Hi I have looked through these tutorials before, they dont mention RTSP streams in them. Thanks for the response!
Date: Wed, 30 Jul 2014 11:45:53 +0800 From: [email protected] To: [email protected] Subject: Re: [Libav-user] FFMPEG RTSP streaming in C I think you could refer to the following tutorial1 with ffmpeg 2.2.1. Thanks. https://github.com/chelyaev/ffmpeg-tutorial 2014-07-30 9:48 GMT+08:00 Neerav Patel <[email protected]>: Hi I am attempting to stream my webcam via rtsp to VLC on another PC, I know it is possible with ffmpeg, but there is no documentation etc. that I could find to help with this. Any help would be greatly appreciated! Neerav I am trying to do the following: AVFormatContext *oc; const char *filename = "rtsp://127.0.0.1:8554/test"; avformat_alloc_output_context2(&oc, NULL, "rtsp", NULL); if (!oc) { printf("Could not deduce output format from file extension: using MPEG.\n"); avformat_alloc_output_context2(&oc, NULL, "mpeg", filename); } AVOutputFormat *fmt; AVStream *video_st; AVCodec *video_codec; fmt = oc->oformat; int out_codec = fmt->video_codec; video_st = add_stream(oc, &video_codec, fmt->video_codec); open_video(oc, video_codec, video_st); char errorBuff[80]; if (!(fmt->flags & AVFMT_NOFILE)) { <------------------------------------ IT NEVER GOES INTO THIS DUE TO THIS CONDITION FAILING int ret = avio_open(&oc->pb, filename, AVIO_FLAG_WRITE); if (ret < 0) { fprintf(stderr, "Could not open outfile '%s': %s",filename,av_make_error_string(errorBuff,80,ret)); return 1; } } // ------------------------------------------- add_stream and open_video functions static AVStream *add_stream(AVFormatContext *oc, AVCodec **codec, enum AVCodecID codec_id) { AVCodecContext *c; AVStream *st; /* find the encoder */ *codec = avcodec_find_encoder(codec_id); if (!(*codec)) { fprintf(stderr, "Could not find encoder for '%s'\n", avcodec_get_name(codec_id)); exit(1); } st = avformat_new_stream(oc, *codec); if (!st) { fprintf(stderr, "Could not allocate stream\n"); exit(1); } st->id = oc->nb_streams-1; c = st->codec; switch ((*codec)->type) { case AVMEDIA_TYPE_AUDIO: c->sample_fmt = (*codec)->sample_fmts ? (*codec)->sample_fmts[0] : AV_SAMPLE_FMT_FLTP; c->bit_rate = 64000; c->sample_rate = 44100; c->channels = 2; break; case AVMEDIA_TYPE_VIDEO: c->codec_id = codec_id; if(codec_id == CODEC_ID_H264) printf("Codec ID %x", (AVCodecID)codec_id); c->bit_rate = 400000; /* Resolution must be a multiple of two. */ c->width = 320*5; c->height = 720; /* timebase: This is the fundamental unit of time (in seconds) in terms * of which frame timestamps are represented. For fixed-fps content, * timebase should be 1/framerate and timestamp increments should be * identical to 1. */ c->time_base.den = 25; c->time_base.num = 1; c->gop_size = 12; /* emit one intra frame every twelve frames at most */ c->pix_fmt = AV_PIX_FMT_YUV420P; if (c->codec_id == AV_CODEC_ID_MPEG2VIDEO) { /* just for testing, we also add B frames */ c->max_b_frames = 2; } if (c->codec_id == AV_CODEC_ID_MPEG1VIDEO) { /* Needed to avoid using macroblocks in which some coeffs overflow. * This does not happen with normal video, it just happens here as * the motion of the chroma plane does not match the luma plane. */ c->mb_decision = 2; } break; default: break; } /* Some formats want stream headers to be separate. */ if (oc->oformat->flags & AVFMT_GLOBALHEADER) c->flags |= CODEC_FLAG_GLOBAL_HEADER; return st;} static AVFrame *frame;static AVPicture src_picture, dst_picture; static void open_video(AVFormatContext *oc, AVCodec *codec, AVStream *st){ int ret; AVCodecContext *c = st->codec; /* open the codec */ ret = avcodec_open2(c, codec, NULL); if (ret < 0) { fprintf(stderr, "Could not open video codec: "); exit(1); } /* allocate and init a re-usable frame */ frame = av_frame_alloc(); if (!frame) { fprintf(stderr, "Could not allocate video frame\n"); exit(1); } frame->format = c->pix_fmt; frame->width = c->width; frame->height = c->height; /* Allocate the encoded raw picture. */ ret = avpicture_alloc(&dst_picture, c->pix_fmt, c->width, c->height); if (ret < 0) { fprintf(stderr, "Could not allocate picture: "); exit(1); } /* If the output format is not YUV420P, then a temporary YUV420P * picture is needed too. It is then converted to the required * output format. */ if (c->pix_fmt != AV_PIX_FMT_YUV420P) { ret = avpicture_alloc(&src_picture, AV_PIX_FMT_YUV420P, c->width, c->height); if (ret < 0) { fprintf(stderr, "Could not allocate temporary picture:"); exit(1); } } /* copy data and linesize picture pointers to frame */ *((AVPicture *)frame) = dst_picture;} _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
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