[FFmpeg-trac] #4643(undetermined:new): Multiple "Past duration 0.XXXXXX too large" and "dup=0 drop=1" messages when reencoding a H.264 source to x264

[FFmpeg]

#4643: Multiple "Past duration 0.XXXXXX too large" and "dup=0 drop=1" messages
when reencoding a H.264 source to x264
-------------------------------------+-------------------------------------
             Reporter:  birdie       |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:
              Version:  2.7          |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by birdie):

 It gets worse later on:

 {{{
 Past duration 0.973015 too large
 Past duration 0.973595 too large
 Past duration 0.974174 too large
 Past duration 0.974770 too large   81085kB time=00:03:15.56
 bitrate=3396.6kbits/s dup=0 drop=2
 Past duration 0.975349 too large
 Past duration 0.975929 too large
 }}}

 Two frames are dropped every half a second. That's unacceptable.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4643#comment:2>
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