[FFmpeg-trac] #422(avcodec:new): x264 preset and tune options always reset certain ffmpeg params to defaults

[FFmpeg]

#422: x264 preset and tune options always reset certain ffmpeg params to defaults
---------------------+-------------------------
 Reporter:  takis    |        Type:  defect
   Status:  new      |    Priority:  normal
Component:  avcodec  |     Version:  git-master
 Keywords:           |  Blocked By:
 Blocking:           |  Reproduced:  0
 Analyzed:  0        |
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 When using ffmpeg with libx264, certain options are always reset to the
 default x264 values:
 ffmpeg -i /srv/files/videos/test/frame%06d.png -vcodec libx264 -preset
 ultrafast -g 16 test.ts

 The GOP-size here will be 250 instead of the requested 16.

 This is because in X264_init(), the ffmpeg options are set (GOP-size on
 line 233), but on line 313 x264_param_default_preset() is invoked, which
 in turn invokes x264_param_default() which sets the GOP size to 250 on
 line 76 (of x264.git/common/common.c).

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/422>
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