HEVC 10 Bit Canon R5 & nVidia

j.razz wrote on 7/18/2025, 6:13 PM

Been reading the threads relating to HEVC, 10 bit, and specifically how it relates to Canon's implementation of it in the r5 model. It doesn't seem too promising for Vegas Pro 22 and 5080 cards. Here is a link to one of the files: https://www.dropbox.com/scl/fi/awcoamf713bj3xkg4cekk/6C9A4884.MP4?rlkey=nxhtg3jud0ttqfjwstqjsyhja&st=2shvkfgi&dl=0

On my Razer (specs in profile), I can get playback on the timeline of around 19fps in Preview Auto. On my Skytech (specs also in profile), I can't get the 5080 to show video in the preview window and the timeline just shows white on the event instead of the thumbnail. I can switch over, under File I/0 to Ryzen as the hardware decoder and it will load the event thumbnail and playback in the preview window- but the fps are just a tad lower than what I can get on the Razer with the 3080ti card.

I did spend some time testing on the Skytech to see if switching on the HEVC experimental decoding would make any difference, and trying the decoder setting in the video tab of preferences. The only thing that works is choosing the Ryzen option under File I/0.

Any chance there's an update/patch or preference I need to change under Preferences | Internal?

Any chance version 23 will play nice with Canon r5 and Canon r3 files with the 5000 nVidia series? I'd hate to waste all that power when it's just sitting there waiting to be optimally used :)

Lastly, @VEGASDerek if you are looking for another tester for v23 since you are actively in beta now, I'd be happy to lend some time and input.

Comments

Alan-Smithee wrote on 7/18/2025, 7:54 PM

Any chance version 23 will play nice with Canon r5 and Canon r3 files with the 5000 nVidia series? I'd hate to waste all that power when it's just sitting there waiting to be optimally used :)

You would sure hope so and it will unleash the following:

andyrpsmith wrote on 7/19/2025, 3:49 AM

Your 3080Ti cannot decode H265 10bit 422, only the new 50 series can.

https://developer.nvidia.com/video-encode-and-decode-gpu-support-matrix-new

Howard-Vigorita wrote on 7/19/2025, 12:29 PM

Although I've been a Canon user for decades, I passed on both the xf705 and r5 for video because they cannot save hevc 4:2:0. Only 4:2:2. And went with the xf605 and c70 which do not suffer that omission. Note that all single sensor cameras lack the elements to actually capture 4:2:2. The missing elements are synthesized in camera before saving. Which results in larger encodes that require faster media and bigger batteries. And that Vegas & gpus like Nvidia accomplish the same thing quicker and better in computer.

j.razz wrote on 7/21/2025, 1:22 PM

Andy, it quite possibly is using the intel QSV, but that's not what's selected under I/O. (I may have changed some settings under internal years ago- so that may have some bearing on how the nVidia can be selected under I/O and it's using the intel cpu instead. But that's just speculation.

Howard, I shoot both video and photo- heavier on the photo side, so the r3 and r5 were what I went with over pure video devices. Thanks for letting me (and others) know about the c70 and xf605 though!

RogerS wrote on 7/21/2025, 8:11 PM

VEGAS seems to automatically drop back to QSV if that decoding is available (I see that on my systems). You can right-click and look at the properties of any media to see how VEGAS decodes it. Hold down shift for even more info.