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• ffmpeg : don't truncate getmaxrss value

  11 juillet 2024, par Gyan Doshi

  ffmpeg : don't truncate getmaxrss value
  Can lead to printing of nonsensical negative memory usage
  

  • [DH] fftools/ffmpeg.c

• Open stream with FFmpeg libavformat exits with I/O error after once in Android Application

  15 février 2015, par miazima

  I am trying to open a video stream in an android application. The first time I open the stream, the stream is opened and everything runs fine. However, if I press back and open the stream again, the app crashes.

  I am a newbie to this, so I used log statements to see if the argument values for the methods could lead me to the issue. I figured out that avformat_open_input(&ic, is->filename, is->iformat, NULL) is returning I/O error. However I can’t figure out where the error lies, the filename and the format is the same but am not sure about the &ic which is from is->ic = (AVFormatContext*) avformat_alloc_context(), I would appreciate any help !

  void get_video_info(int p_debug, const char* path) {
  
  
  
      int flags;
  
      //VideoState *is;
  
      int err, i, orig_nb_streams, ret;
  
      isquit = 0;
  
      av_log_set_flags(AV_LOG_SKIP_REPEATED);
  
      int st_index[3];
  
      st_index[AVMEDIA_TYPE_AUDIO]=-1;
  
      st_index[AVMEDIA_TYPE_VIDEO]=-1;
  
      /* register all codecs, demux and protocols */
  
      avcodec_register_all();
  
  #if CONFIG_AVDEVICE
  
      avdevice_register_all();
  
  #endif
  
  #if CONFIG_AVFILTER
  
      avfilter_register_all();
  
  #endif
  
      av_register_all();
  
  #if CONFIG_NETWORK
  
      ret = avformat_network_init();
  
  #endif
  
       if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) {
  
              fprintf(stderr, "Could not initialize SDL - %s\n", SDL_GetError());
  
              exit(1);
  
            }
  
  
  
      av_init_packet(&flush_pkt);
  
      flush_pkt.data = "FLUSH";
  
  
  
      // open video stream
  
      is = av_mallocz(sizeof(VideoState));
  
      if (!is) {
  
          do_exit(NULL);
  
          return;
  
      }
  
  
  
      is->abort_request = 0; // FIXME: abort_request changes when on closing or exit
  
      is->pictq_mutex = SDL_CreateMutex();
  
      is->pictq_cond = SDL_CreateCond();
  
      is->pictq_size = 0;
  
      is->pictq_rindex = 0;
  
      is->pictq_windex = 0;
  
      is->av_sync_type = av_sync_type;//AV_SYNC_AUDIO_MASTER;//
  
  
  
      if(path != NULL)
  
      {
  
          av_strlcpy(is->filename, path, sizeof(is->filename));
  
      }
  
      else
  
      {
  
          if(streamProtocal==0) {
  
              av_strlcpy(is->filename, "/sdcard/download/sdp_file.sdp", sizeof(is->filename));
  
          }
  
          else
  
          {
  
              av_strlcpy(is->filename, "udp://@:3001", sizeof(is->filename));
  
              is->iformat = av_find_input_format("m4v");
  
          }
  
      }
  
      is->ic = (AVFormatContext*) avformat_alloc_context();
  
      //It is assumed that server always sends m4v data, so that codec search can be avoided
  
      AVFormatContext *ic = is->ic;
  
  
  
      if ((err = avformat_open_input(&ic, is->filename, is->iformat, NULL))
  
              != 0) {
  
          LOGE(1, "Error open video file: %s", is->filename);
  
          char* error = (char*)malloc(1024);
  
          av_strerror(err, error, 1024);
  
          LOGE(1, "Error open video file: %s", error);
  
          do_exit(is);
  
      }
  
      LOGE(1, "entered get_video_info");
  
      is->ic = ic;
  
  
  
      orig_nb_streams = ic->nb_streams;
  
      if ((err = avformat_find_stream_info(is->ic, NULL)) < 0) {
  
          LOGE(1, "Error find stream information: %d", err);
  
          return;
  
      }
  
      LOGE(1, "avformat_find_stream_info");
  
      if(is->ic->pb)
  
          is->ic->pb->eof_reached= 0;//FIXME hack, ffplay maybe should not use url_feof() to test for the end
  
      AVCodec *lvideoCodec;
  
  
  
  int g_audio_file_type = 0;
  
      // Find the first video stream
  
          for (i=0; iic->nb_streams; i++) {
  
              //take video stream only for video file types
  
              if (g_audio_file_type == 0)  {
  
                  if (is->ic->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO &&
  
                          st_index[AVMEDIA_TYPE_VIDEO] < 0)
  
                  {
  
                      st_index[AVMEDIA_TYPE_VIDEO]=i;
  
                  }
  
              }
  
  
  
              if(is->ic->streams[i]->codec->codec_type==AVMEDIA_TYPE_AUDIO &&
  
                      st_index[AVMEDIA_TYPE_AUDIO] < 0)
  
              {
  
                  st_index[AVMEDIA_TYPE_AUDIO]=i;
  
              }
  
  
  
          }
  
      if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
  
          stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
  
      }
  
      if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
  
          stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
  
      }
  
      if (is->video_stream < 0) {
  
          do_exit(is);
  
          return;
  
      }
  
      is->read_tid = SDL_CreateThread(read_thread, is);
  
      rgb_frame = avcodec_alloc_frame();
  
  }

• avformat/mpc8 : fix hang with fuzzed file

  3 février 2015, par wm4

  avformat/mpc8 : fix hang with fuzzed file
  This can lead to an endless loop by seeking back a few bytes after each
  
  attempted chunk read. Assuming negative sizes are always invalid, this
  
  is easy to fix. Other code in this demuxer treats negative sizes as
  
  invalid as well.
  Fixes ticket #4262.
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/mpc8.c