id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc	blockedby	blocking	reproduced	analyzed
1762	mp4 file with 2 'mp4a' boxes in a 'stsd' box	chungying		"Summary of the bug:
There is a mp4 file with 2 'mp4a' boxes in a 'stsd' box.

Acording to ISO IEC 14496-12, the 'sample_description_index' field in 'tfhd' box gives the index of the sample entry in 'stsd' box.

However, in 'ff_mov_read_stsd_entries' always takes the information of the last 'mp4a' box instead of read the 'sample_description_index' field.

Maybe the information of stsd can be recorde as a list and apply the information indexed by 'sample_description_index'.



How to reproduce:
The file I attached always without sound output.
Since the value of 'sample_description_index' field in this file is '1', but the information applied is in the second 'mp4a' box. (The number of entries start from 1.)"	enhancement	new	wish	avformat	unspecified		mov mp4a stsd				0	0