V22 - Build 250 - Laggy and Slow playback/editing

Philuk wrote on 5/19/2025, 3:00 PM

Hi,
Would someone be able to suggest a way of reducing the lag when editing? Admittedly I’m using a lot of 4K footage ( MXF. GoPro 11 and DJI Mavic 3 Pro), although I've converted all the video files to proxies in Vegas.

Even so, it’s still very, very slow and laggy. The .mxf files audio and video in the trimmer are very stuttery, and when I highlight a section in the trimmer using the mouse to pick up and drop onto the timeline, it doesn’t take, and then I have to keep highlighting the video clip several  times till it does. -See YT clip - 

It plays okay-ish on the timeline, although again there is a lag when I press play.

 

I’ve attached two screenshots of my properties and my File I/O options and this link below to a clip.

Any help would be gratefully received. 

Cheers

Phil

Vegas 22 - build 250
System Spec - 
Processor 12th Gen Intel(R) Core(TM) i9-12900KS 3.40 GHz
Installed RAM 64.0 GB (63.7 GB usable)
Device ID C15CCD21-002F-4FD1-9F97-9EE62613AD0D
Product ID 00330-73750-84820-AAOEM
System type 64-bit operating system, x64-based processor
Windows 11 Pro
Graphics card = Nvidia GeForce RTX3080
Video specs here


MXF - 
Format version                           : 1.3
Format profile                           : OP-1a
Format settings                          : Closed / Complete
File size                                : 1.38 GiB
Duration                                 : 47 s 320 ms
Overall bit rate                         : 250 Mb/s
Encoded date                             : 2025-05-15 14:28:15.000
Writing application                      : Sony Mem 2.00

Video
ID                                       : 2
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High 4:2:2 Intra@L5.1
Format settings, CABAC                   : No
Format settings, GOP                     : N=1
Format settings, wrapping mode           : Frame
Codec ID                                 : 0D01030102106001-0401020201323001
Duration                                 : 47 s 320 ms
Bit rate                                 : 241 Mb/s
Maximum bit rate                         : 250 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate                               : 25.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:2
Bit depth                                : 10 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 1.160
Stream size                              : 1.33 GiB (96%)
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Delay_SDTI                               : 54305200


GoPro - Format                                   : MPEG-4
Format profile                           : Base Media / Version 1
Codec ID                                 : mp41 (mp41)
File size                                : 953 MiB
Duration                                 : 1 min 6 s
Overall bit rate                         : 120 Mb/s
Encoded date                             : UTC 2025-05-15 14:18:35
Tagged date                              : UTC 2025-05-15 14:18:35

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main@L6@Main
Codec ID                                 : hvc1
Codec ID/Info                            : High Efficiency Video Coding
Duration                                 : 1 min 6 s
Bit rate                                 : 120 Mb/s
Width                                    : 4 000 pixels
Height                                   : 3 000 pixels
Display aspect ratio                     : 4:3
Frame rate mode                          : Constant
Frame rate                               : 50.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Bits/(Pixel*Frame)                       : 0.200
Stream size                              : 951 MiB (100%)
Title                                    : GoPro H.265
Language                                 : English
Encoded date                             : UTC 2025-05-15 14:18:35
Tagged date                              : UTC 2025-05-15 14:18:35
Color range                              : Full
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Codec configuration box                  : hvcC

Drone -  Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/iso2/mp41)
File size                                : 16.9 GiB
Duration                                 : 19 min 33 s
Overall bit rate                         : 124 Mb/s
Encoded date                             : UTC 2025-05-15 14:34:36
Tagged date                              : UTC 2025-05-15 14:34:36
Writing application                      : DJIMavic3Cine
Cover                                    : Yes
snal                                     : (Binary)
tnal                                     : (Binary)

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main@L6@Main
Codec ID                                 : hvc1
Codec ID/Info                            : High Efficiency Video Coding
Duration                                 : 19 min 33 s
Bit rate                                 : 120 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 50.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Bits/(Pixel*Frame)                       : 0.289
Stream size                              : 16.4 GiB (97%)
Encoded date                             : UTC 2025-05-15 14:34:36
Tagged date                              : UTC 2025-05-15 14:34:36
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Codec configuration box                  : hvcC
 

Comments

RogerS wrote on 5/19/2025, 3:05 PM

Don't shoot 10-bit 422 AVC would be my suggestion as your GPU can't decode it and the CPU has to do all the work. If you must shoot this format create proxy files in VEGAS. 10-bit 420 AVC or HEVC is a much better choice.

Also uncheck legacy AVC and experimental HEVC decoding in general and set the hardware decoder to the default, your RTX 3080.

Philuk wrote on 5/20/2025, 8:28 AM

Thanks Roger for taking the time to reply. Sadly it's not resolved the issue. It's still stuttering, laggy and missing parts of audio. Someone on another thread suggested I use voukoder.org, so I'll give that a go.

It's always diffiuclt to pin down whether its a software or hardware issue...fingers crossed the Voukoder will work. I'll report back!

Cheers

Phil

 

RogerS wrote on 5/20/2025, 11:08 AM

@Philuk It think it's most likely a media issue.

I don't see how Voukoder would help- that's for rendering.

You right-clicked on the media in project media and clicked "create video proxy?"

Otherwise you can batch convert them all to an easier to edit format. I use ShutterEncoder for this. Apple ProRes works well but file sizes are large. Regular output format h264 works fine if you don't need the 10-bit 422 precision. Otherwise you can do 10-bit HEVC.

Philuk wrote on 5/20/2025, 12:20 PM

Thanks, I'll give it go.

MarkAnthony121 wrote on 5/20/2025, 3:40 PM

Thanks, I'll give it go.

It's the media for sure friend. I've been editing HEVC and AVC 10bit 422 footage and anything over 24fps simply is unviewable to this day. I'm waiting (with little hope) for one more version of Vegas before going to Resolve. Butter smooth playback on all footage. Only way I manage is with proxies

Steve_Rhoden wrote on 5/20/2025, 7:10 PM

@MarkAnthony121 I use Shutter Encoder to easily convert any HEVC or AVC 10bit footage i have for smooth editing in Vegas. But if you wanna use Resolve instead, that's fine..... Just sharing personally what works easiest and fastest for me, and that's Vegas + Shutter Encoder.

MarkAnthony121 wrote on 5/20/2025, 7:12 PM

@MarkAnthony121 I use Shutter Encoder to easily convert any HEVC or AVC 10bit footage i have for smooth editing in Vegas. But if you wanna use Resolve instead, that's fine..... Just sharing personally what works easiest and fastest for me, and that's Vegas + Shutter Encoder.

What do you convert it to?

Philuk wrote on 6/1/2025, 2:42 PM

Hi Team,

A quick update with the HEVC route and Shutter Encoder. Unfortunately I got some strange pixelation artifacting going on as the two ladies peer over the bridge. Look at the trees on the left of frame and the rucksack. 

This is definitely a Shutter Encoder issue, and sadly time is running out on me to mess around further. I would advise not to use HEVC, as I have a suspicion this is causing the issue, plus it’s only slightly less laggy than Vegas proxies.

Just to recap, I’ve ditched using Vegas proxies as they are as laggy as the originals and there’s sound issues. Basically the audio track on the .mxf files does weird things, sometimes it plays, sometimes it doesn’t, or simply stops halfway through.

So, not to be downhearted! I’m now thinking about encoding to Apple ProRes Proxies for ease. I’ve done a test clip and all looks fine. My question is, when I come to render, how do I tell Vegas to use the original clips, which are .mxf and mp4? Or am I creating a world of pain? Or is it best to convert to Apple Pros LT and cut that?

Cheers

Phil

RogerS wrote on 6/1/2025, 8:38 PM

Proxies should have no lag, they are easy to play XDCAM files- you are playing them using the preview or draft quality setting in VEGAS? Best or good use the original file.

For ShutterEncoder in advanced settings limit the GOP to your framerate (30, 60, etc.)
If you convert to ProRes422 there's no need to use the original again.
I'm not sure what the MXF audio is as it's not in your MediaInfo but if PCM maybe an output format h264 in mov container with PCM audio could work well?

Otherwise "swap video files" or a script could help you go between the user-generated "proxy" and original- I believe HOS has that functionality built in.

That is strange pixelation and I have never seen a pattern like that before.

Philuk wrote on 6/2/2025, 2:55 AM

Thanks Roger. Yes playing with preview quality in preview and best of originals. I've decided to encode all to ProRes LT as I'm running out of time.

Unfortunately I do feel this, and the quality of the edit preview window, has always been Vegas's Achillies heal. The few times I've done a job using Premier and Resolve, the playback and image quality in the preview window is excellent. But! What you don't get it the rapid editing you can do with Vegas. I can work twice as fast on Vegas than I can on Prem or Res.

If Magix could work on emulating Adobe and BM playback and image preview, they would clean up the NLE market overnight. Fingers crossed someone in their team is reading this!!

Cheers

Phil