Have problem with the local Transcoding.

When I run the cron I get this error and how can I fix this problem.

export MALLOC_CHECK_=1; /usr/local/bin/ffmpeg -v 0 -y -i 'sites/default/files/video/orginal/18' -f flv -vcodec flv -b 320k -r 24 -g 48 -s 480x270 -acodec libmp3lame -ab 64k -ac 2 -ar 22050 -pass 1 -passlogfile /tmp/ygtNx0 /tmp/AUc1tx 2>&1 malloc: using debugging hooks FFmpeg version 0.5, Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --extra-cflags=-fPIC --enable-libamr-nb --enable-libamr-wb --enable-libdirac --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libtheora --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-x11grab libavutil 49.15. 0 / 49.15. 0 libavcodec 52.20. 0 / 52.20. 0 libavformat 52.31. 0 / 52.31. 0 libavdevice 52. 1. 0 / 52. 1. 0 libswscale 0. 7. 1 / 0. 7. 1 libpostproc 51. 2. 0 / 51. 2. 0 built on Nov 6 2009 19:11:04, gcc: 4.1.2 20080704 (Red Hat 4.1.2-46) Seems stream 1 codec frame rate differs from container frame rate: 1000.00 (1000/1) -> 29.97 (30000/1001) Stream mapping: Stream #0.1 -> #0.0 Stream #0.0 -> #0.1 Press [q] to stop encoding [libmp3lame @ 0x1a57d300]lame: output buffer too small (buffer index: 9404, free bytes: 388) Audio encoding failed