Hi everyone, I just upgraded to Vegas Pro 21 from 14. I've Googled around and looked through the forums for a while but haven't found anything that's fixed my issue yet. I've been trying to cut up clips from a very large 4K video file for a YouTube project and every rendering preset I've tried has resulted in stuttering video post-render, while the source video has none of those issues. I've made sure that all the presets I'm using are adjusted to match the FPS of the source vid, I've disabled resampling... not sure what else to try. Oddly, I tried importing the same source video file into Vegas 14 and tried rendering with the MainConcept AVC/AAC Internet 4K 2160p template (with the framerate adjusted to match) and it got rid of the stuttering, but the audio was out of sync (both in the rendered video and within the Vegas project, I later noticed), which was never an issue when I worked with the file in version 21. Would love any insights - hopefully I've posted all the relevant info.
Computer & software information
VEGAS: Version 21.0 (Build 108)
OS: Windows 10 Home, Version 22H2
Graphics card: NVIDIA GeForce GTX 3070
Processor: Intel(R) Core(TM) i5-4690K CPU @ 3.50GHz 3.50 GHz
Installed RAM: 16.0 GB
GPU acceleration: "Optimal - NVIDIA GeForce GTX 3070"
"Enable legacy AVC decoding": unchecked
"Enable legacy HEVC decoding": checked
"Hardware decoder to use": "Auto - NVDEC on NVIDIA GeForce GTX 3070"
Media info:
General
Complete name: F:\Videos\source.mp4
Format: MPEG-4
Format profile: Base Media
Codec ID: isom (isom/dby1/iso2/mp41)
File size: 45.4 GiB
Duration: 2 h 4 min
Overall bit rate: 52.3 Mb/s
Frame rate: 23.976 FPS
Movie name: source
Writing application: Lavf60.3.100
Video
ID: 1
Format: HEVC
Format/Info: High Efficiency Video Coding
Format profile: Main 10@L5.1@High
HDR format: SMPTE ST 2086, HDR10 compatible
Codec ID: hev1
Codec ID/Info: High Efficiency Video Coding
Duration: 2 h 4 min
Bit rate: 51.7 Mb/s
Width: 3 840 pixels
Height: 2 160 pixels
Display aspect ratio: 16:9
Frame rate mode: Variable
Frame rate: 23.976 (24000/1001) FPS
Minimum frame rate: 23.810 FPS
Maximum frame rate: 24.390 FPS
Color space: YUV
Chroma subsampling: 4:2:0 (Type 2)
Bit depth: 10 bits
Bits/(Pixel*Frame): 0.260
Stream size: 44.8 GiB (99%)
Color range: Limited
Color primaries: BT.2020
Transfer characteristics: PQ
Matrix coefficients: BT.2020 non-constant
Mastering display color primaries: Display P3
Mastering display luminance: min: 0.0020 cd/m2, max: 1000 cd/m2
Maximum Content Light Level: 595 cd/m2
Maximum Frame-Average Light Level: 494 cd/m2
mdhd_Duration: 7450234
Codec configuration box: hvcC
Audio
ID: 2
Format: AC-3
Format/Info: Audio Coding 3
Commercial name: Dolby Digital
Codec ID: ac-3
Duration: 2 h 4 min
Bit rate mode: Constant
Bit rate: 640 kb/s
Channel(s): 6 channels
Channel layout: L R C LFE Ls Rs
Sampling rate: 48.0 kHz
Frame rate: 31.250 FPS (1536 SPF)
Compression mode: Lossy
Stream size: 568 MiB (1%)
Title: AC3 5.1
Language: English
Service kind: Complete Main
Default: Yes
Alternate group: 1
Vegas File Properties:
General
Name: source.mp4
Folder: F:\Videos
Type: Intel HEVC
Size: 47.57 GB (48,713,723,359 bytes)
Created: Sunday, October 8, 2023, 11:46:23 AM
Modified: Monday, October 9, 2023, 5:39:18 PM
Accessed: Monday, October 9, 2023, 5:39:20 PM
Attributes: Archive
Streams
Video: 02:04:10.243, 24.001 fps progressive, 3840x2160x32, HEVC
Audio: 02:04:02.326, 48,000 Hz, Stereo, AC-3 5.1
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: mxhevcplug.dll
Folder: C:\Program Files\VEGAS\VEGAS Pro 21.0\FileIO Plug-Ins\mxhevcplug
Format: Intel HEVC
Version: Version 21.0 (Build 108)
Company: MAGIX Computer Products Intl. Co.