.cpp:(.text+0x115): undefined reference toavdevice_register_all' /usr/local/lib/libavformat.a(matroskadec.o): In function matroska_decode_buffer': /home/user/projects/ffmpeg-git/ffmpeg/libavformat/matroskadec.c:1242: undefined reference toBZ2_bzDecompressInit' /home/user/projects/ffmpeg-git/ffmpeg/libavformat/matroskadec.c:1257: undefined reference to BZ2_bzDecompress' /home/user/projects/ffmpeg-git/ffmpeg/libavformat/matroskadec.c:1250: undefined reference toBZ2_bzDecompressEnd' /home/user/projects/ffmpeg-git/ffmpeg/libavformat/matroskadec.c:1262: undefined reference to `BZ2_bzDecompressEnd' collect2: error: ld returned 1 exit status

I have git version of ffmpeg and successfully compiled it and make install.

proxima proxima · Accepted Answer · 2016-02-23T22:21:19

Try this, it worked for me:

gcc -o main.o main.c `pkg-config --cflags --libs libavformat libavutil`

FFMPEG undefined reference to `avdevice_register_all'

4 Answers