Video Preview Lag in Vegas pro 22.0

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john_dennis wrote on 6/5/2025, 5:43 PM

@katattack asked:

"Is this the best Quality I can obtain?"

No. Other less compressed codecs like uncompressed, MagicYUV, Apple Pro Res give better quality at the cost of large files size.

"Will this upload to YT fine?"

Don't get acquisition (capture) mixed up with delivery (render for upload). Each stage of work has its own constraints, most of which are not set by you or me.

" im going to edit this file into vegas without 're wrapping to mov' becuase i dont understand what that is or what that will do for me after"

My whole motivation in this thread is to pique your curiosity about how video encoding and decoding works. I've just used Apple Pro Res for my short screen captures for the longest time.

Many people use the MKV container because of its ability to survive glitches when recording for a long time, but Vegas Pro 22-250 doesn't handle AVC video and multi-track PCM audio well in an MKV wrapper. MOV works fine.

My rewrap examples were using Shutter Encoder (link: https://www.shutterencoder.com/) I encourage you to download, install and get familiar with it right away. The fact that you don't understand something only means you should begin investigating and learning about it.

"since this is a custom setting it wont remux to MP4 so i would jsut edit it and then export out for YT."

The captured file in the MKV wrapper will convert to MP4 but one has to use AAC audio at conversion time.

"Im also worried that if a file corrupts, i wont be able to get it back?"

Using the MKV wrapper ameliorates some of that worry, but often involves a conversion to be able to edit in Vegas Pro.

Your original post was about editability given your method of screen capture. There are many capture methods that will work well in Vegas Pro if you're willing to learn more. One option is the default that OBS uses out of the box.

john_dennis wrote on 6/5/2025, 7:36 PM

Try these OBS settings...

... if you want to

1) avoid rewrapping to MP4 or MOV

2) throw more bits at the problem by saving more I-frames

** Bit Rate is Driven by Screen Capture Complexity **

Note

Dropping an I-frame every 9 frames is somewhat radical on the continuum from

All-I............every 9 Frames ..................every 60 Frames (1 Second)......................every 250 Frames.

250 frames between I-frames is somewhat common among streaming services.

I hope you find this illustrative if not particularly useful.

General
Complete name                            : E:\OBS Captures\2025-06-05 16-54-31.mkv
Format                                   : Matroska
Format version                           : Version 4
File size                                : 1.59 GiB
Duration                                 : 1 min 28 s
Overall bit rate                         : 154 Mb/s
Frame rate                               : 59.940 FPS
Writing application                      : Lavf61.1.100
Writing library                          : Lavf61.1.100
ErrorDetectionType                       : Per level 1

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L5.1
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 4 frames
Format settings, GOP                     : M=4, N=9
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 1 min 27 s
Nominal bit rate                         : 100.0 Mb/s
Width                                    : 2 560 pixels
Height                                   : 1 440 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 59.940 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.453
Writing library                          : x264 core 164 r3106 eaa68fa

Encoding settings                        : cabac=1 / ref=1 / deblock=1:0:0 
/ analyse=0x3:0x113 / me=hex / subme=2 / psy=1 / psy_rd=1.00:0.00 
/ mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=1 
/ cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 
/ threads=45 / lookahead_threads=11 / sliced_threads=0 / nr=0 
/ decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 
/ bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 
/ open_gop=0 / weightp=1 / keyint=9 / keyint_min=1 / scenecut=40 
/ intra_refresh=0 / rc_lookahead=9 / rc=abr / mbtree=1 / bitrate=100000 
/ ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 
/ ip_ratio=1.40 / aq=1:1.00

Default                                  : No
Forced                                   : No
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio #1
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : A_AAC-2
Duration                                 : 1 min 28 s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Default                                  : No
Forced                                   : No

Audio #2
ID                                       : 3
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : A_AAC-2
Duration                                 : 1 min 28 s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Default                                  : No
Forced                                   : No

** Bits/(Pixel*Frame)            =           : 0.453 is in the range of what cameras record. **

Krym wrote on 6/13/2025, 11:14 PM

I have been trying to edit a video in Vegas Pro, but have been having troubles with Lag/stutter in the preview. (The video plays fine in other media players)

Initally I changed my video File from MKV to MP4 and it significantly changed the lag and stutters. It was almost un-editable because it would also freeze the application.

However, now as im adding in jump cuts and such, it is playing back at such a lag I cant even jump cut/edit it correctly.

Video Added as Example. ( unsure if it will upload but i made this wetransfer link: https://we.tl/t-RCyISNCGxo ) https://wetransfer.com/downloads/5ab95e00c0ebb850d613a8db2279497920250603014100/09f4151fca90354834deda18d1779f4d20250603014137/82f548?t_exp=1749174060&t_lsid=92884ccd-34a2-468d-a477-ac725500bf0e&t_network=email&t_rid=ZW1haWx8YWRyb2l0fDA5ZjFmNDQxLTkzM2YtNDcyOS04MmEyLWYwNmMxNmVmOWQ4ZA==&t_s=download_link&t_ts=1748914897

 

1. I am using Vegas Pro 22.0, legitimate version.

2. I used OBS studio to record.

Settings:

Output/base resolution: 2560x1440.
Video Encoder: NVIDIA NVENC H.264

Recording Format: MKV ( Then I used a program to make it MP4.)

Audio Encoder: FFmpeg AAC
Rate Control: Constant QP
Constant QP: 15

Keyframe Interval: 2s

Preset: P6: Slower(Better Quality)
Tuning: High Quality

Multipass mode: Two Passes ( Quarter Resolution)

Profile: High

 

3. I have AMD Radeon(TM) Graphics ( NVIDIA Geforce RTX 4070) Driver version: 32.0.15.7602

4. Windows 11, CPU: AMD Ryzen 7 7800X3D 8-core 4201 MHz, RAM: 32 GB 4800 Mhz

This is the Media info of the file:

General
Complete name                            : C:\Users\celin\Videos\2025-05-24 11-46-03.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/iso2/avc1/mp41)
File size                                : 23.6 GiB
Duration                                 : 16 min 37 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 203 Mb/s
Frame rate                               : 60.000 FPS
Writing application                      : Lavf58.76.100

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L5.1
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 4 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 16 min 37 s
Source duration                          : 16 min 37 s
Bit rate mode                            : Variable
Bit rate                                 : 203 Mb/s
Maximum bit rate                         : 16.0 Mb/s
Width                                    : 2 560 pixels
Height                                   : 1 440 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 60.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.918
Stream size                              : 23.6 GiB (100%)
Source stream size                       : 23.6 GiB (100%)
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
mdhd_Duration                            : 997150
Codec configuration box                  : avcC

Audio #1
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 16 min 37 s
Source duration                          : 16 min 37 s
Bit rate mode                            : Constant
Bit rate                                 : 288 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 34.3 MiB (0%)
Source stream size                       : 34.3 MiB (0%)
Default                                  : Yes
Alternate group                          : 1
mdhd_Duration                            : 997127

Audio #2
ID                                       : 3
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 16 min 37 s
Source duration                          : 16 min 37 s
Bit rate mode                            : Constant
Bit rate                                 : 170 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 20.2 MiB (0%)
Source stream size                       : 20.2 MiB (0%)
Default                                  : Yes
Alternate group                          : 2
mdhd_Duration                            : 997127

Audio #3
ID                                       : 4
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 16 min 37 s
Source duration                          : 16 min 37 s
Bit rate mode                            : Constant
Bit rate                                 : 2 271 b/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 277 KiB (0%)
Source stream size                       : 277 KiB (0%)
Default                                  : Yes
Alternate group                          : 3
mdhd_Duration                            : 997127

File properties in the Vegas window:

General
  Name: 2025-05-24 11-46-03.mp4
  Folder: (removed this information)
  Type: AVC
  Size: 24.76 GB (25,358,219,719 bytes)
  Created: Monday, June 2, 2025, 1:52:14 PM
  Modified: Monday, June 2, 2025, 1:52:55 PM
  Accessed: Monday, June 2, 2025, 6:42:39 PM
  Attributes: Archive

Media information
  Stream format: MPEG-4
  Video stream #1
    Video format: AVC
    Resolution: 2560 x 1440 px
    Aspect ratio: 16:9
    Color depth: 8 bit
    Frame rate: 60.000 fps
    Scan type: Progressive
    Bit rate mode: Variable
    Bit rate: 202955918 bps
  Audio stream #1
    Audio format: AAC
    Sampling rate: 48000 Hz
    Channels: 2 channels
    Bit rate mode: Constant
    Bit rate: 288000 bps
  Audio stream #2
    Audio format: AAC
    Sampling rate: 48000 Hz
    Channels: 2 channels
    Bit rate mode: Constant
    Bit rate: 288000 bps
  Audio stream #3
    Audio format: AAC
    Sampling rate: 48000 Hz
    Channels: 2 channels
    Bit rate mode: Constant
    Bit rate: 288000 bps

Streams
  Video: 00:16:37.150, 60.000 fps progressive, 2560x1440x32, AVC
  Audio 1: 00:16:37.150, 48,000 Hz, Stereo, AAC
  Audio 2: 00:16:37.150, 48,000 Hz, Stereo, AAC
  Audio 3: 00:16:37.150, 48,000 Hz, Stereo, AAC

Summary
  [TCFM]: 7

ACID information
  ACID chunk: no
  Stretch chunk: no
  Stretch list: no
  Stretch info2: no
  Beat markers: no
  Detected beats: no

Other metadata
  Regions/markers: no
  Command markers: no

Media manager
  Media tags: no

Plug-In
  Name: so4compoundplug.dll
  Folder: C:\Program Files\VEGAS\VEGAS Pro 22.0\FileIO Plug-Ins\so4compoundplug
  Format: AVC
  Version: Version 22.0 (Build 250)
  Company: MAGIX Computer Products Intl. Co.



I really appreciate any help on this!

 

Hi,

 

I record similarly to this spec (1440p), Here are my OBS settings: . I am assuming you are recording on 60FPS but your monitor is 144, so there will be some lag because 60 does not go into 144 evenly, Also make sure to enable legacy avc decoding and go to options -> preferences > preview device, and select the monitor you recorded with (1440p). Should help with the lagging preview (works on Vegas 19 and 22)

katattack wrote on 6/25/2025, 7:18 PM

Thank you both. I will try looking at those settings.

Im here again because I used the settings i was originally given, and now as im going to edit my video, i can put one video into vegas pro but the next one completely crashes vegas pro and im not sure why, as both were recorded on the same settings.

katattack wrote on 6/26/2025, 11:27 AM

@katattack asked:

"Is this the best Quality I can obtain?"

No. Other less compressed codecs like uncompressed, MagicYUV, Apple Pro Res give better quality at the cost of large files size.

"Will this upload to YT fine?"

Don't get acquisition (capture) mixed up with delivery (render for upload). Each stage of work has its own constraints, most of which are not set by you or me.

" im going to edit this file into vegas without 're wrapping to mov' becuase i dont understand what that is or what that will do for me after"

My whole motivation in this thread is to pique your curiosity about how video encoding and decoding works. I've just used Apple Pro Res for my short screen captures for the longest time.

Many people use the MKV container because of its ability to survive glitches when recording for a long time, but Vegas Pro 22-250 doesn't handle AVC video and multi-track PCM audio well in an MKV wrapper. MOV works fine.

My rewrap examples were using Shutter Encoder (link: https://www.shutterencoder.com/) I encourage you to download, install and get familiar with it right away. The fact that you don't understand something only means you should begin investigating and learning about it.

"since this is a custom setting it wont remux to MP4 so i would jsut edit it and then export out for YT."

The captured file in the MKV wrapper will convert to MP4 but one has to use AAC audio at conversion time.

"Im also worried that if a file corrupts, i wont be able to get it back?"

Using the MKV wrapper ameliorates some of that worry, but often involves a conversion to be able to edit in Vegas Pro.

Your original post was about editability given your method of screen capture. There are many capture methods that will work well in Vegas Pro if you're willing to learn more. One option is the default that OBS uses out of the box.

thank you. i took your advice and re wrapped a video that was crashing vegas pro into mp4 and it seems to be working now. i also wanted to say you are very knowledgeable and i really appreciate the time you take to explain things