x265 Encoder Script

[mgt1234]

Hello guys ,
we have video in x264 and we want to convert it to x265 HEVC using x265-Encoder https://www.videohelp.com/software/x265-Encoder .
What are the commands of this script ?

[Baldrick]

SO you want to reconvert a x265 to x265??? ( x265 makes hevc/h265 video)

You could just use a GUI. Handbrake and VidCoder can convert with the x265 in a mp4 or mkv.

Or use a gui for x265.exe like Hybrid.

[mgt1234]

SO you want to reconvert a x265 to x265??? ( x265 makes hevc/h265 video)

You could just use a GUI. Handbrake and VidCoder can convert with the x265 in a mp4 or mkv.

Or use a gui for x265.exe like Hybrid.

Sorry!
I Want Convert x264 To x265

[Baldrick]

Then use the software I suggested. THey are much easier than using the command line x265 encoder.

[mgt1234]

Then use the software I suggested. THey are much easier than using the command line x265 encoder.

Tnx But,
Encoding is very slow with this applications!

[Baldrick]

x265 HD video encoding is very slow.

Get a faster computer or try a faster preset, change to constant quality and change the x265 preset to Superfast.

[mgt1234]

x265 HD video encoding is very slow.

Get a faster computer or try a faster preset, change to constant quality and change the x265 preset to Superfast.

if Change preset to superfast or very fast or faster, output file is Very low quality!
I Want Use Medium preset or fast, but encoding A one-hour Movie , It takes half an hour!
I Want Help me to encoding faster than!
Computer Information :
Ram : 32Gb
CPU : Intel (R) Core (TM) i7-3930k . 3.20GHz
Is this appropriate?

[Baldrick]

Why do you want to convert at all? Shrink it?

[mgt1234]

Why do you want to convert at all? Shrink it?

Yes!
Low Size & High Quality!

[mgt1234]

Why This Softwares are not usage full power cpu?

[mgt1234]

What do you think about this program?
https://x265.github.io
Sorry for Many questions

[Baldrick]

They all use same x265 engine so you should get same speed. But if you want SMALL size and GOOD quality it will take that much time.

[dracuella]

Baldrick, you're a very patient man ^_^

[charlas]

I've recently gone through the trouble of Transcoding my whole video catalog over to HEVC. I use https://github.com/FallingSnow/h265ize with the following settings.

h265ize -v -m medium -q 20 -x --no-sao --aq-mode 3 --delete --stats

-v - Verbose Output
-m medium - Medium encode speed (smaller higher quality, anything slower I find is not worth the time/quality dif)
-q 20 - the CRF used, 20 is similar to 18 or so in x264 but hey. This is for 1080p content (90% of my TV) I tend to use 22 for my 4K movies
-x - Use x265 central defined commands --no-sao turns off Sample Adaptive Offset (improves speed of encode)
--aq-mode 3 - use Adaptive Quantisation with auto variance, helps 8bit encodes, especially in dark areas, stops most of the banding that can happen (at expense of encode time though)
--delete - replace encoding file with encoded file (test before using this one)
--stats - Write stats out to a csv file in the root of the path you ran from.

Encode speeds are around 30fps (for most 1080p stuff) on my rig. Dual Xeon E5 2687W v2, but I force the FFMPEG process to not use the first side of one of the processors (It's my Plex server, so have to make sure there's overhead for transcode if needed on playback etc)

Yes it took a while to convert most of it over, and now I have a scheduled task that runs twice a day to encode the stuff from that day over to x265.

The space savings have been enormous. My initial SAN was at 20Tb use, now it's around 12 but obviously has been added too with 6 months more content.

I've started to transcode all my Movies over too, however, that's an ongoing process, as I have to ID quality levels (Radarr fortunately labels then nicely) and use one of three transcode settings

-m slower -q 18 -x --no-sao --aq-mode 3 : for 720p transcodes
-m medium -q 20 -x --no-sao --aq-mode 3 : for 1080p
-m medium -q 22 -x --no-sao : for 2160p

Hope that helps some people. Shout if anyone needs a hand setting it all up. And before you encode everything to x265, think about playback, if the client doesn't support x265 native, then the transcade can be expensive in terms of CPU and Quality.

[Bernix]

Hi,
sorry but isn't -q 20 option Constant QP rate control that should be bit different from -crf 20?
I am always wrong, so if I am wrong again, let me know

Bernix

[poisondeathray]

Hi,
sorry but isn't -q 20 option Constant QP rate control that should be bit different from -crf 20?
I am always wrong, so if I am wrong again, let me know

Bernix

Yes it's a different method of rate control

By definition constant QP means "constant" quantizer - so "adaptive" quantization is also disabled. So --aq-mode 3 doesn't work in his command line

Generally it's a less efficient method than crf for a given level of visual "quality".

[charlas]

Hi,
sorry but isn't -q 20 option Constant QP rate control that should be bit different from -crf 20?
I am always wrong, so if I am wrong again, let me know

Bernix

Yeah it is, just it's easier to explain in a simplistic way is all (QP vs CRF is a whole thing in itself), but in essence, increasing the CRF will increase the QP in line and decreasing will decrease it. The -q ?? is just an 'easy' way of viewing it.

as a note -q 4 is essentially lossless (when you use the -lossless setting in X265 advanced parameters it sets that value itself)

Just thought the post may help some people in moving over to x265/HEVC a little easier.

EDIT : As mentioned above the aq-mode wont work, thanks for letting me know, I hadn't realised, may have to edit my scripts now to take that into account.

[tkg]

Charlas,

Are you using the h265ize script on windows? If so, how did you install the vobsub2srt dependency? I am having issues trying to get that installed on windows even though the creator claims "everything" (i assume) is compatible with windows, mac and linux.

Thanks!

[charlas]

Charlas,

Are you using the h265ize script on windows? If so, how did you install the vobsub2srt dependency? I am having issues trying to get that installed on windows even though the creator claims "everything" (i assume) is compatible with windows, mac and linux.

Thanks!

I've done nothing special, works fine? I did have a bunch of the dev tools required already installed though, so perhaps I've been through the issue before on something else.