Quantcast DVD2AVI: Delay 29ms - digitalFAQ.com Forums [Archives]
  #1  
02-19-2003, 04:40 PM
Bchteam Bchteam is offline
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Hi Guys!!!

I created a d2v Project with DVD2AVI and I was wondering because of the name the AC3 File had.

Blade2Project AC3 T02 3_2ch 448Kbps DELAY 29ms.ac3

Does this "DELAY 29ms" mean that the Audio stream has a Delay of 29ms???

If yes,how can I solve this???
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  #2  
02-19-2003, 05:17 PM
kwag kwag is offline
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Hi Bchteam,

Yes it means the audio has that delay in reference to the video when it was extracted.
If you encode your AC3 file with HeadAC3he, it will take into consideration the delay and encode your output .MP2 file automatically with the correction

-kwag
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  #3  
02-19-2003, 05:33 PM
Bchteam Bchteam is offline
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That means that I don't have to adjust the Delay Value in HeadAc3e at all...
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  #4  
07-27-2004, 05:28 AM
Dam0 Dam0 is offline
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i too have same issue.

but i master with 5.1 so i need the ac3 intact. is there any way to add the -ms time into the ac3 file ?

regards,
Dam0
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  #5  
07-27-2004, 06:08 AM
Prodater64 Prodater64 is offline
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Quote:
Originally Posted by Dam0
i too have same issue.

but i master with 5.1 so i need the ac3 intact. is there any way to add the -ms time into the ac3 file ?

regards,
Dam0
AC3 still has the DELAY. Info in its name is for you, if you want to transcode to mp2, Headac3he take itself de delay from name, Besweet you have to put it by hand. Bun if you don't make anything with your ac3, the delay remain in it.
DVD Authoring Programs, will take in account de Delay also.
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  #6  
07-27-2004, 06:22 AM
incredible incredible is offline
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If you want to keep the AC3 as it is without reencoding you can also use AC3delayCorrector for authoring an individual DVD-R afterwards.
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  #7  
07-27-2004, 06:32 AM
Dam0 Dam0 is offline
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sorry now im really confused ??

do i need to change the ac3 file to be in sync ?

im using dvdmaestro to master.

Dam0
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  #8  
07-27-2004, 06:43 AM
incredible incredible is offline
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Logically yes!
As the muxing Audio delay/offset in the original VOB wont be included as header-value in the separated AC3.
When demuxing the VOB you will have the m2v and the ac3 ... and the Delay information will be lost, thats why DVD2AVI puts a comment into the AC3s Filename after demuxing the ac3 and generating the d2v.

If I do keep the AC3s of my originals, I do everytime use that DelayCorrection when doing the authoring with MaestroDVD afterwards
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  #9  
07-27-2004, 06:58 AM
Dam0 Dam0 is offline
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great answer.

thanks

just to take it a step further....

if i re-encode the ac3 with bsweet gui, can i add\subtract the delay in that tool.?

i think the delay option is for creating other formats ??

Dam0
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  #10  
07-27-2004, 07:54 AM
incredible incredible is offline
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Quote:
Originally Posted by Dam0
if i re-encode the ac3 with bsweet gui, can i add\subtract the delay in that tool.?

i think the delay option is for creating other formats ??

Dam0
Nope you also can use that when reencoding to ac3 again.
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  #11  
07-27-2004, 08:28 AM
Dam0 Dam0 is offline
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great thanks, ill try that method cause ive been downsampling the ac3 to get better quality on video.

Dam0
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  #12  
07-27-2004, 08:38 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by Dam0
great thanks, ill try that method cause ive been downsampling the ac3 to get better quality on video.
If you are doing ac3->ac3 then try AC3Machine insteed of besweetGui.

This is an alternate GUI for besweet.exe that is aimed to ac3 files only. A lot easier to use.
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  #13  
07-29-2004, 05:48 AM
Dam0 Dam0 is offline
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ok thanks for the tip on using ac3machine, ill try that next time.

i tried encoding with bsweet gui and it gave me a few db less gain, and everytime i tried to eliminate the problem it kept resulting in lower gain(volume) ac3s, this wouldnt normally be a problem, but with 3 x movies on same dvd, you do notice a huge diff in volume.

anyhow, i used ac3corrector and it worked out great. and was way faster then bsweet was too. ac3corrector even read the delay setting from the ac3 filename. very cool.

well thanks for your help guys.

Dam0
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  #14  
07-29-2004, 06:09 AM
incredible incredible is offline
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Quote:
but with 3 x movies on same dvd, you do notice a huge diff in volume.
Volume stands in no relation with bitrates and therefore space needed to put a number of X movies to one DVD-R.
The volume bug is a fault of ac3enc.dll which is used by BeSweet or Ac3Machine and lays on a codec based on ffmpeg and not DSPGuru.

So to obtain the Volume do add -azid (-g max) or similair and thats a point you CANT do when using AC3 machine cause all other Gain Controll commands do fail! So Besweet is the right choice when at least keeping AC3 volumes.
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