Hello,
once again a new try with additional information.
I did try to compress h.262 videos to h.265 and would expect, if I
compress it to half of the size a comparison e.g. with vivictpp would
give a result, that nearby no difference will be seen.
(Refer also to
https://netflixtechblog.com/vmaf-the-journey-continues-44b51ee9ed12 . In
this context "bad" for me does mean a vmaf score <= 85.)
But its not. The following command I use (crf 20 only as example) :
Code:
#!/bin/sh
for f in *.ts; do ffmpeg -y -i "$f" -vcodec libx265 -crf 20 -preset slow -vf nlmeans="1.6:7:5:3:3"
-c:a copy "$(basename "$f" .ts).mkv";done
ffmpeg info of an example video :
Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002),
yuv420p(tv, progressive), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr,
90k tbn, start 0.124000
The videos all ways have a non square pixel format.
Are there any special vf parameter to handle this pixel format ?
Any ideas to improve it ?
(Beneath, its not a question for people who live in a lossless video
world, also to say h.265 is a lossy codec is wrong, crf 0 leads to a
lossless result)
Thanks
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