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

[Michael Koch]

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