[FFmpeg-trac] #2846(undetermined:new): Two-pass libx264 -preset veryslow crashes on some MPEG-type inputs

FFmpeg trac at avcodec.org
Fri Aug 23 19:30:40 CEST 2013

#2846: Two-pass libx264 -preset veryslow crashes on some MPEG-type inputs
             Reporter:               |                    Owner:
  francois.visagie@…                 |                   Status:  new
                 Type:  defect       |                Component:
             Priority:  normal       |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:  crash        |               Blocked By:
  libx264                            |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |

Comment (by cehoyos):

 Replying to [comment:17 francois.visagie@…]:
 > {{{
 > [libx264 @ 0447f020] 2nd pass has more frames than 1st pass (3924)
 > [libx264 @ 0447f020] continuing anyway, at constant QP=36
 > frame= 3929 fps=408 q=-1.0 Lsize= 18182kB time=00:02:11.10
 bitrate=1136.1kbits/s dup=4 drop=0
 > }}}

 I may misunderstand how two-pass encoding works but I suspect this means
 that the encoding was completely broken (the statistics were wrong / did
 not match the actual encoded frames) and that aborting (without a crash as
 done with shorter input files with other presets) is much better.

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2846#comment:18>
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