# cat *.mp4|ffmpeg -vcodec copy -acodec copy -vcodec copy -acodec copy -i - output.mp4 -newvideo -newaudio
FFmpeg version 0.6.5, Copyright (c) 2000-2010 the FFmpeg developers
  built on Jan 29 2012 17:53:48 with gcc 4.4.5 20110214 (Red Hat 4.4.5-6)
  configuration: --prefix=/usr --libdir=/usr/lib --shlibdir=/usr/lib --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i686 -mtune=atom -fasynchronous-unwind-tables' --enable-avfilter --enable-avfilter-lavf --enable-libdc1394 --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab
  libavutil     50.15. 1 / 50.15. 1
  libavcodec    52.72. 2 / 52.72. 2
  libavformat   52.64. 2 / 52.64. 2
  libavdevice   52. 2. 0 / 52. 2. 0
  libavfilter    1.19. 0 /  1.19. 0
  libswscale     0.11. 0 /  0.11. 0
  libpostproc   51. 2. 0 / 51. 2. 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x82cb880]stream 0, offset 0x30: partial file
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x82cb880]Could not find codec parameters (Video: h264, 204 kb/s)
pipe:: could not find codec parameters
[root@bender timelapse]# ^C
[root@bender timelapse]# ls *.mp4
20120910.mp4  2012092.mp4  2012094.mp4  2012096.mp4  2012098.mp4  20121010.mp4  2012102.mp4  2012104.mp4  2012106.mp4  2012108.mp4
2012091.mp4   2012093.mp4  2012095.mp4  2012097.mp4  2012099.mp4  2012101.mp4   2012103.mp4  2012105.mp4  2012107.mp4  2012109.mp4