[FFmpeg-user] SSIM filter showing (small) differences in identical(?) streams

[Carl Eugen Hoyos]

Am Sa., 27. Feb. 2021 um 04:53 Uhr schrieb pdr0 <pdr0 at shaw.ca>:

> ffmpeg -framerate 60000/1001 -i lossless.mkv -start_number 0
> -framerate 60000/1001 -i source/%06d.tif -t 00:01:00 -lavfi
> "[0:v]settb=1/AVTB,setpts=PTS-STARTPTS[main];[1:v]settb=1/AVTB,setpts=PTS-STARTPTS[ref];[main][ref]ssim"
> -f null -

I suspect you have to remove the first "framerate",
the mkv demuxer doesn't know this option.

> For the 2nd image sequence png vs. tiff, one is rgb24(pc) , one is rgb24 .

Iirc, the ssim filter ignores this metadata difference.

Carl Eugen