[Libav-user] How to open dshow audio input device and work with it

[gakwaya daniel]

Hi ,I want to open audio and Screen grab devices in my application ( will encode and mux them into an output video) like this 

 AVInputFormat *ifmt=av_find_input_format("gdigrab");    if(avformat_open_input(&pFormatCtx,"desktop",ifmt,&options)!=0){        printf("Couldn't open input stream.\n");        return -1;    }
   //INPUT TO CAPTURE AUDIO    AVInputFormat *ifmtAudio=av_find_input_format("dshow");
    if(avformat_open_input(&pFormatCtxAudio,"audio=MicroPhone (Realtek Hight Defini",ifmtAudio,NULL)!=0){        printf("Couldn't open input audio stream.\n");        return -1;    }
 but the audio is failing to open .Is this even the right way to open them if I plan to mux encoded streams later .This question is part of a program here:     libavcodec : how to encode with h264 codec ,with mp4 container using controllable frame rate and bitrate(through c code) 

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| libavcodec : how to encode with h264 codec ,with mp4 con...I am trying to record the screen of a pc and encode the recorded frames using h264 encoder and wrap them into a mp4 container.I want to do this because... |
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  I am working on .I am new to libav* and any assistance will be appreciated.Thanks. 
 
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