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Originally committed as revision 3680 to svn://svn.ffmpeg.org/ffmpeg/trunk

allocate a few bytes more for extradata so the bitstream reader if its used by the codec for parsing extardata, doesnt read over the end

Originally committed as revision 3679 to svn://svn.ffmpeg.org/ffmpeg/trunk

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Originally committed as revision 3673 to svn://svn.ffmpeg.org/ffmpeg/trunk

When bswap_32 is a macro, png images fail to decode properly, patch by (Milan Cutka <cutka>at<szm>dot<sk>)

Originally committed as revision 3672 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 3671 to svn://svn.ffmpeg.org/ffmpeg/trunk

ftp://ftp.mplayerhq.hu/MPlayer/samples/V-codecs/QPEG/VWbig6.avi with my
decoder (should appear soon) it hadn't changed palette even there are
palette change chunks in that AVI.
Here is small patch to make it work (zero number of colors to change in
that chunk actually means to change ALL colors).
patch by (Kostya <cannonball>at<bw-team>dot<com>)

Originally committed as revision 3670 to svn://svn.ffmpeg.org/ffmpeg/trunk

 -corrected wrong value in mv data
 -set correct mb_type after adjusting index
 -don't use H263 loop filter when the loop filter flag is set but when
  using the H261 encoder
 -use the same unquantizer as H263 (which is optimized btw)
 -removed unused members in H261Context
patch by (Maarten Daniels <maarten.daniels >at< luc >dot< ac >dot< be>)

regression test checksum update by me

Originally committed as revision 3669 to svn://svn.ffmpeg.org/ffmpeg/trunk

video/audio_codec_id in AVFormatParameters to override/help demuxer
av_guess_codec() to guess the default codecs based upon muxer + filename

Originally committed as revision 3668 to svn://svn.ffmpeg.org/ffmpeg/trunk

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Originally committed as revision 3659 to svn://svn.ffmpeg.org/ffmpeg/trunk

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