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Audio lag


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9 replies to this topic

#1 JohnWJ

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Posted 03 November 2017 - 03:53 PM

G'Day everyone

 

I have a small problem that I do not know if it is the internal sound card problem or the Microphone. I have a Microsoft HD 3000 webcam and a Blue ice microphone when I have made a couple of videos I have noticed that there is a lag between the video and the sound. I will add a link to the video so you can see what I mean. Any help would be great

 

Thanks 

 

https://vid.me/JohnWJ


John

 

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#2 Chris Cosgrove

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Posted 03 November 2017 - 06:31 PM

You are right, there is definitely a lag in the 'talking head' videos, although much less in the longer, second one. I would look at the recording chain, the chain between the microphone and the recorded sound track. A lag of a few milliseconds would be virtually unnoticeable but it must at least half a second in the first tape. 

 

Oddly I didn't detect any in the warehouse shooting scene, and I tried to on the gunfire. What was different between them ?

 

Oh yes, your actors' first aid sucks !  Somebody goes to attend to the guy in the brown jacket and blue pants and just leaves him on his back. Have they never heard of the recovery position ?

 

Chris Cosgrove



#3 JohnWJ

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Posted 03 November 2017 - 06:42 PM

You are right, there is definitely a lag in the 'talking head' videos, although much less in the longer, second one. I would look at the recording chain, the chain between the microphone and the recorded sound track. A lag of a few milliseconds would be virtually unnoticeable but it must at least half a second in the first tape. 

 

Oddly I didn't detect any in the warehouse shooting scene, and I tried to on the gunfire. What was different between them ?

 

Oh yes, your actors' first aid sucks !  Somebody goes to attend to the guy in the brown jacket and blue pants and just leaves him on his back. Have they never heard of the recovery position ?

 

Chris Cosgrove

Thank you for you reply The warehouse one was videoed by someone else it was a training scenario . What do you mean by recording chain ? sorry I'm very new to this


John

 

An Australian Living in the USA


#4 Rocky Bennett

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Posted 03 November 2017 - 07:16 PM

 

You are right, there is definitely a lag in the 'talking head' videos, although much less in the longer, second one. I would look at the recording chain, the chain between the microphone and the recorded sound track. A lag of a few milliseconds would be virtually unnoticeable but it must at least half a second in the first tape. 

 

Oddly I didn't detect any in the warehouse shooting scene, and I tried to on the gunfire. What was different between them ?

 

Oh yes, your actors' first aid sucks !  Somebody goes to attend to the guy in the brown jacket and blue pants and just leaves him on his back. Have they never heard of the recovery position ?

 

Chris Cosgrove

Thank you for you reply The warehouse one was videoed by someone else it was a training scenario . What do you mean by recording chain ? sorry I'm very new to this

 

 

 

The recording chain includes all of the hardware and the software that is in the signal path from input to the target. You should be able to analyze the chain of events from both a physical and a data perspective in order to determine the source of the lag.


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#5 JohnWJ

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Posted 04 November 2017 - 02:05 PM

good morning my friends

 

the problem is a matter of ''settings'

 

the follow videoa will give you some answers since out of sync problems are too common with webcams, video cameras of any brad

 

 

 

a video review for your webcam

 

https://www.youtube.com/watch?v=Tzx_7MUaqug

 

https://www.youtube.com/watch?v=5a_sapgkZVs

 

microphone setup

 

https://www.youtube.com/watch?v=5a_sapgkZVs

 

https://www.youtube.com/watch?v=wm8pbtZhN3k

 

https://www.youtube.com/watch?v=T1l_9Czjj7Y

 

https://www.youtube.com/watch?v=i_Lj9PImC4M

 

audio / video out of sync problems can be fixed under post production with a video editor

 

https://www.youtube.com/watch?v=5aeuy6MrbHY

 

https://www.youtube.com/watch?v=1PiN9Zgt_Kg

 

https://www.youtube.com/watch?v=v3LPs6eh2E0

 

 

try also to adjust some settings under your microphone settings as well and use only cbr video recording (constant video bit rate), try some lower video resolution (720p), windows media possible will work better than .mp4, audio better to be as mp3 up to 256 kbps cbr (constant audio bit rate) not variable

 

good luck

Awesome Thank you


John

 

An Australian Living in the USA


#6 Chris Cosgrove

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Posted 04 November 2017 - 06:36 PM

Can I remind the posters in this thread that it is seldom necessary to quote replies to posts in full since posts in topics on BC, with rare exceptions, are going to stay there until the heat death of the Universe, or at least for the life of the forum.

 

By all means use quotes to highlight one particular point you wish to address, but this does not usually require quoting the complete post.

 

Chris Cosgrove



#7 JohnWJ

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Posted 04 November 2017 - 07:15 PM

sorry


John

 

An Australian Living in the USA


#8 Rocky Bennett

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Posted 05 November 2017 - 10:42 AM

Chris, I am very curious as to which will happen first, the heat death of the Universe or the life of the forum?

 

Rocky


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#9 Chris Cosgrove

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Posted 05 November 2017 - 06:48 PM

Probably the Heat Death of the Universe since more quoting = more bandwidth = more entropy !

 

But my point is serious in that it makes threads harder to follow.

 

Chris Cosgrove



#10 JohnWJ

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Posted 05 November 2017 - 06:53 PM

Again sorry


John

 

An Australian Living in the USA





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