Hello everyone,
Having a brand new computer, I'm finally able to handle the long encoding time for h265! It's the occasion for me to store good quality 720p files encoded from blu-rays, for my own film archives.
But i have a problem with grain: i love it, and i encode a lot of old films with it, but it's really too present on the result files.
It's subtle, when i pause the video file it's really beautiful, but the grain is just too present and disturbing in display. Ironically, h264 compression tamed that.
I wonder if it's linked to the grain itself, or just in a way to interpret movement, to choose what must be detailed or not, etc. It seems also linked to the 720p resizing : in the original 1080p file, the grain is as present but smaller, and therefore not so disturbing in an h265 1080p export. I thought it was linked to resizing filters, but Lancloz3 and Bicbubic1 give the same kind of result concerning grain (it just slightly changes the sharpness of the edges of objects/charaters). (i tried that in Virtualdub2, i didn't find a way to choose the rezising filter in handbrake)
For now I have tried two things:
- Virtualdub2. I can only choose a "quality" factor (not a bitrate), "slower", and a profile - but whether i choose "grain" or "none", it doesn't seem to change a lot.
- Handbrake. I choose x265 with two passes (no turbo 1st pass) at 7000 Kb/s, and "slower". With "grain" profile, it shows a little less of it than on Virtualdub2, but still a lot (it still disturbs) ; with "none" profile, that's the opposite: the image losses a lot of its definition/precision in the process.
- Mediaencoder gave me awful results with h264, so i didn't tried it yet for h265, but maybe it's worth it?
I would like to know if there is a solution i can try, and which parameter i must change (because i know nothing in that matter - but i see there is an "advanced option" in handbrake in which we can put code). I'm reluctant to use ffmpeg directly, i really prefer a graphic interface... I know there is also StaxRip (even it seems complicated to me), maybe other freewares, or things i can change inside Virtualdub2 or Handbrake?
Thanks all!
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Last edited by TB54; 10th Oct 2020 at 05:14.
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H.265 Encoder doesn't insert grain by itself. Encode with CRF 25 and preset very fast for 720p. The source quality must be good, of course. Try with my clever Ffmpeg-GUI.
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If you want to remove grain:
- don't use the 'grain' option which is meant to preserve grain.
- use the noise reduction option of x265 (or a denoise, degrain filter offered by the application you use).users currently on my ignore list: deadrats, Stears555 -
H.265 Encoder doesn't insert grain by itself.
Encode with CRF 25 and preset very fast for 720p. The source quality must be good, of course. Try with my clever Ffmpeg-GUI.
use the noise reduction option of x265 (or a denoise, degrain filter offered by the application you use). -
I come back to you, if you have time, about that part: how do you setup the noise reduction option of x265? Is it a line code i can hade in the handbrake advanced window? Does it make sense ot use it with the "grain" profile, to tame it?
I tried the degrain filter of the app mixed with "grain" profile, and it's the best result I get (even if not perfect) for source with heavy film grain (30' movies), but for all the other ones, i am stuck between the two profiles ("none" giving a too smooth result with no texture, and "grain" giving too much grain, the 720p resizing making it more prevalent than in the source; the ideal would be something between those two profiles, but i don't know how to achieve that). -
I have 0 clue how Handbrake works and how to use it.
https://x265.readthedocs.io/en/latest/cli.html shows what command line option there are.
https://x265.readthedocs.io/en/latest/presets.html#film-grain shows what 'tune grain' does.
https://x265.readthedocs.io/en/latest/cli.html?highlight=noise%20reduction#cmdoption-nr-intra shows the noise reduction options I was referring to.
-> Best look at what 'tune grain' does and adjust your settings accordingly.
Cu Selurusers currently on my ignore list: deadrats, Stears555 -
Juste in case someone as the same problem as me:
I just read several feedbacks on a forum having the same feeling that "grain" profil adds/accentuates grain of the source if you use "slow" or a slower preset. It seemed weird to me (i thought the fast/slow thing only had an impact of the final filesize), but after some tries it happens to be true: the grain (using a "grain" profile) is more tamed with a medium setting.
Here is the difference (doesn't work on chrome, don't know why):
https://cdn.knightlab.com/libs/juxtapose/latest/embed/index.html?uid=f1c0de90-0e3d-11e...8-a15b6c7adf9a
It's even more obvious with a ultrafast setting:
https://cdn.knightlab.com/libs/juxtapose/latest/embed/index.html?uid=d85f0f16-0e3e-11e...8-a15b6c7adf9a
Still not perfect (the image is a little less sharp, and even if I don't really see it here i wonder if a faster tune doesn't have an impact on quality) so i will still try to see what i can have playing with the possibilities linked in the last message.Last edited by TB54; 14th Oct 2020 at 12:08.
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For a better quality with a limited filesize.
It was an habit I got when i found my first HD h264 files on the net, because a higher definition (1080p) asked much more bitrate for a good imag e quality, and on most of 1080p i found compression was really showing and ugly. I kept the habit: I watch those film on my computer anyway (well, maybe not forever, but when i tested some of them on my videoprojector, 720p was good enough for me): i prefer the better quality I obtain for the same filesize/bitrate with a smaller resolution. -
i thought the fast/slow thing only had an impact of the final filesize
-> https://x265.readthedocs.io/en/master/presets.htmlusers currently on my ignore list: deadrats, Stears555 -
Not in the newbie forum for nothing
Pity, it was an easy way to achieve the grain balance i needed.
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