[FFmpeg-trac] #8443(undetermined:new): A/V drift when reencoding NTSC

FFmpeg trac at avcodec.org
Fri Dec 27 02:58:38 EET 2019

#8443: A/V drift when reencoding NTSC
             Reporter:               |                    Owner:
  madscientist159                    |
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by madscientist159):

 With Blender I was able to verify the live A/V stream desync, and that it
 is shown in this example.

 If you pull each 96th flash frame (to avoid the obvious audio drifting),
 and look really carefully at the overlaid audio, you can see it's very
 slowly inching to the left (i.e. slowly advancing compared to the video).
 I can confirm the exact same problem with the live stream, both in
 magnitude and direction, so this test case seems to show two distinct
 issues within ffmpeg.

Ticket URL: <https://trac.ffmpeg.org/ticket/8443#comment:10>
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