id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc	blockedby	blocking	reproduced	analyzed
1849	AMR NB NODATA header changes following data	krisha		"Summary of the bug:

If you put 0x7C as header (MODE = NO_DATA) the following frames behaves weird (only header, no data bytes). In Audacity with FFmpeg v0.6.2 you hear a 'knock' and the following signal wave behaves different on zooming levels and (this might be also GUI audacity bug). In VLC 2.0.3 this 'knock' is also heard.

I attached a sample file with silence and a NO_DATA frame at file offset 0x166.

I'm not sure which versions of FFmpeg are affected, but I assume all that use the codec from libavcodec/amrnbdec.c
"	defect	new	normal	avcodec	unspecified		amrnb				0	0