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What is the difference between -crf and -cq parameters of ffmpeg? I am trying to compress 1080p h264 videos into 1080p h265 videos with high quality and low size. I have noticed that in some guides they use -crf while in others they use -cq + -qmin + -qmax.

I have tried researching the difference and all I could come with is that with -crf the size is a bit lower because it reduces data for scenes with fast actions that the person watching would not notice while with -cq that is not the case. Is that it? Are there any more differences? If I have used a number with -crf would the result be similar if I were to use the same number with -cq?

Thank you.

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