[FFmpeg-cvslog] Merge remote-tracking branch 'cehoyos/master'

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Mon May  4 17:59:45 2015 +0200| [783e94cb119052722d38df0efa248fecc53508ab] | committer: Michael Niedermayer

Merge remote-tracking branch 'cehoyos/master'

* cehoyos/master:
  lavfi/cropdetect: Fix cropdetect for > 8 bit input.
  lavf/apngenc: Fix png remuxing by using default extension apng.
  lavf/mxfenc: Write correct interlaced flag when muxing dnxhd.

Merged-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=783e94cb119052722d38df0efa248fecc53508ab
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