Weird Juddery Render on Long Video

js979047079 wrote on 7/27/2023, 6:32 AM

I'm running Vegas 20 build 411 here :)

I'm rendering off a 1hr20m video and running into issue on my render, I get this weird juddery effect.

Rendering to MAGIX AVC/AAC and MAGIX HVEC/ACC .mp4 formats

The issue only seems to arise with longer renders and occur about 30 minutes into the file

Example:

The source footage is 50fps (from my Blackmagic Video Assist) and so far I have tried:

Rendering the project in 50fps
Rendering the project in 25fps
Rendering the project in 25fps, undersampling the 50fps video by 0.500
Updating my GPU
Disabling GPU acceleration
Rendering the project on my laptop

The footage does not judder playing back on the timeline.

None of these fix the problem. I have successfully rendered similar projects with the same equipment before with vegas...

I'm rendering into a dropbox folder on an external drive, could this be it?

I'm really at a loss here...

Can anyone help? :)

Vegas 20.0 (Build 411)
Windows 10 Home v22H2
Device - Blackmagic VideoAssist
NVIDIA GeForce GTX 1080

MediaInfo

General
Complete name                            : I:.mov
Format                                   : QuickTime
Format/Info                              : Original Apple specifications
File size                                : 25.0 GiB
Duration                                 : 45 min 17 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 79.0 Mb/s
Frame rate                               : 50.000 FPS
Encoded date                             : 2023-04-23 09:45:03 UTC
Tagged date                              : 2023-04-23 09:45:03 UTC
Writing library                          : Apple QuickTime

Video
ID                                       : 1
Format                                   : ProRes
Format version                           : Version 0
Format profile                           : 422 Proxy
Codec ID                                 : apco
Duration                                 : 45 min 17 s
Bit rate mode                            : Variable
Bit rate                                 : 75.8 Mb/s
Width                                    : 1 920 pixels
Clean aperture width                     : 1 888 pixels
Height                                   : 1 080 pixels
Clean aperture height                    : 1 062 pixels
Display aspect ratio                     : 16:9
Clean aperture display aspect ratio      : 16:9
Frame rate mode                          : Constant
Frame rate                               : 50.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:2
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.731
Stream size                              : 24.0 GiB (96%)
Writing library                          : bmd0
Language                                 : English
Encoded date                             : 2023-04-23 09:45:03 UTC
Tagged date                              : 2023-04-23 09:45:03 UTC
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio
ID                                       : 2
Format                                   : PCM
Format settings                          : Little / Signed
Codec ID                                 : in24
Duration                                 : 45 min 17 s
Bit rate mode                            : Constant
Bit rate                                 : 2 304 kb/s
Channel(s)                               : 2 channels
Sampling rate                            : 48.0 kHz
Bit depth                                : 24 bits
Stream size                              : 746 MiB (3%)
Language                                 : English
Encoded date                             : 2023-04-23 09:45:03 UTC
Tagged date                              : 2023-04-23 09:45:03 UTC

General
Complete name                            : I:\PSSA\Dulwich\Multi\PSSA_Matilda_1.mov.sfk
File size                                : 3.89 MiB

General
Complete name                            : I:\PSSA\Dulwich\Multi\PSSA_Matilda_2.mov
Format                                   : QuickTime
Format/Info                              : Original Apple specifications
File size                                : 25.6 GiB
Duration                                 : 46 min 22 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 79.0 Mb/s
Frame rate                               : 50.000 FPS
Encoded date                             : 2023-04-23 10:48:39 UTC
Tagged date                              : 2023-04-23 10:48:39 UTC
Writing library                          : Apple QuickTime

Video
ID                                       : 1
Format                                   : ProRes
Format version                           : Version 0
Format profile                           : 422 Proxy
Codec ID                                 : apco
Duration                                 : 46 min 22 s
Bit rate mode                            : Variable
Bit rate                                 : 75.8 Mb/s
Width                                    : 1 920 pixels
Clean aperture width                     : 1 888 pixels
Height                                   : 1 080 pixels
Clean aperture height                    : 1 062 pixels
Display aspect ratio                     : 16:9
Clean aperture display aspect ratio      : 16:9
Frame rate mode                          : Constant
Frame rate                               : 50.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:2
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.731
Stream size                              : 24.6 GiB (96%)
Writing library                          : bmd0
Language                                 : English
Encoded date                             : 2023-04-23 10:48:39 UTC
Tagged date                              : 2023-04-23 10:48:39 UTC
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio
ID                                       : 2
Format                                   : PCM
Format settings                          : Little / Signed
Codec ID                                 : in24
Duration                                 : 46 min 22 s
Bit rate mode                            : Constant
Bit rate                                 : 2 304 kb/s
Channel(s)                               : 2 channels
Sampling rate                            : 48.0 kHz
Bit depth                                : 24 bits
Stream size                              : 764 MiB (3%)
Language                                 : English
Encoded date                             : 2023-04-23 10:48:39 UTC
Tagged date                              : 2023-04-23 10:48:39 UTC

General
Complete name                            : I:\PSSA\Dulwich\Multi\PSSA_Matilda_2.mov.sfk
File size                                : 3.98 MiB

Comments

Wolfgang S. wrote on 7/27/2023, 6:36 AM

You tell us nothing that helps us to help you. Was it BRAW or ProRes, for example?

https://www.vegascreativesoftware.info/us/forum/important-information-required-to-help-you--110457/

js979047079 wrote on 7/27/2023, 6:37 AM

Sorry Wolfgang - was just adding that info then - I published too early

Wolfgang S. wrote on 7/27/2023, 6:40 AM

js979047079 wrote on 7/27/2023, 6:44 AM

ok

Updated with more info :)

Dexcon wrote on 7/27/2023, 7:06 AM

I'm rendering into a dropbox folder on an external drive, could this be it?

One way to find out is to render the project - even a partial section of the project - to an internal drive on your computer.

I have successfully rendered similar projects from the same equiptment before with vegas...

Which version and build of Vegas Pro have previously achieved those successful results?

In Project Properties, you have selected "Legacy 8-bit (video levels)" - is there any reason for that setting rather than "8-bit (full range)"?

Also, have you tried the various options under "Resample Mode" to see if another resampling option is better?

Also, please note that the information that you have given is only a small proportion of the information requested by the link provided by earlier by Wolfgang S. For example, while you have provided your GPU, there is nothing so far about the rest of your computer details like CPU, RAM etc. As well a MediaInfo report (a free app) of a representative example of the media that you are using on Vegas Pro's timeline.

Wolfgang S. wrote on 7/27/2023, 7:54 AM

And please give us more specifications of your PC - size of ram for example? GPU? and so on.

And what were the render settings? Which encoder did you use?

js979047079 wrote on 7/27/2023, 8:32 AM

And please give us more specifications of your PC - size of ram for example? GPU? and so on.

And what were the render settings? Which encoder did you use?

Thanks for your patience, I have added more information to my post :)

js979047079 wrote on 7/27/2023, 8:35 AM

I'm rendering into a dropbox folder on an external drive, could this be it?

One way to find out is to render the project - even a partial section of the project - to an internal drive on your computer.

The issue only seems to occur when rendering longer project files.

I have successfully rendered similar projects from the same equiptment before with vegas...

Which version and build of Vegas Pro have previously achieved those successful results?

In Project Properties, you have selected "Legacy 8-bit (video levels)" - is there any reason for that setting rather than "8-bit (full range)"

There is no specific reason for this other than it was set to that be default

Also, have you tried the various options under "Resample Mode" to see if another resampling option is better?

Other modes introduce horrible frame blending etc, which is why I disable it 50fps to 25fps shouldn't be introducing any resampling though, right? :)

Also, please note that the information that you have given is only a small proportion of the information requested by the link provided by earlier by Wolfgang S. For example, while you have provided your GPU, there is nothing so far about the rest of your computer details like CPU, RAM etc. As well a MediaInfo report (a free app) of a representative example of the media that you are using on Vegas Pro's timeline.

Thanks for your patience, I have added more information and MediaInfo to my post :)

Dexcon wrote on 7/27/2023, 8:55 AM

I asked before:

Which version and build of Vegas Pro have previously achieved those successful results?

and the answer was:

There is no specific reason for this other than it was set to that be default

Please specify the version and build of Vegas Pro that you have previously successfully used to render your projects - surely that is not a hard question to answer. My overall feeling is that there is a reluctance on your part to provide fulsome information about the issue. If you want help, please help yourself by helping the forum with proper information. Your choice.

Wolfgang S. wrote on 7/27/2023, 9:05 AM

js979047079 wrote on 7/27/2023, 1:32 PM

I'm running Vegas 20 build 411 here :)

That was mentioned in the very beginning.

Not sure from the information we have up to now. The i7 6700K is a older processor with 4 cores only - but that is still in the technical specification of Vegas for HD.

What are the settings in the preferences for video, and for file I/O? Please post snapshoots.

Wolfgang S. wrote on 7/27/2023, 9:08 AM

And what driver is installed for the Intel HD graphic card 530 and the GTX 1080?

Dexcon wrote on 7/27/2023, 9:09 AM

js979047079 wrote on 7/27/2023, 1:32 PM

I'm running Vegas 20 build 411 here :)

That was mentioned in the very beginning.

Yes, I know that. But my question was what Vegas Pro version and build was the OP using when the rendering worked? - based on:

I have successfully rendered similar projects with the same equipment before with vegas...

js979047079 wrote on 7/27/2023, 9:11 AM

I asked before:

Which version and build of Vegas Pro have previously achieved those successful results?

and the answer was:

There is no specific reason for this other than it was set to that be default

Please specify the version and build of Vegas Pro that you have previously successfully used to render your projects - surely that is not a hard question to answer. My overall feeling is that there is a reluctance on your part to provide fulsome information about the issue. If you want help, please help yourself by helping the forum with proper information. Your choice.

I would suggest your feeling about my post are simply your feelings about the matter. I don't want to seem griefy, but your post does seem unnecessarily unfriendly to a new user of this forum.

It's worth mentioning that I have updated the post with the information required since you and Wolfgang made those suggestions.

I am new to this forum and this is my first post. I am trying to be as useful as possible in providing information for help - which you are kindly providing me with - I do appreciate this. I simply missed this question in your longer post. Nothing more or less.

Answer: It was achieved on the very same version, with the same source file type, and machine.

js979047079 wrote on 7/27/2023, 9:14 AM

js979047079 wrote on 7/27/2023, 1:32 PM

I'm running Vegas 20 build 411 here :)

That was mentioned in the very beginning.

Not sure from the information we have up to now. The i7 6700K is a older processor with 4 cores only - but that is still in the technical specification of Vegas for HD.

What are the settings in the preferences for video, and for file I/O? Please post snapshoots.

Thank you - here are the screenshots you have asked for :)

Wolfgang S. wrote on 7/27/2023, 9:18 AM

I would reset the dynamic ram preview to default - 50% are high.

And I would enable CPU acceleration - to have that off for ProRes is maybe not a good idea.

Can the hardware decoder in the I/O settings be set to the i-GPU of your processor?

js979047079 wrote on 7/27/2023, 9:19 AM

And what driver is installed for the Intel HD graphic card 530 and the GTX 1080?

Also this - I can't find the Intel HD Graphics Card in my Device Manager, unfortunately

3POINT wrote on 7/27/2023, 9:19 AM

Your footage is 50p, set also your project settings to 50p. What rendertemplate do you use?

js979047079 wrote on 7/27/2023, 9:21 AM

I would reset the dynamic ram preview to default - 50% are high.

And I would enable CPU acceleration - to have that off for ProRes is maybe not a good idea.

I really appreciate this help, Wolfgang :)

I have reset to default

By CUP acceleration - do you mean GPU Acceleration, or have I missed something? :)

Can the hardware decoder in the I/O settings be set to the i-GPU of your processor?

It can be set to 'NVDEC on NVIDIA Geforce GTX 1080' - should I enable that from the 'Auto' setting - I have a choice of Auto, off or that device

js979047079 wrote on 7/27/2023, 9:22 AM

Your footage is 50p, set also your project settings to 50p. What rendertemplate do you use?

Hey 3Point, I have tried a 50fps project and render settings, and have the same issues :/

j-v wrote on 7/27/2023, 9:27 AM

Also this - I can't find the Intel HD Graphics Card in my Device Manager, unfortunately

Than you have to allow it in the BIOS to show up and get working.
After that you have to reset Vegas following exactly this : https://www.vegascreativesoftware.info/us/forum/faq-how-can-i-reset-vegas-pro-to-default-settings--104646/

RogerS wrote on 7/27/2023, 9:28 AM

Yes, GPU acceleration in preferences/ video.

For the iGPU you may have to enable it in your motherboard's bios for it to appear in device manager and then VEGAS. Highly recommended to get it working for decoding support.

js979047079 wrote on 7/27/2023, 9:28 AM

Also this - I can't find the Intel HD Graphics Card in my Device Manager, unfortunately

Than you have to allow it in the BIOS to show up and get working.
After that you have to reset Vegas following exactly this : https://www.vegascreativesoftware.info/us/forum/faq-how-can-i-reset-vegas-pro-to-default-settings--104646/

Thank you, I will report back :)

js979047079 wrote on 7/27/2023, 9:31 AM

Yes, GPU acceleration in preferences/ video.

For the iGPU you may have to enable it in your motherboard's bios for it to appear in device manager and then VEGAS. Highly recommended to get it working for decoding support.

I'm doing a render currently with some other settings, but as soon as it is done, I shall do this. I didn't know about this - thank you :)