[Libav-user] avformat_open_input cannot return

[baneyue]

Hi:
	
	I'm working with http video stream using ffmpeg library, when i use
	`avformat_open_input` to open the stream, the function will never
	return on some video stream urls.

	I tested my video stream source and it was the server side problem,
	but should it return failure in this situation anyway, rather than
	blocking forever?

Thanks
bane yue