Noise at the end of a clip

Comments

john_dennis wrote on 9/5/2023, 2:57 PM

This describes a failure that is repeatable on my machine running Vegas Pro 21-108.

Executive Summary

A timeline full of full HD .mp4 files exhibits no sound abnormalities. When the same content rendered to pixel dimensions different from the project pixel dimensions is added to the timeline, the noise starts and affects all events on the timeline.

If you would like to try on your hardware, the source files can be downloaded from here:

https://drive.google.com/file/d/1UrGAAy8Nix9SOg3qfdkMh_9P_7ybH7Wk/view?usp=sharing

These files were rendered from Vegas Pro 14-270 using the default templates.

@VEGASDerek @Former user @Phil_P @shovel @rraud

john_dennis wrote on 9/5/2023, 4:44 PM

Executive Summary 2

The converse is also true.

A timeline full of UHD .mp4 files exhibits no sound abnormalities. When the same content rendered to pixel dimensions different from the project pixel dimensions is added to the timeline, the noise starts and affects all events on the timeline.

Former user wrote on 9/5/2023, 4:52 PM

@john_dennis Voodoo & Serano - Blood Is Pumping 👍

john_dennis wrote on 9/5/2023, 5:11 PM

"Oh, one more thing." said Colombo to the suspect as he flicked his ashes on the priceless carpet.

Executive Summary 3

XAVC-S has an MP4 extension, too.

This is a BFD, folks.

Phil_P wrote on 9/6/2023, 12:45 AM

Nice Videos John.
 

I have a feeling we may be on a different issue here. (I'm really sorry, pushed for time right now but can go into far more detail later on if it is of any use).

So basically, what I see is this. Every clip that I pull into Vegas has an extra little bit of the audio (in my case the dialogue track and main sum track at the end.)

[For ref I use OBS and record to 5 audio tracks. 1 is the full mix (used for streaming), 2 is dialogue only, 3 is audio / music, 4 is effects and stings, 5 is a bleep I set as marker ref.]

My procedure is to record at 4K (more details if required). Vegas project is set to exactly what my recorded files are.

As soon as I drag the recorded clips into Vegas (no stretching or moving just dragging them into a project), I see (and hear) this at the end of every clip. I double check the raw file and it does not exist in the file itself. Only when in Vegas. So, I don't need to do any rendering to see this issue.

What I do need to do is to take the time to figure out exactly what that little piece of audio is, it is not "recorded", but where it is coming from - it some part of the clip itself - (it is 100% not that I was still talking while stopping the recording). Then try some other settings in OBS too and see if I can figure it out. I realise that this is not really helpful until I have done that.

 

nb. Big Columbo fan here.


bitman wrote on 9/6/2023, 2:26 AM

Please fix this asap, this noise issue is around for far to long; I can understand if it is hard to fix if it is hard to reproduce, but @john_dennis has given fine examples on how to. The added "farting" noise at the end is really not professional and degrades the Vegas product. Can we not get a hotfix for this?

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VEGASDerek wrote on 9/6/2023, 5:43 AM

We are working on it. We have been able to reproduce the problem for some time, but the fix for this has eluded us.

john_dennis wrote on 9/6/2023, 8:15 AM

@Phil_P I record to Apple ProRes in OBS, though I rarely let anyone hear my voice anymore. So far, I haven't run out of disk space.

JMacSTL wrote on 11/14/2023, 2:59 PM

 

What I do need to do is to take the time to figure out exactly what that little piece of audio is, it is not "recorded", but where it is coming from - it some part of the clip itself - (it is 100% not that I was still talking while stopping the recording). Then try some other settings in OBS too and see if I can figure it out. I realise that this is not really helpful until I have done that.

@Phil_P

I too have tried to figure out where that burst of sound is coming from. Sometimes it feels like it's the first 2 frames of the file trying to start over. Other times, it changes to a full volume (0 db digital) burst of noise that's just awful. Especially for a VO talent in the booth trying to read against picture. Recently I did another of a sometimes typical session whereby I'll drag up to 20 video files of various flavours onto my timeline. Some are 29.97 some are 23.976. All are .MP4 or .MOV, and all are 1920x1080. The audio is mostly AAC w/ a bitrate of 320kb/s and all 48khz.

If, say, I have a session frame rate set at 29.97 and I drag a 23.976 file onto it, it may or may not ask me if I want to set the session frame rate to the new file (depending on if I have a file already there). If I choose 'no', then I've got a 23.976fps file playing on a 29.97fps timeline. I've been doing this literally for a dozen years or more with no huge issues (sometimes rough video, but that's to be expected). If I then change my session rate to match the new video file, that burst of full spectrum awful noise may turn back to just a quick audio blip, which again sounds like the audio file trying to start over. imagine you've 'unscrubbed' the audio track at the end of the file by 2 frames and you now play through the end, you'll hear the first 2 frames of audio quickly play.

I wonder if this is an audio soundcard issue. (I've got two systems. one with MOTU ASIO drivers and another with Focusrite ASIO drivers. The issue occurs on both systems).

I"m going to use Mediainfo to look closely at a variety of video files and see if there's any logic to this. Stand by......jmm in STLouis

jmm in stl

Windows10 with Vegas 11 Pro (most recent build). Intel Core i7-3770 @ 3.40GHz 3.90 GHz, 32GB ram, separate audio and video disks. Also Vegas 17 Pro on same system. GPU: NVDIA GeForce RTX 2060 SUPER. Dynamic RAM preview=OFF.

john_dennis wrote on 11/14/2023, 6:32 PM

@JMacSTL @Phil_P

I tested this in one of the other threads and that version was fixed in Vegas Pro 21-187.

https://www.vegascreativesoftware.info/us/forum/super-loud-blip-sound-on-clip-start-end-on-occasion--141617/?page=2#ca896719

I'm looking for a round tuit to check the XAVC version scenario that I presented earlier.

JMacSTL wrote on 11/14/2023, 6:43 PM

@john_dennis Thx John. I"m not sure what you did in the video you posted. Were you re rendering the video? If so that's not a solution for me really b/c when a client says "here, download these 20 videos and drop them in your timeline and let's get going!" there's no time to re render. I'm on Vegas20 b.411(?) (most recent). If they fix this only on v21 and not 20 I'll be a bit upset. I shouldn't have to pay for an upgrade just to fix something that should not be broken, right? Don't get me wrong: I have been using Vegas since 2002 or 2003 and have upgraded all the way to v20, and still love it mostly. I'm glad Magix has kept it goin!

jmm in stl

Windows10 with Vegas 11 Pro (most recent build). Intel Core i7-3770 @ 3.40GHz 3.90 GHz, 32GB ram, separate audio and video disks. Also Vegas 17 Pro on same system. GPU: NVDIA GeForce RTX 2060 SUPER. Dynamic RAM preview=OFF.

john_dennis wrote on 11/14/2023, 6:53 PM

I wasn't re-encoding the video for any of the camera files that I use that experienced the noise. The one example of using Shutter Encoder was to clean up Tik Tok video in this example.

https://www.vegascreativesoftware.info/us/forum/noise-at-the-end-of-a-clip--140457/#ca884625

I only have 21-187 on my machine. I'm out of the business of looking back. (I'm not able to look very far forward, either.)