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• FFMPEG avformat_open_input returns unpopulated Format context

  21 avril 2013, par Michael IV

  I am trying to load avi and flv files programatically with FFMPEG API.The files seem to get loaded because avformat_open_input doesn't return 0 .But when inspecting AVFormatContext variable for every property in the inspector I am getting just "Unable to read memory" .Here is how I do it :

              av_register_all();
  
      avcodec_register_all();
  
      AVFormatContext *pFormatCtx=avformat_alloc_context();
  
  
  
  
  
      if(avformat_open_input(&pFormatCtx,"assest/comp1.avi",NULL,NULL) !=0)
  
      {
  
  
  
          printf("%s","Movie load Success");
  
      }else{
  
  
  
  
  
          printf("%s","Movie load Fail");
  
      }   

  I am using VisualStudio 2010 C++ compiler .Windows 7.

  UPDATE :

  Ok ,Please discard this question.I found the error.It was a stupid typo in the file directory path.

• rtsp : Use AVERROR() with errno.h error codes for error returns

  11 décembre 2019, par Martin Storsjö

  rtsp : Use AVERROR() with errno.h error codes for error returns
  This particular function is only required to return nonzero on
  
  errors, but use the common AVERROR() pattern for consistency.
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavformat/rtsp.c

• avformat : introduce AVFormatContext io_close2 which returns an int

  30 novembre 2021, par Marton Balint

  avformat : introduce AVFormatContext io_close2 which returns an int
  Otherwise there is no way to detect an error returned by avio_close() because
  
  ff_format_io_close cannot get the return value.
  Checking the return value of the close function is important in order to check
  
  if all data was successfully written and the underlying close() operation was
  
  successful.
  It can also be useful even for read mode because it can return any pending
  
  AVIOContext error, so the user don't have to manually check AVIOContext->error.
  In order to still support if the user overrides io_close, the generic code only
  
  uses io_close2 if io_close is either NULL or the default io_close callback.
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] doc/APIchanges
  • [DH] libavformat/avformat.h
  • [DH] libavformat/dashenc.c
  • [DH] libavformat/fifo.c
  • [DH] libavformat/hlsenc.c
  • [DH] libavformat/internal.h
  • [DH] libavformat/options.c
  • [DH] libavformat/segment.c
  • [DH] libavformat/tee.c
  • [DH] libavformat/utils.c
  • [DH] libavformat/version.h