[FFmpeg-user] New Overread VUI by 5 bits Warnings when decoding from AVC-Intra from Avid

[Christoph Gerstbauer]

Hello Carl, thank you for the fast answer.

I am shure the AVCI file from year 2014 can be decoded with ffmpeg 3.4
without a "HINTED" problem in the command line window.
Maybe there are problems but not visible for me as cmd line user.
The file from 2018 is the hot one with the overread VUI hints at the cmd
line output.

Best Regards
Christoph Gerstbauer


Am Mi., 6. Juni 2018 um 15:16 Uhr schrieb Carl Eugen Hoyos <
ceffmpeg at gmail.com>:

> 2018-06-06 13:09 GMT+02:00, Christoph Gerstbauer
> <christophgerstbauer at gmail.com>:
> > Hello,
> >
> > in the year 2014 I reported a Problem when decoding H264 10bit from
> > AVCIntra MXF files.
> > MXF File was created by Premiere:
> > The old thread:
> > https://lists.ffmpeg.org/pipermail/ffmpeg-user/2014-May/021213.html
> >
> > The problem was that the commandline output showed multiple error
> warnings
> > with this information: "Overread VUI by 5 bits".
> > This problem was fixed in 2014. I think it was a demuxer problem.
> >
> > Now I have the "same" problem with a MXF file from another encoder: AVID.
> > -> Again "Overread VUI by 5 bits"
> >
> > By testing with FFMPEG 3.4 we get this:
> > # May__2014: Decoding AVCIntra MXF made by Premiere: STILL GOOD.
> > No Warnings, no Errors
>
> Several errors are shown here for your old sample, they appear
> to affect decoding.
>
> > # June_2018: Decoding AVCIntra MXF made by AVID: "Overread VUI by 5 bits"
>
> These messages do not look related, they are initialization-only.
> I opened ticket #7249.
>
> > The file from May2014 can be downloaded here:
>
> > Decoding still without problems.
>
> As said above, I don't think this is true.
>
> >
> https://www.dropbox.com/s/yqtdt1enqt18wjv/ffmpeg__2014_PremierePro--Overread.VUI.by.5.bits.Problem___FIXED.mxf.zip?dl=0
> >
> > The current problem example file (June2018) can be downloaded here:
> >
> https://www.dropbox.com/s/we2fldkgyc9tjq3/ffmpeg__2018_Sample-from-AVIDSystem--Overread.VUI.by.5.bits.Problem___NEW.mxf.zip?dl=0
>
> I opened ticket #7249
>
> Carl Eugen
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Student der Fachhochschule für Telekommunikation und Medien St. Pölten
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Christoph Gerstbauer
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