At a value of 15, it’s a good compromise, in my opinion. All I know is a value of 0 means lossless output but very large file, and 20 means much smaller file but compression artifacts will be visible to some extent. “I do hope Topaz will clarify, but I think compression factor 20 and CRF 20 are one and the same, as Topaz uses ffmpeg for video output. I hope someone from Topaz team can explain it, and they can rework the interface for future releases so it makes sense and it is not only consistent within the Topaz interface and applications, but also consistent in regards to standards used by most applications already. Thank you for your link, but I remain with more questions than answers, sadly. Its like four different developers worked on it, and no one talk to each other. There is not even “?” little tool-tip indicator for it, even if there is one for “keep audio” option. ![]() Is it 20x factor or 20% of something? And of what? I’m sad to say, the user interface design in that instance is amateur. ![]() Everything from bit rate, bit depth, color space etc, but not compression factor, whatever that means. ![]() There is a whole slue of terminology mentioned in most programs. There is no reference I can find or explanation. Thanks for the reply, but Constant Rate Factor (CRF) mentioned in the FFMPEG guide, is not the same as compression factor mentioned in the Topaz interface.
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