Hi, As of SVN 1666, -vfilters scale=100:50 works, but -s 100x50 (well, any HxW value except original movie size) produces a segfault. Scenario follows: $ ffmpeg -i input.avi -vfilters scale=100:50 -y output.avi FFmpeg version SVN-r11312, Copyright (c) 2000-2007 Fabrice Bellard, et al. configuration: --enable-shared --disable-static --enable-gpl --enable-pp --enable-swscaler --enable-pthreads --enable-liba52 --enable-avisynth --enable-libfaac --enable-libfaad --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-DX_DISPLAY_MISSING --cpu=prescott --enable-avfilter --build-suffix=-SVN libavutil version: 49.6.0 libavcodec version: 51.49.0 libavformat version: 52.3.0 built on Dec 24 2007 10:23:40, gcc: 4.2.2 Input #0, avi, from 'input.avi': Duration: 00:00:20.2, start: 0.000000, bitrate: 30349 kb/s Stream #0.0: Video: dvvideo, yuv420p, 720x576 [PAR 0:1 DAR 0:1], 25.00 tb(r) Stream #0.1: Audio: pcm_s16le, 48000 Hz, stereo, 1536 kb/s Output #0, avi, to 'output.avi': Stream #0.0: Video: mpeg4, yuv420p, 100x50 [PAR 0:1 DAR 0:1], q=2-31, 200 kb/s, 25.00 tb(c) Stream #0.1: Audio: mp2, 48000 Hz, stereo, 64 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop encoding frame= 507 fps= 81 q=2.4 Lsize= 727kB time=20.3 bitrate= 293.5kbits/s video:527kB audio:158kB global headers:0kB muxing overhead 6.076162% $ ffmpeg -i input.avi -s 100x50 -y output.avi FFmpeg version SVN-r11312, Copyright (c) 2000-2007 Fabrice Bellard, et al. configuration: --enable-shared --disable-static --enable-gpl --enable-pp --enable-swscaler --enable-pthreads --enable-liba52 --enable-avisynth --enable-libfaac --enable-libfaad --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-DX_DISPLAY_MISSING --cpu=prescott --enable-avfilter --build-suffix=-SVN libavutil version: 49.6.0 libavcodec version: 51.49.0 libavformat version: 52.3.0 built on Dec 24 2007 10:23:40, gcc: 4.2.2 Input #0, avi, from 'input.avi': Duration: 00:00:20.2, start: 0.000000, bitrate: 30349 kb/s Stream #0.0: Video: dvvideo, yuv420p, 720x576 [PAR 0:1 DAR 0:1], 25.00 tb(r) Stream #0.1: Audio: pcm_s16le, 48000 Hz, stereo, 1536 kb/s Segmentation fault (core dumped) Regards, Víctor