[FFmpeg-user] Require 7.1 channel inputs (wma, aac and eac3) for downmixing in ffmpeg

[rohit a]

Hi,

I am doing some experiments regarding downmixing of 7.1 channel to stereo
using ffmpeg.
Can anyone please give me some link, from where i can download 7.1 channel
wma, aac and eac3 input test vectors ?
I searched the net, but could not find any good link.

Regards,
Rohit