4k Playback

Streamworks Audio wrote on 7/31/2015, 12:19 PM

How many here are able to playback 4k at full/best preview mode at full frame rate (29.97)?

I have started working with 4K using my Sony FDR-AX100 - and when I put it on the time line the playback starts slow then picks up to a full frame rate. If I had a single clip that would be fine, but when I start to place multiple clips on the timeline the playback drops at the start of every clip.

I am not placing any affects on the clips nor track, and there is not transitions at all (butt edits only). Could it be my GPU is not up to the task (GTX 750Ti)? I keep hearing great things about the Radeon R9 290 and according to CompuBench's results the Video Composition test can produce double the frame rate as my GTX 750Ti can (I assume the Video Comp benchmark is HD video).

Cheers

Comments

wwjd wrote on 7/31/2015, 1:38 PM

There are many varieties of 4K video out there... some way bigger than others. I have GH4, who's files are small, and can not play back full inside Vegas. VLC plays them fine full screen 4k though.

I edit in PREVIEW LOW or HALF, and jump up to full size/best to check SHARP application.

Sometimes, if I let it playback a few times it almost hits full speed.

I have 32GB ram, i7 3770k, Titan 6GB GPU

musicvid10 wrote on 7/31/2015, 3:22 PM

Prerender was introduced way back in Vegas 2 iirc, for exactly the same problem.
Only then the persnicketty codec was MPEG-2.

astar wrote on 7/31/2015, 4:11 PM

Proxy Edit it is built into Vegas.

Smooth 4k playback, you will need your system to meet or exceed the Vegas recommended system requirements for 4k.

AMD demonstrated smooth playback of 4k on the W9100 sometime ago. The new Fuji XT might be able to match that with a PC under it that meets the CPU requiremetns.

OldSmoke wrote on 7/31/2015, 5:56 PM

astar got it right. Editing 4K at full/best with FX and third party plug ins requires a lot of horse power. I can edit 4K 100mbps files from AX100 at best/full with a couple of Sony plug ins but I still prefer to use proxies; I use Vegasaur to build the proxies.

Streamworks Audio wrote on 7/31/2015, 6:08 PM

I do have Vegasaur as well. Maybe I will look at working with proxies.

I wouldn't say my PC is a slouch. i7 4770k (Quad 3.5ghz/Haswell), 32GB RAM, 3 X SSD drives (one for OS, one for Projects and Source Material, and one more to render to). The only thing I think could be greatly improved is my GTX 750Ti..... I am looking upgrading to a GTX 970.

OldSmoke wrote on 7/31/2015, 6:33 PM

I am looking upgrading to a GTX 970

why would you do that? haven't you learned anything from this forum? Get a R9 290 or 290X!

Streamworks Audio wrote on 7/31/2015, 6:39 PM

Well that is because Nvidia has Shadow Play.... which is what I use for screen capture because it is far less of a headache that using a 3rd party software package.

If AMD had that it would be a no brainer ;-)

OldSmoke wrote on 7/31/2015, 8:39 PM

Just to be clear. The 970 will not any better in Vegas then your current card. So if you want better timeline performance in Vegas, then the 290X is a no brainer.

Streamworks Audio wrote on 7/31/2015, 8:48 PM

On CompuBench the 290X gets 121 fps for the video composition tests (OpenCL), the 290 gets 98 fps. The GTX 970 gets 108 fps. These are OpenCL tests, which Vegas uses for timeline playback, so the GTX 970 should be able to hold it's own.

I would go for the 290 (290X might be a bit out of my price range) if there was some sort of Shadow Play system in place (perhaps there is and I have just not read about it yet).

OldSmoke wrote on 7/31/2015, 8:55 PM

Good Luck!

ushere wrote on 7/31/2015, 8:59 PM

could someone clarify the last comment:

On CompuBench the 290X gets 121 fps for the video composition tests (OpenCL), the 290 gets 98 fps. The GTX 970 gets 108 fps. These are OpenCL tests, which Vegas uses for timeline playback, so the GTX 970 should be able to hold it's own.

if i'm simply looking for tl payback (forget about rendering), then the 970 is pretty much on a par with the 290x?

i mean there's not only the price difference, but the power requirements as well:

http://gpuboss.com/gpus/Radeon-R9-290X-vs-GeForce-GTX-970

Streamworks Audio wrote on 7/31/2015, 9:32 PM

I got these benchmark results from CompuBench's website.

I am too thinking, that for timeline playback the 970 should be able to match the 290. For rendering, well that is a different story. The codecs have different levels of support.

OldSmoke wrote on 7/31/2015, 9:46 PM

Read this thread.

astar wrote on 7/31/2015, 10:28 PM

Shadowplay on AMD is called VCE (video encoding engine)

http://developer.amd.com/community/blog/2014/02/19/introducing-video-coding-engine-vce/

I believe AMD ships an app, or something like Mirillis Action will take advantage of the VCE feature.

https://mirillis.com/en/products/action.html

Computbench is not a good ruler for Vegas, Luxmark v2 or 3 ranking of CPU+GPU shows a comparable Vegas ranking.

Anandtech's reviews of cards under Compute generally show Vegas Benchmarking of cards. NVidia's latest are normally below the 7970 in the Vegas ranking.

NickHope wrote on 8/1/2015, 3:22 AM

I get full frame rate preview of Panasonic GH4 UHD footage (3840x2160, 29.970 fps) at full/best in VP12 and VP13, even with color curves applied. GPU acceleration is OFF.

Intel i7-5960X
32GB RAM
Sapphire Radeon HD6970

I don't trust GPU acceleration any more, even though my card is supposed to be about as compatible with Vegas as it gets. And for my setup and workflow, it seems mostly unnecessary at the moment.

Mindmatter wrote on 8/1/2015, 6:04 AM

The new release of Davinci Resolve 12 supports multiple GPU ...! Now THAT is an idea!
I must say that although I cannot judge the preview speed of other NLEs, the constant issues with V+13's preview stuttering and framerate drops does seem flawed and anachronistic to me, given ntodfay's CPU speeds. The reason I got my new PC was patly to finally get a better preview, but seeing how V13 chokes on simple text animations is extremely disappointing, and certainly not encouraging to work on a 4k project.

I'm using the 290 with 32gig of RAM, but I'm starting to wonder if I should put my old GTX570 in the PC as well, just for the preview, if that makes sense and is technically possible.

Streamworks Audio wrote on 8/5/2015, 12:25 PM

Mirillis Action looks interesting, but does it work the way shadow play does where I only have to hit a key command to begin recording and never have to 'open' an application to make it work. That is a huge plus for Shadow Play.