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Audio Out Of Sync The More It Plays
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insaneuk
Junior Member
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10. March 2008 @ 01:29 |
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had a quick look round on here but nothing really helps me :(
to cut a long story short i have 2 films.
A = Good Video but crap sound
B = Crap Video but good sound
both were in iso format so mounted and loaded into dvd dycrypter.
ripped video off one and audio off the other both using demux and no file splitting.
loaded both files into dvd lab pro and created a dvd so to speak.
when i play the files it starts off in sync but goes out of sync quite quick. i can load the file into mediaplayer classis adjust the time delay and get one bit spot on then a few seconds later it's out again.
now the films the same so i know the audio SHOULD be right video track i think is about 3 seconds longer but even so people should be talking at the same time
having checked back i noticed that the audio is about 3 seconds longer than the movie file so i am goin to cut this down to the same length then try again but even so surly this would not make as much impact as i'm getting.about 1 min in it's like 8 seconds out or so!!!!
any help, advice or links to any sites giving info would be great.
cheers
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AfterDawn Addict
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10. March 2008 @ 09:22 |
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Suba
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10. March 2008 @ 09:46 |
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If your audio has constant delay all the way through the movie than what attar suggest will work. If, however, audio is getting progressively out of sync, than only way to fix it is to stretch it(slow down) or shorten it(speed up) using audio editing software like Audacity, Sound Forge or other. This is lots of work.
Cutting 3 seconds out will not do anything, only cut last part of the audio off.
3 seconds is a big difference, you will see it as people speak and sound come early or late.
Check your original files in GSpot if they are exactly the same.
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insaneuk
Junior Member
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10. March 2008 @ 11:27 |
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yeah it seems to be getting worse as the film goes on kinda thing.
i'll have a look in that gspot thing and see what it says about the files
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insaneuk
Junior Member
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10. March 2008 @ 11:49 |
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loaded both file up in gspot what should i be looking for as it just loads them on the left and says ac3 48khz etc but thats about it realy
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Suba
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10. March 2008 @ 18:21 |
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On the right hand side there are information about video, like Pics/s, Frames/s, Feelds/s. Are they the same on both files?
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insaneuk
Junior Member
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10. March 2008 @ 22:27 |
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there empty mate, i've got the audio as a single file that has been
ripped from the dvd not a divx or avi etc.
can you load in vob files etc i'll go and have a look now see what it says, if not will i have to rip the movie to a mpg or avi and then look at them
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insaneuk
Junior Member
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10. March 2008 @ 23:07 |
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right i've loaded the vob file up and there are some differences in the files but i aint sure what the things are or that, took a pic of both screens but i locked myself out of photobucket so cant upload the pic at the min :S
but i'm loading ro different vob's so that could be the reason
the things that are different are
in the T section so to speak
good sound film good picture film
len 23:27:240 18:35:080
frms 35.181 27,887
kbps 5786 7001
qf 0.558 0.675
everything else thou is the same d section is the same
also noticed that the audio is the same on both on the left apart from the kbs
good sound film 0xbd[0x80]:48000Hz 192 kb/s tot , stereo (2/0)
good pic film 0xbd[0x80]:48000Hz 384 kb/s tot , stereo (2/0)
i'll try and get the pic uploaded but whats ya thoughts
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Suba
Member
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11. March 2008 @ 09:22 |
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Originally posted by insaneuk:
good sound film good picture film
len 23:27:240 18:35:080
frms 35.181 27,887
kbps 5786 7001
qf 0.558 0.675
If this is whole picture than look at time, there is 5 minutes different in running time.
That would explain why your audio is getting out of sync when movie play.
Audio 192kbs and 384kbs is just quality and file size, does not affect the length.
This message has been edited since posting. Last time this message was edited on 11. March 2008 @ 09:34
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insaneuk
Junior Member
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11. March 2008 @ 20:52 |
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no mate thats just the vob file that i did so it would be showing the running time for that file not the whole thing.
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insaneuk
Junior Member
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11. March 2008 @ 21:11 |
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hmm something interesting i just seen. i put both the ripped movies into womble editing thing and played them both at the same time, one in each. the good picture one seemed to play quicker than the other so it would seem that even thou there both 25 fps when ripped there is something in the good picture thats whay the audio is getting out of sync the video is playing quicker than the sound. even thou i think i said the sound was quicker i could be wrong and it's other way round :S my bad
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Suba
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11. March 2008 @ 23:02 |
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Ok. The way you wrote last post it looks like they are not the same. One could be cut version.
The best would be to convert them to mpeg file and load those into DVD Lab. It will demux it and than you can see if files match in length.
If that is the case you can always take movie from one and sound from other to make new DVD, but I doubt this is the case.
If they are both at 25 fps they should have the same length unless one is cut version of other.
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insaneuk
Junior Member
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11. March 2008 @ 23:14 |
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i played them side by side and they have the same video it just seems that the better picture one ran quicker for some reason, say for example one was 25fps the other was 27fps but they both have the same amount of frames there for the other one would go quicker if that makes sense.
from just lookin at what i have found out i need to some how say that the films is 27fps and then convert it back down to 25.. does that make sense at all, it does in my head lol
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Suba
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12. March 2008 @ 11:46 |
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It sounds logical, but it is not the way it is. It all has to do with length of the video to match.
Why I say that, because when I convert PAL 25fps to NTSC 29.97fps, I usualy demux audio from PAL and convert video to NTSC, than in DVD lab put it all back together and never ran into sync problem.
I ran into this only once and ended up running audio and video in TMPGEnc Plus to convert to DVD compliant Mpeg file, than it was OK, it was cartoon.
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insaneuk
Junior Member
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13. March 2008 @ 12:43 |
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any suggestions then when i watch them both side by side one seems to run quicker than the other even thou there exactly the same film with sme sceens cant see anything missing
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Suba
Member
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13. March 2008 @ 13:22 |
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It is possible that the movie was sped up. I do not know how it is done, but check this post where the guy is talking about it. May be if you post your question there he can help.
Changing frame rate will just introduce more frames/s, but will not speed up the movie.
http://forums.afterdawn.com/thread_view.cfm/637407
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insaneuk
Junior Member
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13. March 2008 @ 16:16 |
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cheers i'll have a look and read on that.
just to put things hopefully a bit clearer i've just done the following
got both iso files and ripped the film form both
i then loaded each one into woble dvd and cut the film at the beging at the same part and at the end at the same part.
load them into media player one is 1:24:59 and the other is 1:21:37 so one MUST be shorter i thought
watch them both at the same time same film nothing missing at all audi is in sync for both of them watch for 3 mins or so and then paused the film at the same point in each film and there out already.
looked for a set point and then looked at times
1:21 film was on 1:58:00 seconds
1:24 film was on 2:03:08 seconds so within about a 2 min it was 5 seconds out!!!
so working on average:=
film is about 85 mins long so dived that by 2 gives you 42.5x2min sections.
times 42.5 x 5 = 212.5 which means film is addings 200 seconds on the film ish.
dived 200 into 60 for mins and you get 3.54 etc so thats about 3.5 mins which makes the differenc up
so there we go i think, the film with good picture is running at approx 1.04 times quicker. not much that when you watch it you notice but enough to throw the sound out!!!
does all that make sense lol
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insaneuk
Junior Member
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13. March 2008 @ 16:29 |
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hmm heres a thought if the frame rate is 23.97 dived the 25fps by 23.97 and you get 1.04ish
so for every second you loose 1 frame so each min you loose around frame so over a min you would loose 60odd frames. so at 25fps thats around 2.5 seconds aint it, does that make sense
so in theory if the film was set at 23.9fps but was being told to play at 25 fps this would speed it up yeah?? to about the rate that the problem is
so what i need is some way of telling the video that it's 23.9 fps and not 25 then when it plays it should play at the right length correct???
or convert it to 25fps even thou it already thinks it is :S
This message has been edited since posting. Last time this message was edited on 13. March 2008 @ 16:39
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Suba
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13. March 2008 @ 17:25 |
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Originally posted by insaneuk:
so in theory if the film was set at 23.9fps but was being told to play at 25 fps this would speed it up yeah?? to about the rate that the problem is
so what i need is some way of telling the video that it's 23.9 fps and not 25 then when it plays it should play at the right length correct???
or convert it to 25fps even thou it already thinks it is :S
Yes this is sound reason and it would be exactly the way to speed up or slow down the movie.
There is a Virtualdub software (free) where in video tab is a function to sync video and audio. I newer used it , but you can try.
http://www.videohelp.com/tools/Virtualdub
Further to your reason:
I would convert it back to 23.97, than it should become original video.
This message has been edited since posting. Last time this message was edited on 13. March 2008 @ 17:29
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insaneuk
Junior Member
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13. March 2008 @ 18:03 |
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i'll have a look now.
i'm just tryin to get my head around what needs converting and which doesn;t at the min lol
the film thats shortest needs to be told to play at 23.9 but when i convert it still out it seems, guess i'm just fighting a loosing battle lol
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insaneuk
Junior Member
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13. March 2008 @ 20:02 |
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we might be on to something lol
i got the 2 different files, the good audio and the good pic form the cropped files and put them into womble and converted to avi (dub wont look at mpeg files) and had a look at the frome rate thing. i set frame rate to 24 for video and ..... it seems to be in sync.
so i'm converting the whole thing now then i will have to convert it in dub, then convert the avi back to mpeg lol and then into dvd pro. right long way round but seeing as i have the file now already cropped and cut be just as quick as starting from scrath i guess
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insaneuk
Junior Member
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14. March 2008 @ 07:14 |
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right i'm giving up lol
it looks like along the way one of the films has been encoded just crap lol
i created the avi with the good audio and good video from the cropped files and then loaded them in to virtualdub.
messed with the settings on frame rate and got the begining spot on, but thouhg best near end as thats when it will go most out. after a bit of messing found out that the video needs to be at 24.0051fps to get it in sync at the end, sweet i thought. skipped thru the film amd guess what it aint in sync in the middle bit i tried. so i guessing when it was encoding some one did a hash job so no matter what happens i just aint goin to get it to work :(
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Suba
Member
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14. March 2008 @ 08:35 |
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Sorry to hear.
May be better luck next time.
I did not think it will be that easy.
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insaneuk
Junior Member
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14. March 2008 @ 08:38 |
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lol yeah
from all the stuff i have i can get stuff working spot on in sync delayed cropped etc etc. it's just the getting it in time all the way thru with it being ripped by a monkey it would seem on a tomy speak and spell lol
thanks a lot thou for all ya help learnt a few things that will help in the future anyway :D
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