Resolve crashing with H.264

Hi,
I am trying to evaluate Resolve but I am not clear if what I am trying to do is supported

I have tried both 14.3 and the 15.x beta
When I play or scrub through a 4k h.264 video clip, it works for a bit then the application crashes.
I am on Windows 10 with 16 GB of Ram. The CPU is an i7-920 which is old.
I would expect the app to run slowly, but I am puzzled by the crash

I tried a clip using Dnxhd encoding and that works fine.

So on that platform
- is importing 4k h.264 (mp4 or mov) files supported?
- is the crash expected? Assuming the file is NOT supported

Thanks in advance for the help

Hi.

In Resolve the CPU is used to run the app, disk I/O and compression and decompression of codecs.
Resolve does all its image processing in the GPU on the graphics card. The minimum version of OpenCL is 1.2

Here is a link to the DaVinci Resolve 15 Configuration Guide:

http://documents.blackmagicdesign.com/D ... _Guide.pdf

Regards Carsten.

It's not correct. H264 is decoded by GPU (if possible) in Resolves 15 (at least for 4:2:0 8bit).

You can specifically disable h264 GPU decoding in Resolve main preferences (general tab).

[Peter Chamberlain]

It's not correct. H264 is decoded by GPU (if possible) in Resolves 15 (at least for 4:2:0 8bit).

You can specifically disable h264 GPU decoding in Resolve main preferences (general tab).

To be fair its only in some newer GPUs and it's only 8bit 4.2.0.
So the statement is accurate for some situations.

Yes, but by default it's enabled and you more like to have issue with GPU decoding then with CPU (specially on Windows where combination of GPUs+drivers is huge).

Simple test- disable GPU h264 decoding and check if files import. At least 1 variable will be ruled out.

Thanks for all the replies.
I'll move back to Resolve 15 and try disabling the GPU

I've uninstalled 14.3 and now have 15 beta 3

I am having difficulty seeing exactly where I can turn off the GPU. I see where I can change it from AUTO to OpenCL, which I tried. Andrew, can you help me out with a detailed description of where to find the setting to turn it off?

I've also tried creating an optimized version of the clip (proxy). This results in nice playback and scrubbing. However, after inserting a title effect before clip, Resolve crashed after playing back the title but before playing any of the video clip, which as I said above had been working ok as a proxy.

So I think my best bet is to turn off the GPU, if someone can help me with that.

Thanks

It seems to solve my similar issue by switching from Auto to Open CL (by AMD GPU does not support CUDA), the video playback without the glitch in the audio. Let see how it goes with the crashing (finger crossed)