On 9/14/22, Dan <[email protected]> wrote: > On Wed, 14 Sep 2022 21:26:59 +0100, Carl Zwanzig <[email protected]> wrote: > >> On 9/14/2022 8:01 AM, Paul B Mahol wrote: >>> The reason of scale behavior is known and legacy. >> >> Is it documented with the filter? I don't see anything obvious about it >> at >> https://ffmpeg.org/ffmpeg-filters.html#toc-scale-1, where can a person >> find >> about this otherwise-known behavior? > > To be fair, Paul did suggest the use of the zscale filter instead of using > scale. > I actually managed to get the line to run in the end. I just needed to put > the > "zscale=w=-1:h=-1" bit at the end like this: > > ffmpeg.exe -i "input.bmp" -crf 0 -vcodec libx264 -t 5 -y "output.mp4" -vf > zscale=w=-1:h=-1 > > Unfortunately, I'm still getting the same darkening problem. The second mp4 > is darker > than the first. > > Even tried using Michael's direct colour technique combined with zscale: > > ffmpeg.exe -f lavfi -i color=0x19be0f:s=400x576 -crf 0 -vcodec libx264 -vf > zscale=w=-1:h=-1 -t 5 -y "576.mp4" > ffmpeg.exe -f lavfi -i color=0x19be0f:s=400x578 -crf 0 -vcodec libx264 -vf > zscale=w=-1:h=-1 -t 5 -y "578.mp4" > > Again, no luck. Second is darker. > > Unless I'm somehow misusing zscale (which is a possibility), it would seem > as if the > problem lies elsewhere.
If you do not use format filter after zscale it will not work correctly. > > Dan > _______________________________________________ > ffmpeg-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". > _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
