[FFmpeg-user] failing

[focus television]

Hi,
C:\Users\admin\Downloads\ffmpeg-20120708-git-299387e-win64-static\bin>ffmpeg 
-i
"rtmp://cp106922.live.edgefcs.net/live/asianetnews@53812 live=1" -acodec 
copy -v
codec copy  a.mp4
Can u pleasse lett me why it is failing while writing .. I can play and 
use it but it doesnt save
Could not write header for output file #0 (incorrect codec parameters 
?): Operation not permitted
WriteN, RTMP send error 10093 (46 bytes)


Any way to do this
George