Videos are choppy when using dGPU???

[negativzero]

I've been shooting 4k/60 videos with an iPhone X and I've noticed the videos come out choppy when the dGPU is in use. However the videos when played when I force the iGPU are nice and smooth. Shouldn't the dGPU be better at decoding videos than the iGPU or am I missing something here?

Camera: iPhone X
Computer: 2017 MBP 15" TB

 

[h9826790]

I've been shooting 4k/60 videos with an iPhone X and I've noticed the videos come out choppy when the dGPU is in use. However the videos when played when I force the iGPU are nice and smooth. Shouldn't the dGPU be better at decoding videos than the iGPU or am I missing something here?

Camera: iPhone X
Computer: 2017 MBP 15" TB

Because Apple didn't activate any dGPU's H265 hardware decode ability

 

[flowrider]

Sounds like a Driver issue.

Lou

 

[kohlson]

If you're running 10.13 and CUDA is installed, that could be an issue.

[edit] Ooops - not this. CUDA is only for Nvidia GPU, which the latest MBPs do not have. Thanks to h9826790 (below) for keeping me on my toes!

[edit#2] Sheesh, I've really messed this up. Not AMD - corrected to Nvidia, as both flowrider and h9826790 have kindly pointed out. In my defense, I had knee surgery yesterday. A lesson to stay off the keyboard in times like this!

 

[h9826790]

If you're running 10.13 and CUDA is installed, that could be an issue.

Install CUDA on a 2017 MBP?

 

[flowrider]

[edit] Ooops - not this. CUDA is only for AMD GPU, which the latest MBPs do not have.

Certainly NOT TRUE! Cuda utilizes the Nvidia architecture.

The OPs GPUs are Intel HD Graphics 630 and AMD Radeon Pro 555 or 560. Cuda, whether installed to not should have no impact.

Lou

 

[negativzero]

Because Apple didn't activate any dGPU's H265 hardware decode ability

So disabling H265 is deliberate on Apple's part?
Anyway, I've been checking, through my catalog, only the videos shot in 4k from my iPhone X are having this issue, other 4k videos I have don't have this issue. Weird though.

 

[h9826790]

So disabling H265 is deliberate on Apple's part?
Anyway, I've been checking, through my catalog, only the videos shot in 4k from my iPhone X are having this issue, other 4k videos I have don't have this issue. Weird though.

You mean other 4K H265 videos, or other 4k videos? The codec make the big difference here.

If other 4K H265 videos are OK, that may because the bitrate / parameters are within the CPU software decode ability, but not because other videos can utilise the dGPU hardware decode.