AVFormatContext *pFormatCtx;

	// open input and figure out what file format it is
	if(avformat_open_input(&pFormatCtx, url, NULL, NULL) != 0) {
		fprintf(stderr, "Could not open %s\n", url);
		return;
	}

	// find info about the streams it contains
	if(av_find_stream_info(pFormatCtx) < 0) {
		av_dump_format(pFormatCtx, 0, url, 0);
		return;
	}

	// find audio stream
//	int audioStream = 1;
	int i = 0;