Hi. For a long time, I have been using x264, now I am trying to see if x265 is mature enough for my tastes and needs.
I always a crf setting and presets. With x264, if I change the preset for a slower one while keeping the crf, I get a smaller size, with the quality stays roughly the same. That is good, that is exactly what I expect and want. With x265, on the other hand, the tests I just ran show that a slower preset gives a larger file and better quality. That means the crf is not really constant across different presets. Is there something I am missing? For reference, the command line I am using for my tests is: time ffmpeg -y -nostdin -i input.mkv -an -vf scale=1280:720 \ -c:v libx265 -preset medium -crf 24 -f rawvideo x265_24_medium.bin Regards, -- Nicolas George
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