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30min video 6 hour rendering time!

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Ace Singh
30min video 6 hour rendering time!
on Sep 27, 2016 at 12:32:52 am

Hi,

So I'm recording some gameplay, I've added my webcam footage to it and some audio from my microphone but my rendering time is almost 6 hours! I'm sure that with my PC specs it should be a lot quicker?! I only want to be able to upload the best quality to YouTube so maybe what I'm doing is overkill?

My main gameplay is recorded from Nvidia Shadowplay at the best quality, 60fps and 1920x1080 HD. My Logitech camera is also 1920x1080HD.

Any help is truly appreciated.


My PC Specs -

Windows 10
i7-4790K CPU
GTX 980
16GB RAM

Vegas Pro 12

My Render Settings -

<a href="https://images.creativecow.net/314240/creativecow1.jpg"><img src="https://i1.creativecow.net/u/314240/creativecow1.jpg" border="0" /></a>


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Steve Rhoden
Re: 30min video 6 hour rendering time!
on Sep 27, 2016 at 3:11:31 am

Rendering recorded game play comes with a variety of issues sometimes, so its hard to be specific as to
what is causing your specific issue.
Speaking of specific, what's your render settings for this?, (which also could be due to your long render time).

Steve Rhoden (Cow Leader)
Film Maker & VFX Artist.
Owner of Filmex Creative Media.
Samples of my Work and Company can be seen here:
http://www.facebook.com/FilmexCreativeMedia


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Ace Singh
Re: 30min video 6 hour rendering time!
on Sep 27, 2016 at 9:11:32 am



Not sure why the image isn't showing up but I'll write it here just in case

I used the MainConcept template Internet HD 1080P then customized it

Format - Audio: 192 Kbps, 48,000 Hz, 16 Bit, Stereo, AAC
Video: 59.940 fps, 1920x1080 Progressive, YUV, 12 Mbps
Pixel Aspect Ratio: 1.000

Frame Size - HD 1080
Profile - High
Frame Rate - 59.94 (Allow Source to adjust frame rate ticked)
Field order - None (progressive scan)
Pixel Aspect Ratio - 1
Number of reference frames - 2
Variable bit rate - two pass - Max 24,000,000 - Avg - 12,000,000
Number of slices - 4
Encode mode - Render using CPU Only

Audio -
Sample Rate - 48,000
Bit rate - 192,000


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Peter Holt
Re: 30min video 6 hour rendering time!
on Sep 27, 2016 at 2:48:46 pm

I routinely see 1/10 of real time rendering speeds... The best I ever managed with any version (MSP11, 12, Pro 13) was 1/3 of real time and that was going 1080P to 720P 50FPS and no FX, just a render. That is with no GPU acceleration (never worked in MSP and crashes Pro 13) so just the CPU which is a 3GHz 6-core i7-970 (win7-64, GTX750). Currently I am running an intermediate render of a 7hr job which will run for 80-100hrs. This stuff just is very slow. I know a guy with Final Cut Pro (Mac OS) who says he renders at 1x real time, but then Apple tightly control the video hardware and he has a properly working coprocessor.


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John Norton
Re: 30min video 6 hour rendering time!
on Sep 27, 2016 at 8:09:12 pm

Goes without saying, I suppose, but removing 2 pass would make it quicker!


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Ace Singh
Re: 30min video 6 hour rendering time!
on Sep 27, 2016 at 11:02:20 pm

Would that make a huge difference quality wise? Or is this one of those things I'm better of testing...probably the latter lol


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László Kovács
Re: 30min video 6 hour rendering time!
on Sep 28, 2016 at 5:01:11 am

I always do single pass render with a slightly higher bitrate, but lower framerate (25p)
Never had quality issues.
But, if I would have to change something that may affect quality towards wore, I'd check if the settings still works good.
I mean render 1 or 2 minutes only, and that shows the quality.
That you can do as well, render just 1 minute, see how it looks. And if it's OK, render the whole thing - overnight maybe.

Best regards

László Kovács


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Peter Holt
Re: 30min video 6 hour rendering time!
on Sep 28, 2016 at 8:07:17 am

I have done both 1-pass and 2-pass on the same material and same render settings, and I recall that the 2-pass generates maybe 10% smaller files, but better quality.

I am not 100% sure if I changed the bitrate also; logically the file size should be purely according to bitrate, and *definitely* the output frame size (e.g. 1920x1080) does not affect the file size for a given bitrate.

Most of the time the difference is not visible but in some videos I could tell the difference in some details e.g. a moving camera shooting a piece of tarmac which has a huge amount of detail and totally maxes out the bitrate even at 100mbits/sec.

I now use 1-pass for intermediate renders and 2-pass for final ones, because anything helps to get inside the 5GB file size limit on Vimeo ;)


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John Norton
Re: 30min video 6 hour rendering time!
on Sep 28, 2016 at 11:36:12 am

"I always do single pass render with a slightly higher bitrate"

This is what I do also. I know they are not the same, FFMPEG and MC, although you never know whats under the hood completely, with ffmpeg, 2 pass is used more to target a perticular output file size, than quality (CRF).

As mentioned here already, pick a small section of video, ideally a challenging piece in low light, then increase the bitrate until it improves to what is acceptable, and also where it improves no more, all at 1 pass. If output file size is critical then go 2 pass and do the same testing. That way you can settle on a template thats good enough without having to keep changing, especially if you add a bit extra, i.e. if you find that say, 24/18 is just right then set the template to say 24/20 to cover anything. Assuming size is not critical.


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Angelo Mike
Re: 30min video 6 hour rendering time!
on Sep 28, 2016 at 3:36:33 pm

In my opinion, your bit rate is definitely overkill for YouTube. YouTube compresses everything to what, 3 mpbs? I usually render video for YouTube from my Canon Powershot G7X (or formerly my Canon Vixia HF S21) at 4 mpbs. I used to do it out of ignorance at 10 mpbs and noticed no difference.

Experiment with bringing your bit rate down in a few second clips to see what's lower bit rate gives you acceptable quality. The only reason I'm not saying for sure a 4 mpbs bit rate will work for you is because I haven't personally tested the same kind of video to see the difference, but I'd make a firm bet that the quality difference on YouTube will be negligible.


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Ace Singh
Re: 30min video 6 hour rendering time!
on Oct 5, 2016 at 2:57:35 am

I tried all of this, I want to use 2-pass because I need a decent file size for uploading....now I have a 10min video that is taking 9 HOURS to upload!

What the hell? Why is the time even longer now?!


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Wayne Waag
Re: 30min video 6 hour rendering time!
on Oct 5, 2016 at 3:18:29 am

The problem is your recording software--not Vegas. You need to find something compatible with Vegas--e.g. OBS. A 10 minute video should take no more than 20 minutes to render. Even with with my old i7 3770K, I can render 1080 60P footage in just a little slower than real-time, assuming no effects.

wwaag


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László Kovács
Re: 30min video 6 hour rendering time!
on Oct 5, 2016 at 5:06:26 am

The upload time depends on internet connection, I think.
The rendering time depends on source footage format is being used, but if effects are involved that can hugely impact the rendering speed.
So when it's about CPU only rendering (as the above posts makes me think) a chroma-key can increase render time a lot, and a blur is even worse in that aspect.

So far we got no information (or I did overlook it) about the contents of the project.
How many tracks are there in?
How many and what effects are involved?

Best regards

László Kovács


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Peter Holt
Re: 30min video 6 hour rendering time!
on Oct 5, 2016 at 6:36:03 am

I looked up OBS
https://obsproject.com/forum/resources/video-source-plugin.20/

Surely this is looking at it the wrong way. Vegas needs to support *common* video formats properly. Most people are stuck with whatever camera they have.

The only scenario I have heard of rendering anywhere near real time was on a Mac running Final Cut Pro, a very simple job, and using the Mac video coprocessor. Vegas doesn't use the majority of video cards for rendering... many threads on this.

I have just done a 80hr render of a 7hr video. Two tracks (one with continuous text subtitles - ex-GPS data actually), colour correction, contrast, NBFX lens correction. However these FX don't make a lot of difference to the wider issue. Removing them might reduce the render to something like 50hrs. The biggest factor by far is the output bitrate. I am rendering to 50mbits/sec. The output image size has no effect. Just the bit rate.


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Wayne Waag
Re: 30min video 6 hour rendering time!
on Oct 5, 2016 at 5:02:41 pm
Last Edited By Wayne Waag on Oct 5, 2016 at 6:15:42 pm

"Most people are stuck with whatever camera they have."

Agreed, but the OP is not doing a camera recording, he is using game recording software, a completely different kettle of fish.

Sorry--I see that he is adding webcam footage as well. Still--no reason for such excessive renderin times.

I did some tests awhile back using OBS for recording. The results can be found here.

https://forums.creativecow.net/readpost/24/1012989

At the time, I didn't do any speed tests for subsequent renders, but in general I get roughly 44 fps for 1080 60P renders using Handbrake, a much better encoder (IMHO) than those within Vegas. There is an available script that permits one-click operation. Adding levels, color curves and unsharpening drops it to around 38-39 fps. Again, this is on a 4yr old core i7, so newer systems should be faster.

wwaag


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