Could you test again with -qmin 1 -qscale 1 ?
I tested again with those settings, and the result is better, but still not as good as a conversion by OS X Preview. I’m only observing visually, using Preview.app. The blockiness is especially noticeable on the black shirt chest area. Here are example files. The one created by FFmpeg with qmin 1 is 609KB. The one created by Preview is 1.9MB, and is nearly identical to the TIFF. Original TIFF: https://drive.google.com/file/d/0B52QuT8oHvtZZkhSUkswUDhJSlU/view?usp=sharing Preview: https://drive.google.com/file/d/0B52QuT8oHvtZYU5MX0dJWjcxdkU/view?usp=sharing FFmpeg: https://drive.google.com/file/d/0B52QuT8oHvtZRW9SZjhsU2pYakE/view?usp=sharing _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
