[FFmpeg-trac] #5978(avformat:new): FFprobe calculates timecode wrong with mp4 ntsc framerates
FFmpeg
trac at avcodec.org
Fri Nov 25 12:27:02 EET 2016
#5978: FFprobe calculates timecode wrong with mp4 ntsc framerates
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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 |
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Comment (by haze.ortner):
Replying to [comment:7 cehoyos]:
> How can we rule out that they all read the timecode wrong?
I did a spreadsheet with 4 different test files and synced them manually
against the audio that I recorded with a SoundDevices 633 which was on the
same clock. Then I noted the data, and most times they were straight on or
of by a frame. And since I filmed the actual timecode I can see that those
programs shows the same timecode that's in the picture.
> Files with other timecode framerates may help.
[https://www.dropbox.com/s/3yiribabtq7r7ob/Haze_synctest_25fps_25TC.MP4?dl=1
Haze_synctest_25fps_25TC.MP4]
[https://www.dropbox.com/s/aejusahbrzlsal8/Haze_synctest_30fps_2997TC.MP4?dl=1
Haze_synctest_30fps_2997TC.MP4]
[https://www.dropbox.com/s/rf2412cfleqw8mw/Haze_synctest_50fps_25TC.MP4?dl=1
Haze_synctest_50fps_25TC.MP4]
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Ticket URL: <https://trac.ffmpeg.org/ticket/5978#comment:8>
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