Audio bad on rendered video

Patrick Kox wrote on 6/16/2014, 2:10 PM
Hi,

I'm new so I'm hoping I'm posting this in the correct section.

I've recorded a clip with my Sony Handicam (AVCHD, the highest resolution (FX I think it's called) in 50i)

I've imported the video in Vegas, Removed the audio track and imported a new track recorded with my D.A.W. (ACID 7 Pro) And added some FX. (like Chroma Key, fading, titles, ...)

Now when I render the file and upload it to youtube the sound is dropped so the clip sounds kinda bad.

Is there something that I'm doing wrong ? or is there something I can do to solve this problem ?

You can see the video here :

Thanks
Patrick

Comments

dxdy wrote on 6/16/2014, 2:30 PM
Does the rendered file played on your computer have the same dropouts?

Rob Franks wrote on 6/16/2014, 7:18 PM
It sounds like clipping being muted by a compressor. If the sound is clipping badly and you have a compressor set for a high attack and slow return rates you'll get what sounds like drop outs.
Patrick Kox wrote on 6/17/2014, 10:00 AM
dxdy,

Yes the rendered file has the same problem.

The weird thing is that I made another video with different background images and without the fading and that file plays perfectly.

I just opened the "original" project in Vegas as while the file I rendered has no problem with the audio the playback in Vegas has the same dropping as the one I posted to YouTube.

I don't know if this helps but here's some information on my setup :

CPU : Intel Core i5-2310 @ 2.90 GHZ (2nd generation iCore)
RAM : 6 GB
O/S : Windows 7 64-bit (set to max performance so no visual extra's)
Virtual Memory : Set to a fix size (set to the recomended 9189 MB)
Vegas : Vegas 13 64-bit (full license)
ACID 7 Pro (full license)

I've got a minimum of other programs running and Windows is fully up-to-date and it's all legal so no cracks or anything installed (BitDefender Total Security is running since this system is connected to the internet).

Incase removing BitDefender is a working option I can always disconnect the system from the internet and upload the files from my laptop.

The output profile is : XAVC S HD 1080 Long-GOP 59.94p

I don't know if this is a good output format (I'm not that experienced with video) so maybe I just need to use a "better" output format ?

Oh, and the input file is set to :
REC Mode : Highest Quality (FX)
Frame Rate : 50i
HD/MP4/STD Setting : HD Quality
Wide Mode
x.v.Color : ON
Image Size : 19:9 (8.9M)

This is what the LCD from the camera shows.

Patrick
Patrick Kox wrote on 6/17/2014, 10:02 AM
Rob Franks,

I'm not using any compressor (that I know of).
I checked the file (used the open file in SoundForge option in Vegas to check and the file plays perfectly in SF (I did use SF to "normalize" the audio because it was too low).

Tnx
Patrick
rraud wrote on 6/17/2014, 10:10 AM
Make sure there are no audio plug-ins running. On older versions of VP, compression, gating, and another plug were added by default. Fortunately the plug-in default could be changed.
Don't know about VP 11,12,13.
Patrick Kox wrote on 6/17/2014, 10:46 AM
rraud,

You are correct !
I checked the Track FX and there are 3 plugins set :
- Track Noise Gate
- Track EQ
- Track Compressor

removing the check-mark on the "Compressor" didn't help it turned out to be the "Noise Gate" that caused the problem.

Thank you !

now I just need to have a good look into the settings of VP and see where I can disable this by default.

Oh, something else. I tried to output as XDCAM EX (MP4) and I've checked the profile (audio is set) but when I render to this format there is NO audio only video.

Anyway,
Thanks again !

Patrick Kox

P.S.
For those who are interested, here is a video with the sound working well :