Q:

Error: avcodec_init();

I'll try to compile under Ubuntu 14.04.2 and I get the following error:
VideoPlayerPipHd.c: In static member function ‘static void reel::VideoPlayerPipHd::Create()’:
VideoPlayerPipHd.c:792:6: error: ‘avcodec_init’ was not declared in this scope
      avcodec_init -> avcodec_register_all;
      ^
VideoPlayerPipHd.c:793:7: error: ‘av_open_input_file’ was not declared in this scope
   av_open_input_file -> avformat_open_input;
   ^

The code is:
787     void VideoPlayerPipHd::Create()
788     {
789         if (! instance_)
790         {
791             instance_ = new VideoPlayerPipHd;
792             avcodec_init();
793             avcodec_register_all();
794         }
795     }

I tried several things but I am stuck.  Could somebody help me please? 
Thanks in advance

A:

The answer is that the ffmpeg functions are deprecated.  See the list here for example:
https://www.ffmpeg.org/doxygen/0.8/deprecated.html
For example change av_open_input_file to avformat_open_input.