[FFmpeg-user] Repeatable resolution issue exporting mxfs, 1080p is coming out as 1088p

[William Jones]

Yeah ive treid in that and thats good but but was really hoping for a fix
in ffmpeg as than can be better added into our existing pipeline. I was so
convinced i was doing something wrong but if it is a bug then i assume not!
I will see if i can get the report into a file and off the server to file a
bug report

Thanks
Will
-------------------------------------------------------------
Will Jones
VFX Supervisor at Midas VFX
will at midasvfx.com
+447462240088


On Mon, 27 Feb 2023 at 16:15, Michael Koch <astroelectronic at t-online.de>
wrote:

> Am 27.02.2023 um 16:52 schrieb Michael Koch:
> > Am 27.02.2023 um 16:34 schrieb Michael Koch:
> >> Am 27.02.2023 um 16:07 schrieb William Jones:
> >>> Hi All,
> >>>
> >>> I'm having a big problem with ffmpeg at the moment and wanted to pry
> >>> the
> >>> minds of anyone who may know.
> >>>
> >>> Trying to export a image sequence as a .mxf file at 1920x1080, DnxHD
> >>> 115.
> >>>
> >>> Unfortunately every time I try, the resulting file comes out as
> >>> 1920x1088
> >>> which breaks our pipeline. Ive tried using scale and have tried the
> >>> source
> >>> file being different formats (image sequences or .movs etc) and
> >>> nothing has
> >>> helped so far, which is why the below  code doesnt have any scale
> >>> modifiers
> >>> in it.
> >>>
> >>> the code i have been using is below:
> >>>
> >>> ffmpeg - start_number 1000 -i *-inputfile%4d.tiff* -c:v dnxhd -r 24
> >>> -b:v115M -pix_fmt yuv422p *outputfile.mxf*
> >>>
> >>> Any help at all would be much appreciated!
> >>
> >> Seems to be a bug. The issue is reproducible with these command lines
> >> (started from a Windows batch file):
> >>
> >> ffmpeg -f lavfi -i testsrc2=s=1920x1080 -frames 10 -y image%%3d.tiff
> >> ffmpeg -i image%%3d.tiff -c:v dnxhd -r 24 -b:v 115M -pix_fmt yuv422p
> >> -y out.mxf
> >>
> >> FFprobe reports 1920x1080, but ExitTool reports 1920x1088.
> >
> > well, to be more exact ExifTool reports different values:
> > - Image Width   1920
> > - Image Height  1088
> > - Sampled Width  1920
> > - Sampled Height  1080
> > - Display Width  1920
> > - Display Height  1080
> > - Image Size  1920x1088
> >
>
> Davinci Resolve reports 1920x1080 and seems to have no problem with this
> *.mxf file.
>
> Michael
>
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