H.264 AMD VCE encoder info?

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bctf1
Posts: 5
Joined: Sun Dec 22, 2019 6:13 pm

H.264 AMD VCE encoder info?

Post by bctf1 »

Description of problem or question:
The only documentation I can find for the H.264 AMD VCE encoder is https://handbrake.fr/docs/en/latest/tec ... o-vce.html in Handbrake documentation. I am encoding large .mkv files at QP22 in Windows 10 v1909 using Handbrake 1.3.1.

I have been experimenting with this codec on a Ryzen 5 2600 computer with a Radeon RX 570 GPU. It seems to offer acceptable video quality while reducing encoding time compared to my usual H.264 codec by over 70% and the codec is averaging 70 - 80 fps in the process. The added benefit of VCE is that my cpu is not running at 75C - 78C along with my 4 case fans and cpu fan running at 100% rpm for the total duration of the encoding process.

The encoder preset 3 options of speed, baseline and quality seem to produce very little difference in the encoded file. I can't find any information about the encoder profile options of baseline, main and high pictured below. Nor can I find any info on the encoder level options of auto and 1.0 - 5.2 pictured below. Any information about these options would be very much appreciated.

[img]https://drive.google.com/open?id=1K68Z9 ... l08Krx/img]

HandBrake Activity Log ***required*** (see [url=https://drive.google.com/open?id=186hjc ... D55upDD84b[/url])

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s55
HandBrake Team
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Joined: Sun Dec 24, 2006 1:05 pm

Re: H.264 AMD VCE encoder info?

Post by s55 »

H.264 Levels: https://en.wikipedia.org/wiki/Advanced_ ... ing#Levels

We don't have any documentation on the encoder presets, so it's essentially a blackbox. That said, the hardware is very limited so I doubt they really do an awful lot.

P.s if your hitting 78C on a 2600, you might want to take a look at the CPU cooler. That's not normal.

bctf1
Posts: 5
Joined: Sun Dec 22, 2019 6:13 pm

Re: H.264 AMD VCE encoder info?

Post by bctf1 »

Here is the image referenced in the original post:
https://drive.google.com/file/d/1K68Z9L ... sp=sharing

bctf1
Posts: 5
Joined: Sun Dec 22, 2019 6:13 pm

Re: H.264 AMD VCE encoder info?

Post by bctf1 »

Thank you s55 for the link for H.264 Levels. I am using the supplied Wraith Stealth cooler on the 2600 along with 4 case fans. My research indicates that these temperatures are not uncommon for this cpu at full load.

Before experimenting with AMD VCE, my usual preset was H.264 MKV QP22, framerate - same as source (constant), 2-pass encoding, encoder preset - slower, encoder tune - Film, encoder profile - High, encoder level - 4.1 and advanced options - ref=5:bframes=5. This preset always runs the cpu at 100% for the duration of the encoding process but produces very good video quality.

https://drive.google.com/open?id=1cQhXY ... ZRBzRJWISd

Any idea where I might get more info on the VCE encoder profile options of baseline, main and high pictured below?

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s55
HandBrake Team
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Joined: Sun Dec 24, 2006 1:05 pm

Re: H.264 AMD VCE encoder info?

Post by s55 »

baseline main and high are just standard H.264 profiles also listed in the link above.

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