[FFmpeg-trac] #288(avcodec:new): Theora encode bitrate bug.

[FFmpeg]

#288: Theora encode bitrate bug.
---------------------+------------------------
 Reporter:  igor     |        Type:  defect
   Status:  new      |    Priority:  important
Component:  avcodec  |     Version:
 Keywords:           |  Blocked By:
 Blocking:           |  Reproduced:  0
 Analyzed:  0        |
---------------------+------------------------
 In ./libavcodec/libtheoraenc.c:


 {{{
 t_info.target_bitrate = avc_context->bit_rate;
 }}}


 It's wrong!

 Right way is:
 From ffmpeg2theora
 (http://svn.xiph.org/trunk/ffmpeg2theora/src/ffmpeg2theora.c)
 {{{
 /*Account for the Ogg page overhead.
               This is 1 byte per 255 for lacing values, plus 26 bytes per
 4096 bytes for
                the page header, plus approximately 1/2 byte per packet
 (not accounted for
                here).
          */
 t_info.target_bitrate = (int) (64870 * (ogg_int64_t)avc_context->bit_rate
 >> 16);
 }}}


 Attach small path

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/288>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker