i am getting error while converting some videos here is detail:-

$cmd_convert_v = convert_mp4
478  $cmd_convert = /usr/bin/mencoder  '/home/amattube/public_html/video/manipur.mp4' -o  /home/amattube/public_html/flvideo/81e728d9d4/13713660441512602179.flv  -of lavf -oac mp3lame -lameopts abr:br=56 -ovc lavc -lavcopts  vcodec=flv:vbitrate=500:mbd=2:mv0:trell:v4mv:cbp:last_pred=3 -srate  22050 -ofps 24 -vf harddup
MEncoder SVN-r31628-4.1.2 (C) 2000-2010 MPlayer Team success: format: 0  data: 0x0 - 0x57387e libavformat file format detected. [lavf] stream 0: video (h264), -vid 0 [lavf] stream 1: audio (aac), -aid 0, -alang eng VIDEO:  [H264]  544x408  24bpp  9.990 fps  446.0 kbps (54.4 kbyte/s) [V] filefmt:44  fourcc:0x34363248  size:544x408  fps:9.990  ftime:=0.1001 ========================================================================== Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding) AUDIO: 48000 Hz, 2 ch, s16le, 128.0 kbit/8.33% (ratio: 16002->192000) Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio)) ========================================================================== OK, exit. Opening video filter: [expand osd=1] Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1 Opening video filter: [harddup] ========================================================================== Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264) ========================================================================== MP3 audio selected. VIDEO CODEC ID: 22 AUDIO CODEC ID: 15001, TAG: 0 Writing header... Return value: Writing header...
Running flvtool2: /usr/bin/flvtool2 -U /home/amattube/public_html/flvideo/81e728d9d4/13713660441512602179.flv

Convert  Error or converted video is less than 1 kb in size, try upload a big  video. If that do not work, verify convert command works on the server.
UPDATE `process_queue` SET                `status`='6' WHERE                `id`='1364'
ERROR: failed video conversion.