[Libav-user] RTSP Connection timeout

[Taha Ansari]

> this is the piece of code responsable of open the stream :
>
>     const char *filename = "rtsp://hostname/live.sdp";
>
>     av_register_all();
>     avformat_network_init();
>
>     AVFormatContext *pFormatCtx = NULL;
>
>     // Open video file
>     if (avformat_open_input(&pFormatCtx, filename, NULL, NULL) != 0){
>         std::cout << "could not open file " << filename << std::endl;
>         return -1; // Couldn't open file
>     }else{
>         std::cout << "video opened" << std::endl;
>     }
>
> The problem is that when the host is down the function avformat_open_input
> does not return any value, it just stay there forever.
>

This is a known behavior. You need to setup a callback mechanism before
calling avformat_open_input() function.

Just before avformat_open_input() call pFormatCtx->interrupt_callback =
int_cb;

where int_cb is the callback function's variable:

AVIOInterruptCB int_cb;

with following signature:

AVIOInterruptCB {
    int (*callback)(void*);
    void *opaque;
}

set the callback function and implement a timeout mechanism. In general if
you return '1' from callback it means to exit from avformat_open_input()
function, else return 0 if you want to give it some more time (perhaps also
applies to all read operations but you can take it from here).

some help here:

https://trac.ffmpeg.org/ticket/2694
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://ffmpeg.org/pipermail/libav-user/attachments/20150617/0317488c/attachment.html>