Vids Not Converting

My site only takes flash videos (.flv) after I upgraded to the latest flash player all other video extensions ei .avi are shooting out errors. The videos uploaded but not playing. Queue shows error and the "Return value" shows nothing. Please help

STARTING VIDEO CONVERSION (process_queue.id = 2538)

File: /var/www/vhosts/topfreaks.com/httpdocs/video/promoshoot.wmv

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SELECT * FROM `video` WHERE `VID`=2506

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Video id: 2506

Find video duration - START

Duration (ffmpeg-php): 160

DURATION: 02:40

Create Thumbnail - START

Create Thumbnail with ffmpeg-php - END

CONVERT COMMAND: /usr/bin/mencoder '/var/www/vhosts/topfreaks.com/httpdocs/video/promoshoot.wmv' -o /var/www/vhosts/topfreaks.com/httpdocs/flvideo/12340214341834387504.flv -of lavf -oac mp3lame -lameopts abr:br=56 -ovc lavc -lavcopts vcodec=flv:vbitrate=500:mbd=2:mv0:trell:v4mv:cbp:l ast_pred=3 -srate 22050 -lavfopts i_certify_that_my_video_stream_does_not_use_b_fram es

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Return value: