ffmpeg -deinterlace -i 1.mov -acodec mp3 -ar 22050 -ab 32 -f swf 2.swf
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2007 Fabrice Bellard, et al.
configuration: --shlibdir=/usr/lib --prefix=/usr --mandir=/usr/share/man --libdir=/usr/lib --enable-shared --enable-libmp3lame --enable-libogg --enable-libvorbis --enable-libtheora --enable-libfaad --enable-libfaac --enable-xvid --enable-liba52 --enable-libdts --enable-pp --enable-gpl --enable-vhook --enable-x11grab --enable-libgsm --enable-x264 --enable-amr_nb --enable-amr_wb
libavutil version: 49.3.0
libavcodec version: 51.34.0
libavformat version: 51.10.0
built on Feb 24 2007 14:02:16, gcc: 4.1.2 20061115 (prerelease) (SUSE Linux)
1.mov: I/O error occured
Usually that means that input file is truncated and/or corrupted.