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

[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

Michael