FFmpeg 4.3
If anyone is compiling their own version for use with IP video streams, here is a modification that adds to the av_read_frame() function a call to the avformat interrupt callback.https://gist.github.com/bsenftner/ba3d493fa36b0b201ffd995e8c...This effectively adds the ability to monitor the IP stream for unexpected termination.The current implementation of av_read_frame() will hang if, for example, a human trips over a camera's cables and the stream abruptly terminates. Without modification to the API, this change to av_read_frame() calls the avformat interrupt callback each loop through av_read_frame()'s reading of packets. All the callback needs to do is look at the time, and signal error if the time between callbacks exceeds something reasonable.I am not sure why, but this change was not accepted by the ffmpeg developers. I find it essential for working with IP video and IP video cameras.