The ffmpeg console outputs the following (and hangs after the last line): FFmpeg version git-6a1265c, Copyright (c) 2000-2008 Fabrice Bellard, et al. configuration: --enable-gpl --enable-memalign-hack --enable-shared --disable-static --enable-avfilter --disable-libgsm --disable-swscale libavutil version: 49.7.0 libavcodec version: 51.58.0 libavformat version: 52.16.0 libavdevice version: 52.0.0 libavfilter version: 0.0.0 built on Jul 7 2008 10:31:12, gcc: 4.2.1-sjlj (mingw32-2) [avi @ 649BEA1C]non-interleaved AVI I have to abort using Ctrl+C at this point. Using libav functions from the DLLs and stepping through the code, I can see that av_find_stream_info() never returns. My e-mail is dennisv@conceiva.com P.S. Sorry for the content of the file - I just pass on what I get from users with problems...