[FFmpeg-user] Drop frames during framemd5 calculation of DPX files

Matthew Yang matthew at asianfilmarchive.org
Tue Mar 31 04:43:27 EEST 2020


Hello all

Thank you all for the suggestions.

I tried: ffmpeg -start_number 86400 -i finalDPX_forDCP\Respire%08d.dpx
*-vsync* 0 -f framemd5
allframes_md5.txt

I still get a similar result without the stated drop frames. framemd5
checksum spits out 867 frames less than total frames.

Strange..

Matthew Yang* | *Archive Officer
Asian Film Archive
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Singapore 188064
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5264
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On Thu, 26 Mar 2020 at 23:06, Gyan Doshi <ffmpeg at gyani.pro> wrote:

>
>
> On 26-03-2020 02:17 pm, Matthew Yang wrote:
> > Hello there
> >
> > I have been experiencing drop frames during calculation of framemd5
> > checksums for a bunch of DPX files.
> >
> > The command:
> >
> > *ffmpeg -start_number 86400 -i finalDPX_forDCP\Respire%08d.dpx -f
> framemd5
> > original_md5_2.txt*
> >
> > The result:
> >
> > frame=20837 fps=5.2 q=-0.0 Lsize=    1628kB time=00:14:28.20 bitrate=
> >   15.4kbits/s dup=0 *drop=867* speed=0.216x
> > video:1107194832kB audio:0kB subtitle:0kB other streams:0kB global
> > headers:0kB muxing overhead: unknown
> >
> > I ran the checksum calculation twice and it has the same exact number of
> > drop frames.
> >
> > The full results can be seen in the txt file attached.
> >
> > Please kindly advise on how I can solve this problem as I am unable to
> > resolve it on my own.
>
> Some snafu with detected fps.
>
> Use
>
>      ffmpeg -start_number 86400 -i finalDPX_forDCP\Respire%08d.dpx -vsync
> 0 -f framemd5
> allframes_md5.txt
>
>
> Gyan
>
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