[FFmpeg-trac] #11126(ffmpeg:new): Filter "setpts=PTS-STARTPTS" in 2-pass may cause abnormal bitrate allocation (was: Filter "setpts=PTS-STARTPTS" in 2-pass VP9 may cause abnormal bitrate allocation)

[FFmpeg]

#11126: Filter "setpts=PTS-STARTPTS" in 2-pass may cause abnormal bitrate
allocation
-------------------------------------+-------------------------------------
             Reporter:  Saul Baker   |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  ffmpeg
              Version:  git-master   |               Resolution:
             Keywords:  regression   |               Blocked By:
  setpts 2-pass                      |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Changes (by MasterQuestionable):

 * keywords:  regression 2-pass => regression setpts 2-pass
 * summary:
     Filter "setpts=PTS-STARTPTS" in 2-pass VP9 may cause abnormal bitrate
     allocation
     =>
     Filter "setpts=PTS-STARTPTS" in 2-pass may cause abnormal bitrate
     allocation

Comment:

 ͏    Would you further confirm it's irrelevant with VP9?

 ͏    What about using the passlog generated without "setpts" of "-pass 1",
 as reference for "-pass 2"..?
 ͏    Or generating the 2-pass video first, process the timestamps then
 after?
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Ticket URL: <https://trac.ffmpeg.org/ticket/11126#comment:18>
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