[FFmpeg-trac] #9339(undetermined:new): bff interlaced encode from progressive not working

FFmpeg trac at avcodec.org
Mon Jul 19 21:32:22 EEST 2021

#9339: bff interlaced encode from progressive not working
             Reporter:  daren        |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  bff          |               Blocked By:
  interlaced progressive             |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
 Summary of the bug:
 tff interlaced encodes of wrongly (progressive) encoded interlaced footage
 used to work. It now '''seems''' to always wrongly encode as bff but label
 (mediainfo) it as bff no matter what options are supplied.

 How to reproduce:
 % ffmpeg -i input -c:v libx264 -flags +ilme+ildct -top 1 output
 ffmpeg version n4.4
 built with GCC 11.1.0 (Arch Linux repository)

 Tried a few ffmpeg-static versions out, it breaks at 4.4-static and works
 up to 4.2.1-static (4.3.x branches were missing)
 It broke fairly recently though, couple weeks/months ago, guessing with
 ffmpeg 4.4.

 Can provide a file <2.5MB that works fine with ''-flags +ilme+ildct -top
 1'' on 4.2.1-static versions but not with n4.4/4.4-static
Ticket URL: <https://trac.ffmpeg.org/ticket/9339>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker

More information about the FFmpeg-trac mailing list