'detecting a timeout in ffmpeg

I am writing some software that uses ffmpeg extensively and it is multi threaded, with multiple class instances.

If the network connection drops out ffmpeg hangs on reading. I found a method to assign a callback that ffmpeg fires periodically to check if it should abort or not:

static int interrupt_cb(void *ctx) 
{ 

// do something 
    return 0;
} 

static const libffmpeg::AVIOInterruptCB int_cb = { interrupt_cb, NULL };

...

AVFormatContext* formatContext = libffmpeg::avformat_alloc_context( );
formatContext->interrupt_callback = int_cb; 
if ( libffmpeg::avformat_open_input( &formatContext, fileName, NULL, NULL ) !=0 ) {...}

This is all fine but nowhere on the web can i find what *ctx contains and how to determine whether the callback should return 1 or 0. I can't assign a static "abort" flag as the class has many instances. I also can't debug the code as for some reason visual studio refuses to set a breakpoint on the return 0; line, claiming no executable code is associated with the location. Any ideas?

c++ffmpeg


Solution 1:[1]

You can pass not only AVFormatContext* formatContext, but any other useful pointer to some instance, which contains useful data to determine which thread timed out.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 user438383

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