Question VLC + Win11 + 1080p H.265 12-bit = single-digit FPS

[mikeymikec]

Hardware:

Ryzen 7800XT
32GB DDR5
RX 6700 XT
ASUS B650 TUF GAMING (latest BIOS)

I'm getting about 2FPS with Blu-ray films that I've ripped in software, H.265 12-bit format. There's no excessive CPU/GPU usage, I've tried flicking between hardware acceleration modes in VLC, no difference. Other BRs I've ripped (H.265 not 12-bit) are fine, DVDs I've ripped are fine. I do the ripping with Handbrake in Windows, and if I boot into Linux and watch them with VLC, it works fine.

I've also tried playing with Windows's own option for using which GPU with which app (as my system shows the onboard GPU as well as the 6700 XT), no difference.

It sounds to me like a bug in the win64 release of VLC (I'm using the latest version), but I wondered if anyone here has had similar experiences and maybe fixed them.

 

[CameronHowdy]

Hey, to address the low FPS issue with H.265 12-bit Blu-ray playback on your Ryzen system, start by updating VLC and GPU drivers. Install a comprehensive codec pack, configure VLC video output settings, and ensure GPU acceleration is enabled. Also check BIOS settings, monitor resource usage, and consider third-party Blu-ray software. If the problem still persists, reach out to AMD support for tailored assistance, and remember always back up before making significant changes.

 

[Tech Junky]

Sounds like a VLC+windows issue. Downgrade the version and try again.

I do all my conversions in Linux with qsv and let handbrake decide what to use by default I have it set for the highest possible profile and it just uses whatever the original format is for the output. I think the highest option though is 4k 10 bit.

 

[mikeymikec]

Sounds like a VLC+windows issue. Downgrade the version and try again.

I do all my conversions in Linux with qsv and let handbrake decide what to use by default I have it set for the highest possible profile and it just uses whatever the original format is for the output. I think the highest option though is 4k 10 bit.

I'm just wondering which version to try, as I think 3.0 brought in support for 12-bit H.265. I suppose I can start there and hop a few revisions up at a time.

 

[VirtualLarry]

Do you need the MS H.265 codec pack from MS Store for $0.99? The codecs are not included in windows by default anymore.

 

[mikeymikec]

Do you need the MS H.265 codec pack from MS Store for $0.99? The codecs are not included in windows by default anymore.

VLC does not use Windows video codecs.

 

[mikeymikec]

I did some more testing this evening, installing lots of different versions of VLC and it appears that x86 versions are all fine, x64 versions are fine until 3.0.7.

 

[igor_kavinski]

I did some more testing this evening, installing lots of different versions of VLC and it appears that x86 versions are all fine, x64 versions are fine until 3.0.7.

Post a bug report.

 

[mikeymikec]

Post a bug report.

I've posted it on the official forum so far, see where that goes first methinks.