[FFmpeg-trac] #8077(undetermined:open): NTSC IMX encoding in MXF not possible

FFmpeg trac at avcodec.org
Tue Aug 13 13:32:57 EEST 2019

#8077: NTSC IMX encoding in MXF not possible
             Reporter:  Thomas       |                    Owner:
  Mundt                              |
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  MXF IMX      |               Blocked By:
  regression                         |
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  0            |

Comment (by Tjoppen):

 Another part of the problem here is that libavcodec can't produce NTSC
 MPEG-2 that is always 208541 bytes per frame, since that implies a bitrate
 of 49999840.16 and libavcodec can't do fractional bitrates. A flag to make
 the encoder always produce packets of some given size would also solve
 this, but I don't know enough about the ratecontrol system to implement
 that. I tried experimenting with -rc_eq with no success.

Ticket URL: <https://trac.ffmpeg.org/ticket/8077#comment:4>
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