Recherche avancée

Sur d’autres sites (4436)

• How to open file name contain special characters in FFmpeg ?

  28 janvier 2015, par Alen Lee

  my project process the video by FFmpeg libarary, I test the my code with file which the file name contains special characters(like ’()+,-.09@A[]^_`a{} ®,Ѐ,ऄ, ఆ, Ⴀ,ᐁ,ᣀ,ᴀ,₠,⓪,⭙,ⶀ,㈀,啊.mp4’), but it failed to open the video stream at avformat_open_input().

  I test it via ffmpeg.exe with command line, it can open the file successfully.

  This is my code snippet :

      AVFormatContext *pFormatCtx = NULL;
  
      AVCodecContext  *pCodecCtx = NULL;
  
      AVFrame         *pFrameRGB = NULL;
  
      unsigned int    i, videoStream;
  
      AVCodec         *pCodec;
  
      AVFrame         *pFrame;
  
      AVPacket        packet;
  
      int             frameFinished;
  
      int             numBytes;
  
      uint8_t         *buffer;
  
      AVPixelFormat   ImgFmt = AV_PIX_FMT_YUV420P;
  
  
  
      // Register all formats and codecs
  
      av_register_all();
  
  
  
      // Open video file
  
      if (avformat_open_input(&pFormatCtx, inputFilePath, NULL, NULL) != 0)
  
      {
  
          printf("Couldn't open file.");
  
          return -1;
  
      }

  it occur error at the avformat_open_input(), I think it failed because of the Unicode file name string

  Anybody can help me ?

  Thanks

• 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();
  
  }

• Looking for a multimedia SDK (open source or paid) which can play audio (.mp3, .aac) and video (.mp4 etc.)

  8 avril 2022, par AhmadH

  I would like to embed audio (and video) files in my cross platform application.
Searching for an SDK with below functionality :

  


  

  1. Play audio - .mp3,.aac (are must) & other common formats

  


  2. Play video - .mp4 & other common formats

  


  3. Audio recording would be an added advantage.

  


  4. Open source or affordable price

  


  


  [ Note : FFmpeg is not an option due to some License restriction]

  


  **Anything that has all FFmpeg properties would be ideal.

  


  Looking online but haven't found any suitable option.
Please help.