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Old 6th January 2002, 15:58   #1  |  Link
chi
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a/v delay: smartripper vs. dvd2avi

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?
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Old 6th January 2002, 18:12   #2  |  Link
MaTTeR
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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.
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Old 6th January 2002, 18:47   #3  |  Link
chi
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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...
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Old 6th January 2002, 19:42   #4  |  Link
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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
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Old 6th January 2002, 20:02   #5  |  Link
MaTTeR
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I agree with Doom9, you will see the delay if you dont use it.
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Old 6th January 2002, 20:03   #6  |  Link
chi
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is there another (maybe standalone) tool which can tell me the delay?
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Old 6th January 2002, 20:17   #7  |  Link
MaTTeR
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Perhaps Vstrip or DVDecrypter 3.0.08 might.
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Old 6th January 2002, 20:49   #8  |  Link
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vstrip will tell you.. never used it though so I can't say if it's accurate
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Old 6th January 2002, 21:22   #9  |  Link
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Re:

Quote:
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 ?
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Old 6th January 2002, 23:35   #10  |  Link
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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.
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Old 6th January 2002, 23:44   #11  |  Link
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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).
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Old 7th January 2002, 07:23   #12  |  Link
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Re:

Quote:
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.
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Old 7th January 2002, 09:11   #13  |  Link
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@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
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Old 7th January 2002, 09:29   #14  |  Link
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@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 ?
Code:
-ota( -d delay )
@chi
maybe a new feature should be added to dvd-players : "set your personal A/V delay"
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Old 7th January 2002, 12:05   #15  |  Link
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@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...
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Old 7th January 2002, 13:14   #16  |  Link
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Re:

Quote:
Originally posted by DSPguru
btw, anyone tried to worked with the new switch ?
Code:
-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?)

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Old 7th January 2002, 16:12   #17  |  Link
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Quote:
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.

@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.

Last edited by Mozart; 7th January 2002 at 16:15.
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Old 7th January 2002, 16:44   #18  |  Link
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@mozart
Quote:
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
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Old 7th January 2002, 16:53   #19  |  Link
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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.

Last edited by Mozart; 7th January 2002 at 17:04.
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Old 7th January 2002, 17:06   #20  |  Link
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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
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