padding top and bottom odd number: ffmpeg

[noctis90210]

i have a video with a resolution of 1920:870
i want to make it 1920:1080 by padding 105px on top (odd number) and 105px on bottom (total of 210px=even number)

i used:
pad="1920:1080:0:105"

but the result is... it add 104px on top and 106px on bottom.

i tried to use
pad="1920:1080:0:-105"

but same result...

hope someone can help me thanks and have a nice day.

[poisondeathray]

i have a video with a resolution of 1920:870
i want to make it 1920:1080 by padding 105px on top (odd number) and 105px on bottom (total of 210px=even number)

i used:
pad="1920:1080:0:105"

but the result is... it add 104px on top and 106px on bottom.

i tried to use
pad="1920:1080:0:-105"

but same result...

hope someone can help me thanks and have a nice day.

Odd numbers are not allowed if your source video has 4:2:0 chroma subsampling (color information is 1/2 width, 1/2 height; odd number divided by 2 results in non integer value - and you can't have 1/2 a pixel). One workaround is to convert to 4:4:4 (full color samples) before padding (and back to 4:2:0 if required)

-vf "format=yuv444p,pad='1920:1080:0:105',format=yuv420p"

[noctis90210]

Odd numbers are not allowed if your source video has 4:2:0 chroma subsampling (color information is 1/2 width, 1/2 height; odd number divided by 2 results in non integer value - and you can't have 1/2 a pixel). One workaround is to convert to 4:4:4 (full color samples) before padding (and back to 4:2:0 if required)

-vf "format=yuv444p,pad='1920:1080:0:105',format=yuv420p"

tested your code and it worked... thanks for sharing your knowledge...

[ProWo]

but the result is... it add 104px on top and 106px on bottom.

You will NEVER see 1 pixel height difference.