I have noticed that some of my latest videos has an audio delay, which gets bigger and bigger the longer the video is.
F.ex. 
In the beginning there is no delay, but by the end its significant.
There is no issues with the source video. There is no issue in the preview in Vegas Pro 19.
Any ideas or suggestions on what could cause this?
That's a nice landing in the A320 Neo (MS Flight Simulator 2020) - I wish that I could do as well - sometimes even with a Cessna 172.
Three immediate considerations come to mind: 1/ what screen recording app have you used to record the MS FS 2020 screen play with?; 2/ you say that sync was fine on Vegas Pro 19's timeline, but was it in sync after rendering via Render As in VP19?, and; did the lapse in sync only occur after uploading the render to YouTube?
That's a nice landing in the A320 Neo (MS Flight Simulator 2020) - I wish that I could do as well - sometimes even with a Cessna 172.
Three immediate considerations come to mind: 1/ what screen recording app have you used to record the MS FS 2020 screen play with?; 2/ you say that sync was fine on Vegas Pro 19's timeline, but was it in sync after rendering via Render As in VP19?, and; did the lapse in sync only occur after uploading the render to YouTube?
Thank you very much :) I find it a lot easier to do a smooth landing in the A320 vs C172...
1) OBS
2) When I am in Vegas Pro and go to the same point in the timeline as where the rendered version has a delay, there is none. I also checked the raw material from OBS, which has not delay. I also checked the rendered file from Vegas vs Youtube and the rendered version has the delay, so that ofcourse is reflected on Youtube as well.
In other words, the delay seem to be happen during the actual rendering process.
There is no issues with the source video. There is no issue in the preview in Vegas Pro 19.
You don't know that, and neither will we, until we see your original and rendered file properties. Playing a video in a player gives absolutely no indication of stream or sync errors, which you obviously have.
There is no issues with the source video. There is no issue in the preview in Vegas Pro 19.
You don't know that, and neither will we, until we see your original and rendered file properties. Playing a video in a player gives absolutely no indication of stream or sync errors, which you obviously have.
Original:
General
Complete name : E:\Media\Video\HomeVideo\2021\09 - MSFS2020\Gibraltar(LXGB) to Lissabon(LPPT)- A32X ILS\Gibraltar(LXGB) to Lissabon(LPPT)- A32X ILS.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 3.88 GiB
Duration : 1 h 2 min
Overall bit rate : 8 836 kb/s
Writing application : Lavf58.29.100
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L5
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 : 1 h 2 min
Bit rate : 8 635 kb/s
Width : 1 920 pixels
Height : 1 200 pixels
Display aspect ratio : 16:10
Frame rate mode : Constant
Frame rate : 30.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.125
Stream size : 3.79 GiB (98%)
Writing library : x264 core 161 r3020 d198931
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=18 / lookahead_threads=6 / 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=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=10 / rc=crf / mbtree=1 / crf=16.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 1 h 2 min
Bit rate mode : Constant
Bit rate : 192 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 : 86.5 MiB (2%)
Title : simple_aac_recording
Default : Yes
Alternate group : 1
Rendered:
General
Complete name : E:\Media\Video\HomeVideo\2021\09 - MSFS2020\Gibraltar(LXGB) to Lissabon(LPPT)- A32X ILS\Gibraltar(LXGB) to Lissabon(LPPT)- A32X ILS_youtube_2nd render.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/mp42)
File size : 13.3 GiB
Duration : 39 min 56 s
Overall bit rate mode : Variable
Overall bit rate : 47.8 Mb/s
Encoded date : UTC 2021-10-23 10:08:18
Tagged date : UTC 2021-10-23 10:08:18
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L5.1
Format settings : CABAC / 1 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 1 frame
Format settings, GOP : M=1, N=30
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 39 min 56 s
Bit rate : 47.5 Mb/s
Width : 2 560 pixels
Height : 1 440 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 30.000 FPS
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.429
Stream size : 13.2 GiB (99%)
Language : English
Encoded date : UTC 2021-10-23 10:08:18
Tagged date : UTC 2021-10-23 10:08:18
Color range : Limited
Codec configuration box : avcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 39 min 56 s
Bit rate mode : Variable
Bit rate : 317 kb/s
Maximum bit rate : 400 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 : 90.7 MiB (1%)
Language : English
Encoded date : UTC 2021-10-23 10:08:18
Tagged date : UTC 2021-10-23 10:08:18
Is the delay present on all players?
Is the delay present on all players?
Tried 2 different players. Same result....
There is no issues with the source video. There is no issue in the preview in Vegas Pro 19.
You don't know that, and neither will we, until we see your original and rendered file properties. Playing a video in a player gives absolutely no indication of stream or sync errors, which you obviously have.
I have added the media info as suggested - any ideas on what issue could be? Other information I can provide which will aid in solving this?
Unfortunately, I don't have a resolution for the sync problem with MPEG, but I did have it happen around 10 years ago with HD MPEG-3 PAL 25 fps sourced via FTP transfer from a now long gone Topfield PVR to computer (personal use only). Progressively slipping audio sync on Vegas Pro's timeline was a problem every time - the longer the segment, the worse the sync slip became along the timeline.
Just a suggestion, perhaps transcoding the MPEG-4 to, say, MP4, via a transcoder like HandBrake might correct the issue. At the moment, I have no MPEG-3 or 4 media to check that.
Unfortunately, I don't have a resolution for the sync problem with MPEG, but I did have it happen around 10 years ago with HD MPEG-3 PAL 25 fps sourced via FTP transfer from a now long gone Topfield PVR to computer (personal use only). Progressively slipping audio sync on Vegas Pro's timeline was a problem every time - the longer the segment, the worse the sync slip became along the timeline.
Just a suggestion, perhaps transcoding the MPEG-4 to, say, MP4, via a transcoder like HandBrake might correct the issue. At the moment, I have no MPEG-3 or 4 media to check that.
I just tried to take the recorded file from OBS and put into a "clean" project.
Rendered with the same profile.
The result was NO audio delay. So for some reason that project file has issues.
I will re-create the project and render to see if there are issues
Okay, so I solved it, but dont know what caused it.
What I did was to create a new blank project, which matched the OSB media.
The I openend the old project, selected everything on the timeline and pasted it in the new blank project.
Just rendered it and the audio delay is not there!
Really strange, but I guess that project file had an issue.
Congratulations!
To make it easier on your system during OBS recording, try something like this:
Congratulations!
To make it easier on your system during OBS recording, try something like this:
Thanks, Ill have a look at those settings :) Generally my PC is doing pretty good on recording and playing games, but all help is appriciated!