well, you can open a rtsp stream from ip camera using av_open_input_file. just pass the url as rtsp:/IP:PORT//mpeg4/media.amp and you can use av_read_frame afterwards using the Format context of opened stream.
On Thu, Feb 4, 2010 at 2:17 PM, Miguel Angel Arcos <[email protected]>wrote: > But I've been reading about the av_read_frame and I understand, maybe > wrong, > that this function is when you read from a file. You need pass to this > function an AVFormatContext an that structure is init when you read from a > file with av_open_input_file. I don't understand where I need to init this > if I recieve the data from an IP Camera, using RTSP. > > 2010/2/4 sateesh babu <[email protected]> > > > Looks like you are not using av_read_frame to read a packet from the > stream > > coming from IP camera. > > > > On Thu, Feb 4, 2010 at 12:49 PM, Miguel Angel Arcos > > <[email protected]>wrote: > > > > > Hi developers, > > > > > > I'm working with avcodec and I'm having some troubles to decode frame > > data > > > from an IP Camera. First, after init the library correctly I do the > next: > > > > > > /* My Code */ > > > avcodec_init(); > > > avcodec_register_all(); > > > pCodec = avcodec_find_decoder(CODEC_ID_H264); > > > > > > if pCodec is OK > > > avcodec_alloc_context(MyContext) > > > avcodec_get_context_defaults(MyContext) > > > MyContext->width = CamWidth > > > MyContext->height = CamHeight > > > MyContext->pix_fmt = PIX_FMT_RGB32; /*/ I'm not completely sure about > > it* > > > avcodec_open(MyContext,pCodec) > > > > > > if avcodec_open(MyContext,pCodec) is OK > > > avcodec_alloc_frame(MyAVFrame) > > > avcodec_get_frame_defaults(MyAVFrame) > > > av_init_packet(MyAVPacket) > > > MyAVPacket->size = CamSizeImage; > > > MyAVPacket->data= CompressedBuffer; > > > *ret = > > avcodec_decode_video2(MyContext,MyAVFrame,got_picture,MyAVPacket) > > > * //* Problem!!* > > > > > > The last line return -1 and got_picture 0. I revised all the parameters > > in > > > MyContext and I can't see where is the problem. Any suggestions? > > > > > > Thanks in advance. > > > > > > -- > > > Miguel Angel Arcos > > > _______________________________________________ > > > libav-user mailing list > > > [email protected] > > > https://lists.mplayerhq.hu/mailman/listinfo/libav-user > > > > > > > > > > > -- > > Sateesh > > _______________________________________________ > > libav-user mailing list > > [email protected] > > https://lists.mplayerhq.hu/mailman/listinfo/libav-user > > > > > > -- > Miguel Angel Arcos > _______________________________________________ > libav-user mailing list > [email protected] > https://lists.mplayerhq.hu/mailman/listinfo/libav-user > -- Sateesh _______________________________________________ libav-user mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/libav-user
