null pointer segfaults
 dont print redundant spam
 dont print prefix if reference==NULL
 class -> av_class
 dont copy AVClass to every object, its a waste of memory and not a good idea at all

Originally committed as revision 2841 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2840 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2839 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2838 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2837 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2836 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2835 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2834 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2833 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2832 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2831 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2830 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2829 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2828 to svn://svn.ffmpeg.org/ffmpeg/trunk

related cleanup

Originally committed as revision 2827 to svn://svn.ffmpeg.org/ffmpeg/trunk

simplifiations

Originally committed as revision 2826 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2825 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2824 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2823 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2822 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2821 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2820 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2819 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2818 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2817 to svn://svn.ffmpeg.org/ffmpeg/trunk

export DCT coefficients patch by (Wolfgang Hesseler <wolfgang.hesseler at imk dot fraunhofer dot de>)

Originally committed as revision 2816 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2815 to svn://svn.ffmpeg.org/ffmpeg/trunk

move AV_NOPTS_VALUE & AV_TIME_BASE from avformat.h -> avcodec.h
related fixes

Originally committed as revision 2814 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2813 to svn://svn.ffmpeg.org/ffmpeg/trunk

detect & warn if the user prvides pts only for some frames, and try to guess the missing ones

Originally committed as revision 2812 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2811 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2810 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2809 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2808 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2807 to svn://svn.ffmpeg.org/ffmpeg/trunk

(f)printf() is disallowed in libavcodec, compilation will fail now if its used, except that codecs which where added after the printf->av_log change which did ignore av_log() and used prinf are now silent and wont print anything, they should be changed to use av_log, i could do that, but its better if the orginal developer decides which AV_LOG level each message should get

Originally committed as revision 2806 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2805 to svn://svn.ffmpeg.org/ffmpeg/trunk

  - the first audio and video packs now contain only a system header and lots
  of padding.
  - no system headers in any packs other than the first ones
  - the two system headers only contain information about "their" stream
  - fixed some header values (muxrate, some flags, ...) so that they have the
  values specified by the standard
  - padding packs are inserted if the mux rate would be below 75 packs per
  second (the rate must not be below or above that value).
  - fixed the SCR of the packs
  - 20 zero bytes are now inserted at the end of each audio pack, after the
  data packet

Originally committed as revision 2804 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2803 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2802 to svn://svn.ffmpeg.org/ffmpeg/trunk