> > Strange, unless there is something in the pngs that causes a different viewer > to produce different output. > > I looked again (display from ancient imagemagic) and can't see any difference > - psnr/ssim agree. > > The pngs are not the same md5sum wise
OK - you’re definitely getting way over my head, but you’re right, it is strange. My Mac OS viewers definitely show the three pngs as different, although it is a bit subtle and you have to switch between them in place to see it. However, I opened them in Photoshop. Here, master.png and yuv-709.png look the same, and slightly brighter than yuv.png. I ran the histogram in Photoshop and it shows master and yuv-709 as identical, and with a bit higher luminosity than yuv as you expected. Somehow, the Mac OS viewer is seeing something that other viewers don’t! However I think you’ve found the solution with the colormatrix bt709 business. That should fix it. I’ll confirm and post again. Thanks! _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
