[FFmpeg-trac] #5978(avformat:new): FFprobe calculates timecode wrong with mp4 ntsc framerates

FFmpeg trac at avcodec.org
Fri Nov 25 12:03:03 EET 2016

#5978: FFprobe calculates timecode wrong with mp4 ntsc framerates
             Reporter:  haze.ortner   |                    Owner:
                 Type:  defect        |                   Status:  new
             Priority:  normal        |                Component:  avformat
              Version:  git-master    |               Resolution:
             Keywords:  timecode mov  |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |

Comment (by cehoyos):

 Replying to [comment:6 haze.ortner]:
 > Replying to [comment:5 cehoyos]:
 > > It would be 2:58 if the timecode framerate were 60 instead of 59.
 > I see, the file is straight from a gopro camera using this gear:
 > [http://www.syncbac.com/ Timecode Systems Syncbac]
 > FCXP, Adobe Premiere CC and Vegas reads the timecode right. Vegas can be
 off by a frame sometimes.

 How can we rule out that they all read the timecode wrong?

 > If you shoot in 60fps on the gopro, the syncbac uses 29.97 ND for
 > I have more test files if that helps?

 Files with other timecode framerates may help.

Ticket URL: <https://trac.ffmpeg.org/ticket/5978#comment:7>
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