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

FFmpeg trac at avcodec.org
Thu Dec 26 18:49:58 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):

 Regarding just watching it, it's really hard to tell.  The perceptual
 limits on the human visual system are often quoted as ~40ms advanced,
 ~100ms retarded (audio against video) so this is not a reliable way to
 detect A/V sync issues until they are quite severe.  In fact I am
 attempting to debug a pipeline where the vendor did exactly this, relied
 on visible desync with predictably bad results with long-running streams.

Ticket URL: <https://trac.ffmpeg.org/ticket/8443#comment:7>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker

More information about the FFmpeg-trac mailing list