[FFmpeg-user] Problem with converting 3gp to flv

[hno2005]

HI,

I have wrote a code which convert video files to flv but the problem is this
that it converts almost all of the files type to flv but it can’t convert
3gp to flv.

This is the command that I use:

exec( "$ffmpegpath -i uploads/$video_name -ar 22050 -ab 32 -f flv -s 320×240
uploads/a.flv", $ret );

 

Actually I have surf most of the website to find the reason but I can’t find
out the reason.

Please help me . 

Thanks every one