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.