Ffmpeg crf vs qp 1080p#

I have spent hours on hours to find good settings but after this incident I am completely baffled and I think that I am doing something very wrong and wasting so much of the system resources for no reason.

What can I do to find the optimal settings. Can I actually use lower settings and still get the same video quality? So I came here to ask to settle this problem once and for all.Īre the settings I use overkill? I am basically using Constant Rate Factor of 20, which I don't think is very high. This made me think that, if I can achieve the same video quality with only 5mbps bitrate, why is OBS recording it with 23mpbs bitrate. The thing is, no matter how close I look, I can not notice a difference in video quality, image quality is the same. mp4 file, however, has only 5778 kbps bitrate and takes 333mb of space. mkv file has a bitrate of 23066 kbps and takes 1.3 gb of disk space.

I will try to explain as clearly as possible.įirst of all, the command I used to convert the video was this:įfmpeg -i inputfile -map 0 -c:a copy -c:s copy -c:v libx264 output.mp4 mp4 and something really surprising happened. Because HitFilm 4 Express does not support h265 file support, I used ffmpeg to convert this 8 minute long video, from h265. However, I have noticed something really weird today.

Ffmpeg crf vs qp 1080p#

I have good video quality, bearable video size (8 minutes video has 1.3gb of file size) in 1080p 30fps.

To keep things simple, here are the settings I use in OBS Studio:īasically, the only thing I changed was the QP values, both set to 20. I have a YouTube channel and I have been recording since two years but could never really grasp the system behind choosing the right settings and my videos tend to look really muddy, no matter what bitrate or CRF value I choose. 2x1TB Western Digital 7200rpm Caviar Blue HDD