and some related cleanup by me

Originally committed as revision 2677 to svn://svn.ffmpeg.org/ffmpeg/trunk

function moved to dspcontext
  mmx&mmx2 optimized
  change SSE -> SAD as default (better quality)
vbv buffer size command line option in kbyte

Originally committed as revision 2669 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2660 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2648 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2642 to svn://svn.ffmpeg.org/ffmpeg/trunk

interlaced mpeg2 encoding
  P & B frames
  rate distored interlaced mb decission
  alternate scantable support
4mv encoding fixes (thats also why the regression tests change)
passing height to most dsp functions
interlaced mpeg4 encoding (no direct mode MBs yet)
various related cleanups
disabled old motion estimaton algorithms (log, full, ...) they will either be fixed or removed

Originally committed as revision 2638 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2636 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2635 to svn://svn.ffmpeg.org/ffmpeg/trunk

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Originally committed as revision 2601 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2600 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2597 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2594 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2588 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2541 to svn://svn.ffmpeg.org/ffmpeg/trunk

cleanup

Originally committed as revision 2536 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2504 to svn://svn.ffmpeg.org/ffmpeg/trunk

this isnt complete or bugfree but its better than nothing

Originally committed as revision 2472 to svn://svn.ffmpeg.org/ffmpeg/trunk

everybody who still uses second streo track for dubbing can
     now export it.

   * void* -> DVDemuxContext* change (per Fabrice's suggestion).

   * -dv1394 capture now works in all modes.

Originally committed as revision 2458 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2456 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2409 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2408 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2404 to svn://svn.ffmpeg.org/ffmpeg/trunk

sample_aspect_ratio
aspect ratio in JPEG JFIF is SAR not DAR !
removed nonsense SAR guessing code
various related cleanups
bugs?

Originally committed as revision 2403 to svn://svn.ffmpeg.org/ffmpeg/trunk

* fixing YUV4MPEG format.

    * fixing a bug in DV codec where coded_frame was not set.

Originally committed as revision 2396 to svn://svn.ffmpeg.org/ffmpeg/trunk

* backing out the 0-sized packets patch. We have to devise a more
    sensible approach.
orginal commit by roman shaposhnik

Originally committed as revision 2379 to svn://svn.ffmpeg.org/ffmpeg/trunk

quality which was 1..31 float is now a 1..FF_LAMBDA_MAX int, and FF_QP2LAMBDA * qp can be used to convert to the new range

Originally committed as revision 2348 to svn://svn.ffmpeg.org/ffmpeg/trunk

* Fix from Charles Yates for 0 sized packets

Originally committed as revision 2341 to svn://svn.ffmpeg.org/ffmpeg/trunk

changing pix_fmt at the same time.

   * aspect ratio should be more reliable for DV now.

Originally committed as revision 2338 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2297 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2284 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2264 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2249 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2233 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2202 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2201 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2200 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2199 to svn://svn.ffmpeg.org/ffmpeg/trunk

* removes use of read_key and getchar when input is received on stdin
(this was corrupting the packet reading)
* terminates av_encode when a termination signal is received (use of
ctrl-c issued a term_exit and subsequent uses of q failed)
* specific correction to yuv4mpeg pipe reading - the defined header was
too short to allow for extended yuv4mpeg flags [as used by smil2yuv and
y4mscaler and accepted by mjpeg tools]

Originally committed as revision 2183 to svn://svn.ffmpeg.org/ffmpeg/trunk

* introducing sntsc/spal for square pixel ntsc/pal

Originally committed as revision 2177 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2150 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2146 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2143 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2129 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2114 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2098 to svn://svn.ffmpeg.org/ffmpeg/trunk

fix decoding of old %16!=0 divx
fix assertion failure in motion_est.c

Originally committed as revision 2094 to svn://svn.ffmpeg.org/ffmpeg/trunk