VS2020 output video JERKS, VS2019 does not

[Testpilot]

Hi,
I installed Windows 10 since VS2020 does not run perfect (nice said) in WIndows 7. VS2019 runs good in Windows 7.

Now I made a project in 4k 30p with a brandnew install of Windows 10 x64 and Videostudio 2020 and my final rendered video is jerking. Normally this happens, when rendering a 25p input into a 30p output.

Input material: 3840x2160 | 29,97p | 100MBits | H264 from GoPro Hero 8 + 1920x1080 | 59,97p | 35 MBits from Canon EOS M100
Output settings: 3840x2160 | 29,97p | 65MBits | H264 "AVCHD HIGH" MP4

I rendered with CUDA-Acceleration, INTEL-Acceleration and no Acceleration, but anytime the output video jerks ands tutters. Playback on YouTube too. Watch GoPro-Scenes in https://youtu.be/zhLdDUbH4mg and watch left and right sides - trees popping instead of flowing.

After that I installed "old" VS 2019 over the VS 2020 installation and rendered the same settings with same input, but not the same project, since I can't import VS2020.vsp into VS2019, the output video was smooth as it should be.

[tletter]

Watch GoPro-Scenes in https://youtu.be/zhLdDUbH4mg and watch left and right sides - trees popping instead of flowing.

You posted a 45 minute video without giving a time code where we can see the issue - don't think that many will watch for 45 minutes to try and find your issue. You can easily include a time code in a link, e.g. https://youtu.be/zhLdDUbH4mg?t=1637. However, without being able to compare the source video to the rendered video it's not possible to say that there is any appreciable image degradation.

Input material: 3840x2160 | 29,97p | 100MBits | H264 from GoPro Hero 8 + 1920x1080 | 59,97p | 35 MBits from Canon EOS M100
Output settings: 3840x2160 | 29,97p | 65MBits | H264 "AVCHD HIGH" MP4

Degradation will result when downresing from 100MBits to 65MBits, trying to upresing from 35MBits to 65MBits, and trying to upscale from 1920x1080 to 3840x2160.

tletter
https://www.youtube.com/user/tletter

[Ken Berry]

You also don't say whether you used SmartProxy anywhere in making the project.

[Testpilot]

You posted a 45 minute video without giving a time code where we can see the issue - don't think that many will watch for 45 minutes to try and find your issue.

Try anything from Minute 1:09! This is the "GoPro Part" (You can identify this by the very wide angle footage) and watch especially beginning from minute 2:09 - Watch the trees popping at the side!
If You watch more accurate before minute 1:09, this is the M100 (FHD) Part, You'll see the jerkings too. Pay attention to the movings in this part of the video.
And again: input, editing and rendering is constantly in 30/60p - not mixed between 25/50 or 24 or 30/60!

Degradation will result when downresing from 100MBits to 65MBits, trying to upresing from 35MBits to 65MBits, and trying to upscale from 1920x1080 to 3840x2160.

65 MBits is maximum. I'd use 100 MBits for rendering, if it would be available. But as I said, the Problem doesn't appear in VS2019. Bitrate has nothing to do with popping and jerking, but with block formation on poor bitrate.
And the mainpart of this video is in 100 MBits, 4K 30p. So I upscale und up-bitrate the very small part, with the known problems I know, since I use Videostudio. (Ulead Mediastudio Pro in bundle with a firewirecard was my first Edition)

You also don't say whether you used SmartProxy anywhere in making the project.

Of course do I "Smartproxy". Does it matter? Smartproxy is for editing, not for rendering I thougt. But, as I said, in VS2019 I had and I have this jerky-problem not. Same PC, same Drivers, same Windows. Smartproxy on in VS2019!
I had other problems with VS2020 in Windows7. It crashed over and over again. Destroyed complete projects after crashes (removing cutIn cutOuts after saving the Project, loosing trackings from face-blurring, etc etc, so I decided to switch to Windows 10 - funfact: with Windows 7 and VS2019 I had much less problems!

Of course I read some threads here, were user had and still have problems with poor renderquality in VS2020 with CUDA Acceleration. Yes, I "Smartproxy" and I seems, that VS2020 has problems with CUDA, because additionally to the jerks I had in some renderings very poor bitrate-quality, but details of the rendered .MP4-files shows, they are in 65MBits. Looked as if VS2020 was using smartproxy .upx-files instead of inputvideo, upscaled it to 4K and renders them.
With CUDA off, bitrate-quality was good as it should be, but jerks were still present. And again, same videofiles rendered in VS2019 are smooooooooth!

[Ken Berry]

I asked about SmartProxy because sometimes using it has caused problems for some users. There was even a problem where somehow or other the properties used by SmartProxy files got transferred over to the final output. That problem, however, was with VS 2019 and not VS2020. See https://forum.corel.com/viewtopic.php?p=377229#p377229

But it made me wonder. The solution there was to make a different SmartProxy template of your own with different properties to those in the preset used by VS. You could, for instance, check what SmartProxy properties are used in your VS2019 and make a SmartProxy template using those Properties in VS2020 if they are different. Then you could test to see if you still have the problem.

I was also wondering if you could make a short test project using some of the clips in your current project, but turn SmartProxy off, and then render to see if the problem is still in the final output.

[Vdanny]

Can you try rendering the GoPro footage through Handbrake at 29.97 constant frame rate (it shows 59.97 for your input) and see if 2020 will render the project properly? Doesn't explain why it should be different between versions.

[lata]

Make sure your project properties are the same as your output settings, especially the frame rate of 29.97

Output settings: 3840x2160 | 29,97p | 65MBits | H264 "AVCHD HIGH" MP4

[tletter]

watch especially beginning from minute 2:09 - Watch the trees popping at the side!

No trees were seen to be popping (whatever that means), but I did see some small white flakes in the scene, e.g. after https://youtu.be/zhLdDUbH4mg?t=170, which I assumed was either snowflakes or tree pollen.

65 MBits is maximum. I'd use 100 MBits for rendering, if it would be available.

Not true, as I've rendered 4K @ 100Mbps for years (see att image).

tletter
https://www.youtube.com/user/tletter

[Testpilot]

Short interim conclusion:

I have an EOS M6 MII too. (4K 30p @ 120 MBits).
VS2020: Import first clip from M6II and set project to the settings from this clip. Rendersettings "... same as first clip" and my output does not jerk and! it is not limited by 65Mbits, it has 110Mbits. Thanks to "tletter".

Smartproxy was set as it was (auto) and all files are "smartproxied" before I put together my project - for best workflow.

I'll be testing further for a solution of my problem vs2020 / vs2019.

[Testpilot]

Now I got the final solution for my problem!

Since my CPU (i5 2500k) is from 2011, it does not support H265 and my old GPU (GTX 670) just like that.
Now I switched over to a GTX 1050 Ti (the only alternate in this times) with hardware supported H265 de- and encode, my renderings play smooth, as it should be. Smooth, as the in input footage from the GoPro.
It has nothing to do with H265 hartdware acceleration in this case, because my in- and output was H264 4K 30p.
It must have to do with the GPU. Interesting to know, CUDA makes "bad compression - artefacts" and with no HW-Acceleration the output video is smooth too. Sounds weird, but it is, what ist is.

VS 2019 ist set to, that it renders HW-CUDA (encode), but in Taskmanager the GPU works 0% in encode. That must be the reason, why VS2019 worked better than VS2020.

[Testpilot]

... disregard!

Input-Material: DJI Air 2s 3840x2160 30p 100 MBits.
Smartproxy off, CUDA De- & Encode / H265 65 MBits MP4: smooth but very poor bitrate-quality and footage destroyed at beginning and at the end (green and color-ghosting) fast rendering CPU <60% GPU >80%
Smartproxy off, CUDA Encode / H265 65 MBits MP4: smooth but poor bitrate-quality, no green and color-ghosting fast rendering
Smartproxy off, QuickSync De- & Encode / H265 65 MBits MP4: jerky, jumping video, good video quality, no green and color-ghosting slow rendering CPU 100% GPU <10%
Smartproxy off, no HW-Acceleration / H265 65 MBits MP4: jerky, jumping video, good video quality, no green- and color-ghosting

Watch the Trees, not me, to see what I mean!
CUDA De- & Encode ON: https://youtu.be/5nSr2EZcOhE
Intel QS Encode ON: https://youtu.be/jBZXKx7AGQ0
HW-Acceleration OFF: https://youtu.be/PSxh4uvkMGg
Original Footage: https://youtu.be/Wsso6Mt--5Q

Google Drive for non-youtube-compressed files: https://drive.google.com/drive/folders/ ... sp=sharing

Same tested in Adobe Premiere as noob:
Output: HIGH 4K 3840x2160 80 MBits: As smooth as the original-footage out of the AIR 2s.

Conclusion: After Mediastudio, Videostudio X8, X10, 2018, 2019 and 2020 I will stop working with Videostudio.

in deutsch:

Egal, wie ich Videostudio 2020 einstelle, bekomme ich entweder ruckelige Videos oder Videos in sehr schlechter Bildqualität.
Mit CUDA an und Smartproxy an kann ich flott rendern. Aber dann ist das Bild sehr schlecht, dafür aber flüssig.
Mit CUDA an und Smartproxy aus rendere ich genauso flott, aber das Bild ist immer noch schlecht. Sieht aus, wie eine schlechte Bildrate mit vermatschten Details und Klötzchen (trotz 65 MBits bei 4K 30p)
Mit Intel Quick Sync stottert das Video so, als hätte ich 50p-Material in 30p gerendert. Dafür ist die Bildqualität bei 65 MBits in 4K 30p sehr gut.
Mit Hardware-Acceleration aus stottert das Video genauso und die Bildqualität ist sehr gut.

Daher kann es einfach nur noch die eine Lösung geben, da ich seit Dezember nun diese Probleme habe und ich vermute, dass die Codecs in Videostudio total veraltet sind, weil mein PC mit Adobe Premiere das gleiche Video absolut perfekt rendert.
Diese Lösung wird sein, nach Jahrzehnten Videostudio nun den Schlussstrich zu ziehen!