Support of 4K ?

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Support of 4K ?

Postby Sebull » Sun Jan 11, 2015 9:35 am

Hello,

What about the support of 4K in RaceRender ?
Because i just have my brand new GoPro 4 and my 4K TV and would love to create 4K vidéo to YouTube to enjoy it.

Thanks.
Sebull
 
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Re: Support of 4K ?

Postby RaceRender LLC » Tue Jan 13, 2015 1:59 am

Hi. I expect this question to be coming up more frequently as time goes on, so I have added a Knowledge Base article explaining it, here: viewtopic.php?f=6&t=306
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Re: Support of 4K ?

Postby Sebull » Wed Jan 14, 2015 4:44 am

Thank you for the FAQ answer.

But there is no plan to support 4K in output in the future ?
because today our computer are ready to support 4K video with both H264 or the new H265 encoders and for example Windows 10 will support it natively in next summer.
I think 4K will be the next standard in 2015 like 1080p was in 2010.
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Re: Support of 4K ?

Postby RaceRender LLC » Wed Jan 14, 2015 5:47 pm

I would not expect 4K to become the dominant video recording format in the consumer market for some time to come, and it may take even longer for the average computer to have the power needed to process 4K video, but it is something that I've had my eye on. RaceRender has long supported everything needed for 4K (and more), except that the output has been limited to 1080p by the very last piece, the video encoder.

It does look like we can get the Windows Media Video encoder to do 4K for us now, so the very next release of RaceRender (version 3.1.1) for Windows will attempt to support up to 4K output using WMV. This will need Windows 7 or newer (preferably 8.1 64-bit, or 10 when it comes out). The hugely increased workload on the system means that it will render much more slowly than 1080p, and encoding in WMV is already usually a little slower than H.264 as it is. For example, I had a short video render take about 21 seconds for 1080p H.264, 30 seconds for 1080p WMV, and over 90 seconds for 4K WMV. That's with 1080p input video, so 4K input video would likely slow things down even further. The ETA calculation that's displayed will probably jump all over the place due to some normally occurring lags which are now greatly amplified, but that's ok. Users may also see some encoding problems if attempting this on computers that can't process fast enough to stay within certain time limits.

As for .MP4 file output, the H.264 encoder in Windows 7, 8, and 8.1, fails when we give it anything beyond 1080p. We also see the same behavior on the Mac side, as of OS X 10.10 (Mavericks). This is probably because they don't support H.264's version 5.1 encoding profile that is needed for 4K video. That might improve with newer OS versions, but no luck with this on Windows 10's "Tech Preview" release yet, so we'll have to wait and see if the final release improves that or if it includes an HEVC / H.265 encoder that we can use...
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Re: Support of 4K ?

Postby Sebull » Thu Jan 15, 2015 3:24 pm

Ok thank you to take time to answer my questions, i understand your point.

is there anyway to have an answer on this topic also ? viewtopic.php?f=3&t=241&p=791#p791

thanks.
Sebull
 
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