On Wed, Oct 23, 2013 at 8:52 AM, Netcoder1989 <[email protected]> wrote: > I'm in the mid of my project where I'm trying to send the audio data over RTP > using ffmpeg in VC++. > but I'm unable to do that.: > setRTPOutputAddr("192.168.100.48"); > setRTPOutputPort(9985); > av_register_all(); > avformat_network_init(); > formatCtx= avformat_alloc_context(); > > //av_dump_format(formatCtx,0,"rtp",1); > avio_open_dyn_buf(&ioctx); > avio_open(&formatCtx->pb, "rtp", AVIO_FLAG_WRITE); > //av_dump_format(formatCtx,0,"rtp",1); > formatCtx->pb = ioctx; > > rtpCtx = avformat_alloc_context(); > rtpCtx->oformat = av_guess_format("rtp",0,0); > AVStream *fakeVideo = 0; > fakeVideo = avformat_new_stream(rtpCtx,0); > avcodec_get_context_defaults3(fakeVideo->codec, NULL); > fakeVideo->codec->codec_id = AV_CODEC_ID_MPEG2TS; > rtpCtx->audio_codec_id = AV_CODEC_ID_NONE; > rtpCtx->video_codec_id = AV_CODEC_ID_MPEG2TS; > // avformat_write_header(rtpCtx,0); > > char *url = new char[1024]; > sprintf(url,"rtp://%s:%d",rtpOutputAddr,rtpOutputPort); > printf("will output to url:%s\n",url); > avio_open(&rtpCtx->pb,url,AVIO_FLAG_WRITE); > avformat_write_header(rtpCtx, NULL); > delete url; > > > if (avio_open(&formatCtx->pb, "rtp", AVIO_FLAG_WRITE) < 0) > { > fprintf(stderr, "Could not open '%s'\n", > formatCtx->filename); > return -1; > } > else > { > > printf("succeed \n"); > } > > > avformat_write_header(formatCtx, NULL); > Getting error here > > > Do any one having any idea why my program crashes here.
Without more information on the type of crash, it's hard to say. I suspect the issue may be that you don't associate any output format, streams, etc. with formatCtx, only with rtpCtx. I'm guessing that avformat_write_header() is attempting to access some part of the formatCtx structure and encountering an unexpected NULL pointer. If you run the code under a debugger, you should be able to determine exactly what field is being accessed and the cause of your crash. Rob _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
