macOS transcoder for clips

Good afternoon (o;

I have some clips here shot with the Summon+ at 2.7k@30fps...

Quicktime movie players plays just fine this iCatch AVCC, 2704x1524 file.

Importing this clip into DaVinci Resolve and playing from the stutters heavily, though CPU usage is around 15%...

Is there a good and probably free tool to convert the clips into a better performing format?
AVIDemux can encode to h264 in a mp4 container, but those are not playable at all...


thanks in advance
richard

Hmm...forgot to turn on menu point "playback -> performance mode"...though dunno what this has an effect (o;

My first recommendation would be to use Optimized Media in Resolve.

Optimized media is on by default....though see no effect....

This the first thing I checked after googling

Might there be a performance issue when clips are higher in resolution than the project size?
Though that would reflect in a higher CPU load...

Which format is your optimized media set to?

If I recall correctly it is DNxHD SQ or something (o;

I changed it from a post somewhere but did not show any effects....but with the playback->performance mode it is fine...

Might be that Studio version is faster? As I see low CPU load in any case I assume the GT1030 does not a great job

On the Mac the Studio version is not faster (except with an eGPU in concert with an internal one).

But a 1030 is not really fast.

Well I intend to get me an i7 8th generation machine with GTX1080 for xmas....meanwhile I study the great features of DR

BTW: As you are a more experienced DRS and FS user...

Is it possible to have a graphic line on top of video and just modify the x1/y1 position of the line with keyframes?

Saw this on a ZDF documentary where the caption text is stable but only the pointer line endpoint moves with the object...

Optimized media is on by default

That setting governs it's use. You create it manually.

Hmmm...in the settings it says it will be created in the background...so where do I trigger it?

From the Media page, select the clips, right click...

Well...just received my dongle today and tested it on Ubuntu...works more fluent...though it crashes soon as the GTX1050 has only 2GB VRAM (o;

Gonna test tomorrow at home on my Debian machine with a GTX1060 with 6GB.

Maybe on xmas I will build a new Mac with higher specs for better performance when the GTX2080 are supported (o;

Well the GTX1060 with 6GB doesn't do any more than the GT1030 with 2GB...

With same low camera tracking settings both cards choke and resolve has to be killed manually..

I assume resolve would even fill a GTX1080 8/11GB pretty quickly and choke as well...
Why does resolve use so much more VRAM than HitFilm Pro?

Really weird, I can work in 4K with 8 GB VRAM without major trouble. Could you upload a short test clip?

Here's a clip which is shot in 2k7@30fps on a Summon+...

http://www.wedernoch.ch/resolve/testclip.mov

Do you als do camera tracking and particle effects?

Glad I didn't buy a more expensive card with 8/11GB just to find out it won't work as well (o;

thanks for testing
richard

It plays without any problem here.

Well playing is not the problem...but adding a camera tracker wont't work with 6GB (o;

So I hardly doubt if I should invest in a GPU with 8GB or 11GB as it would eat it up as well quickly...

You wrote: "Importing this clip into DaVinci Resolve and playing from the stutters heavily", which doesn't happen here. BTW, it's codec is JPEG, which is by far not as heavy as H.264.

Do you mean the planar tracker in Resolve or the camera tracker in Fusion? I can give them a try. But what do you expect from it? It won't track with so many objects passing close in the foreground and probably those massive exposure changes from automatic won't be helpful either.

P.S. Both tracking in Resolve and in Fusion run without a problem here. Stabilization in Resolve is remarkably fast, but tracking and solving 3D for such a long clip is very slow in Fusion. BTW, the GPU doesn't matter at all for the latter. As I expected, the 3D track is not usable with an error of 141 pixels at default settings. Better settings may take hours without much better results for such a shot in my experience.

Well I switched to resolve studio on linux now with a gtx1060 6GB. Much better performance...
But still eats up those 6GB and chokes many times or crashes without messages when selecting the export tab in the camera tracker...

The tracking I tested with 30 to 60 frames clips only....

Why do you say that GPU doesn't matter for tracking?
Does it use OpenCV on CPU for that?

I just had my GPU und CPU usage monitored and my mid-level GPU was not busy at all. Plus, I never ran into any VRAM limit even with very long clips to track.

Are we really talking about the same thing? The "Camera Tracker (CTra)" in Fusion?

P.S. I just did another test:
I checked GPU memory usage and surprisingly, even if Fusion is set to use the CPU, the memory of my GPU is getting used close to 100%. It doesn't crash, though, as mentioned.
This doesn't seem to depend on resolution, I see the same with HD or UHD.

I also tried the same in Fusion standalone, and to my surprise the usage of VRAM was much lower, around 20-25%. It seems that Resolve is somehow using the VRAM to operate Fusion in it's page. So, for now I'd use the standalone for such tasks.