Alternative if default not working

DeoGuy

Hi, I am using DeoVR on a Windows 10 gaming laptop using Oculus Quest via Oculus Link. I recently solved a problem playing H.265 HEVC videos by downloading the codecs and using the Direct Show option in DeoVR. Before that, DeoVR wasn't properly merging the left and right images. 'Alternative if default not working' was properly merging the images, but it just seemed to be using a lot of processing power and my computer couldn't keep up. What does that option do and when would I use it?

I found the following references to the 'alternative' but no further information about what it is:
https://forum.deovr.com/d/134-vr180-confusion
https://forum.deovr.com/d/37-why-is-everything-i-play-in-deovr-upside-down-now/5
https://forum.deovr.com/d/183-some-files-only-showing-single-eye (says Alternative and Direct Show use CPU -- correct?)

For reference, info on the codecs: https://forum.deovr.com/d/10-can-deo-handle-vids-greater-than-2160p

Thanks

Tony

DeoGuy

but it just seemed to be using a lot of processing power and my computer couldn't keep up. What does that option do and when would I use it?

When your GPU can't decode it. Means they are actually either x264/x265 or too large for your GPU decoder/unsupported by your GPU decoder.

ie h264 larger than 2160p can not be decoded on hardware.
h264 up to 2160p but encoded at L6.x is not an official format, thus is x264
x basically means software codec, processed by the CPU. As you've noticed first hand, this needs a pretty beefy CPU if it's HEVC.

This mpeg-4 level table gives a pretty good idea of how it works.
L5 = AVC/h264
L6 = HEVC/h265

Only formats that are in that table can be decoded by hardware. Other combinations are unofficial and need a software decoder.

PrinsReibi

I have the same problem. Some 180 video are recognized as mono.

Tony

PrinsReibi just put _LR_180 in the filename.