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View Full Version : a/v delay: smartripper vs. dvd2avi


chi
6th January 2002, 15:58
follwoing prob:

when ripping the dvd, sr tells me that there is no av delay. when extracting the ac3-streams from the vobs using dvd2avi, it tells me that there is a delay... i experienced this with several movies now... any ideas? whom can i trust?

MaTTeR
6th January 2002, 18:12
What version of SmartRipper are you using? SR2.41 is the latest version AFAIK.

If DVD2AVI saves the file out with a delay in the filename then use it.

chi
6th January 2002, 18:47
hi matter,

yes, i'm using sr2.41. delay is just about -111ms so i don't think it matters at all. just wanted to know if anyone else kows about that...

Doom9
6th January 2002, 19:42
I'd go by what dvd2avi tells you.. never had any problems with it so far.

and a delay of -110ms can be heard.. the limit is somewhere around 50/60ms

MaTTeR
6th January 2002, 20:02
I agree with Doom9, you will see the delay if you dont use it.

chi
6th January 2002, 20:03
is there another (maybe standalone) tool which can tell me the delay?

MaTTeR
6th January 2002, 20:17
Perhaps Vstrip or DVDecrypter 3.0.08 might.

Doom9
6th January 2002, 20:49
vstrip will tell you.. never used it though so I can't say if it's accurate

DSPguru
6th January 2002, 21:22
Originally posted by MaTTeR
I agree with Doom9, you will see the delay if you dont use it. and now, a more philosophical question :
would you more see the delay, or hear the delay :confused: ?

Rumata
6th January 2002, 23:35
To DSPguru:
I want to use your BeSweet to convert sound directly from VOBs to MP3. Before that I used to extract AC3 file with DVD2AVI and then convert it to MP3 with BeSweet. The question is how will I know wheather there is a delay and how big is it with this VOBs->MP3 approach ?

Thank's in advance.

Amerzone
6th January 2002, 23:44
BeSweet has nothing to do with the AV delay. You have to enter this value in NanDub when you are muxing the video with the audio (Audio > Interleaving... > Audio skew correction). Personally, I cannot care less about that setting (always use the default 0 ms), since I can never notice any difference (mp3 is CBR, don't know if this is true for VBR, too).

Rumata
7th January 2002, 07:23
Originally posted by Amerzone
BeSweet has nothing to do with the AV delay. You have to enter this value in NanDub when you are muxing the video with the audio (Audio > Interleaving... > Audio skew correction). Personally, I cannot care less about that setting (always use the default 0 ms), since I can never notice any difference (mp3 is CBR, don't know if this is true for VBR, too).

I know delay has nothing to do with BeSweet. And it CAN be significant. So I think it's important to know it. I want my rips to be perfect.

chi
7th January 2002, 09:11
@dspguru

hell, that's a question... let' get it on...
i think it's more an amalgamation of seeing, hearing AND believing. btw. let's imagine that some persons personal 'audio processing' (->hearing) is much slower than their 'video processing'(->seeing), which would result in a 'everything out of synch'. this would give you problems, i mean try to give your girlfriend a delay... ;-7

DSPguru
7th January 2002, 09:29
@Rumata
in future versions of BeSweet i will be using vStrip instead of bbDMUX, and would be able to extract the delay.

btw, anyone tried to worked with the new switch ?-ota( -d delay )

@chi
maybe a new feature should be added to dvd-players : "set your personal A/V delay" ;)

chi
7th January 2002, 12:05
@dspguru

i tried ota delay yesterday, it's ok think (didn't test very well, bacause i have terrible probs creating bivx with nandub...)
btw. i converted vob-list to mp3 and experienced that the output from 1st vob has been very very silent compared to the other vob output... i can give you the cmd this evening...

damjang
7th January 2002, 13:14
Originally posted by DSPguru
btw, anyone tried to worked with the new switch ?-ota( -d delay )


What efectively do this delay comand? Trim a peace of audio if the value is negative and add silent blocks at the beginning if the value is positive? (and the same at the end?)

damjang

Mozart
7th January 2002, 16:12
and now, a more philosophical question :
would you more see the delay, or hear the delay ?

I guess this is not just philosophical. This is mainly a classical question about reference frame (RF), in the Physics point of view. Both, sound and light (image), have constant speed, being just a question of choice what of those you will use as RF. If your RF is the image, you can hear the delay/ahead of. If the RF is the sound, you can see the ahead of/delay. :cool:

@chi,

Nobody with a healthy brain (->decoder) has a Personal A/V delay. However, if you are 40 meters far from the speakerphone, you can hear a delay of almost 120ms even if the movie have no async.:D

chi
7th January 2002, 16:44
@mozart
Nobody with a healthy brain (->decoder) has a Personal A/V delay.
talking about healthy brains: according to your theory, i think only the minority of man has NO a/v-delay. this must be the reason why there are so many threads about sync issues and this would also explain why politicians never seem to get anything in sync. hell, they must have heavy a/v-delay problems!! ;-7

Mozart
7th January 2002, 16:53
ohhh. You are right. Guess I should say "healthy PRIMITIVE brain", just because those functions are older, in evolutive scale of time, than these others usualy corrupted. Thus, they are more safe. As a usual rule for brain evolution: older functions - like sexual desire, equilibrium, hearing... - are strongger than new ones - ethics, etc. lol.;)

chi
7th January 2002, 17:06
mhhhh...
let's imagine a prehistoric, dvd-ripping society...that would would be great. no posts about delayed audio, flask issues, over-/undersized avi's or worries about copyright violations. the only problem would be sneak-attacking sabre-tooth-tigers... ;-7

Mozart
7th January 2002, 17:23
I think I might have gotten mixed up somewhere... When you talk about Personal A/V delay, aren't you talking about hearing/seeing delay(question). If yes, my statement about healthy brain is correct. It is really hard to believe that when you are talking with another person, in 3D real world, you can see/hear a delay. If you can, it is the time to search a doctor... :cool:

chi
7th January 2002, 18:13
mhh mozart, don't worry that's just normal brain damage caused by the philosophical, hypothetical nonsense included in my last 4 posts, which have absolutely nothing to do with the real world. actually, i don't believe there IS personal a/v-delay. (except for politicians, of course)... ;-)

ThePanda
13th January 2002, 08:09
How do I get vstrip to tell me the delay? Smartripper and dvd2avi both tell me 0ms, but it's clear that it's off by like 2 seconds!