AVS2AVI
Developed by Christophe Paris, David Leatherdale, int21h, and Moitah

AVS2AVI is a command line program that compresses video from an AviSynth script using any VFW codec.

Latest version: v1.39

More information:
New development thread (v1.32 and newer)
Original development thread

v1.39 (2004-Jul-06):
  * Destination file is now closed immediately after encoding, the XviD status
    window can be left open without keeping the file unfinished/locked
  * Changed the way the last frames are flushed when using b-frames, the last
    frame may be better quality if it is a b-frame
  * XviD status window is now closed when encoding is stopped by Ctrl+C
  * Fixed deadlock when stopping with Ctrl+C

v1.38 (2004-May-23):
  * Source information: Added frame rate, and removed bit depth for formats
    other than RGB
  * Fixed "No Recompression" not copying all AVISTREAMINFO values (i.e. FourCC)
  * Removed high priority

v1.37 (2004-May-01):
  * Added "-e" switch to exit after compressor selection. This is useful if you
    want to save compressor settings ("-s") without actually encoding.
  * "No Recompression" can now be selected by using "-c null".
  * "No Recompression" mode uses less memory.
  * Lots of code restructuring and clean-up, and small display fixes.

v1.36 (2004-Apr-27):
  * Added option to wait until the XviD status window is closed, use "-x a" to
    enable for all passes, or "-x l" to enable for the last pass only.
  * Enabled the "No Recompression" option.

v1.35 (2004-Mar-08):
  * Uses GetFileSize instead of GetFileSizeEx (should work under Win9x now)

v1.34 (2004-Mar-04):
  * Now uses internal buffering for the AVI output (it's set it to 512 KB, this
    should reduce disk activity)
  * Added "-f" switch for frontend display mode (makes it easier for people
    writing frontends to parse the info from stdout)

v1.33 (2004-Feb-25):
  * Handles window messages in the encode thread (fixes XviD status window)
  * Removed Matroska support

v1.32 (2004-Feb-23):
  * Stats is now 'instant' over the last 1-2 minutes instead of 300ms (will be
    much smoother now)... overall average is still displayed at the end
  * Fractions of a second aren't shown for elapsed time while encoding
    (clutters up display)
  * Size of encoded video is now displayed properly (was always 0 before)...
    now it will only show 0 when not in the last pass of a multi-pass encode
    (this is intended)
  * Note on the above: the size while encoding is just the size of the video
    data, at the end of the encoding it will be the total size of the file
    (including overhead)
  * Frame count/FPS at the end of encode is now displayed properly
  * Path of destination is now relative to the source (i.e. if the source is
    "c:\stuff\main.avs" and the dest is given as "new.avi", the full dest path
    will be "c:\stuff\new.avi"), same for the state file
  * If no destination is given, it will be the same as the source but with the
    proper extension (i.e. in the above example, the dest would be
    "c:\stuff\main.avi")
  * If the destination has the wrong extension (or no extension), it will be
    corrected (i.e. if the dest is given as "c:\test.avi" but '-o m' is set,
    the dest will be changed to "c:\test.avi.mkv")
  * Checks to make sure the source file exists before starting (this way you
    won't have to wait until after you select the compressor to find out the
    filename is wrong)
  * Checks to make sure you're not trying to overwrite the destination file (if
    you want to, use the '-w' switch)
  * Rewrote the command line parsing (to support some new features and fix
    bugs)
  * Fixed not completely exiting if an error occurred
  * Fixed crash if no compressor was selected (i.e. "No Recompression")... it
    still won't let you output but it exits instead of crashes :)
  * Displays the name of the format you're outputting to if it's not AVI
  * Added option for null output ('-o n'), can be used for speed testing or
    whatever
  * Fixed ReadFrame/EncodeFrame using StopRead instead of Stop
  * Misc other display and code cleanups