video encoding - h.265

[TheDutchOracle]

Hi guys, i have a video encoding question for a project that we are doing.
We have a prores 422 hq (2 minutes)

And we need to encode it to

H265
Yuv 420
10 bit LE
38 constant bit rate
UHD resolution (3840 x 2160)
(so no h.264, but the new h.265!)

Anybody any idea on how to do this?
Any idea would be welcome.

Thanks.

[tarkovsky]

This?:

http://www.cinemartin.com/cinec/hevc-h265/

t

[TheDutchOracle]

too bad they don't offer a trial or demo.
they say they cannot guarantee it with XEON processors and 4K footage.

[NNois]

there is nothing that beat ffmpeg... give it a try ;-)
https://trac.ffmpeg.org/wiki/Encode/H.265

[NNois]

here are some more info for the x265 codec
http://ffmpeg.org/ffmpeg-all.html#libx265
http://x265.readthedocs.org/en/default/cli.html#quality-rate-control-and-rate-distortion-options

I assume too that you're client specified a 38 CBR (Mb ?)
if so you need to use --vbv-maxrate etc in place of the normal quantizer "CRF"

Hope this helps

[tarkovsky]

too bad they don't offer a trial or demo.
they say they cannot guarantee it with XEON processors and 4K footage.

They can't guarantee what? Encoding? Sound a little strange.
Stupid with the disabled feature for trial...

[luceric]

couldn't you use Adobe Media Encoder, by renting CC for a month (75$?)

[TheDutchOracle]

it's not in media encoder yet.

We are attempting to recompile a version of ffmpeg et the moment.

[NNois]

I'm pretty sure zeranoe builds had h265 support https://ffmpeg.zeranoe.com

Are you sure ?

[NNois]

an I just checked the build coming from homebrew on a mac, then he has the h.265 support too ;-)

PS: on the mac you can install "homebrew" http://brew.sh/
then type "brew install ffmpeg"

[nDman]

HandBrake is a free, high quality and fast H.264 & H.265 encoder:

https://handbrake.fr/features.php

[FXDude]

Don't know much about H265, but I know handbrake is pretty good,
Otherwise, H265 seems to currently have a few trade-offs.

Much smaller files for the same quality, and much higher maximum quality (virtually losless) including bit depth are the pros.

And Considerably longer encode times (5-10x more) and somewhat more decode performance seem to be the current drawbacks.

Seems pretty neat overall though.

[NNois]

what's uber cool is that handbrake / libav / ffmpeg / gstreamer / mplayer / vlc are all somehow fork of each others and use barely the same same opensource libraries.

Just learn one (ffmpeg is the most common) and you will learn how a command line tool can save your ass many times ;-)