Audacity Stretch and Shrink problem

[Querd]

Hello, first of all excuse me for my bad English, i hope i ll be understandable..

Well straight to my problem so you guys can know what is up, i recently downloaded an 720p [its animation] and it happens that i have my greek DVD audio witch is of-course smaller in length than the 720p movie. So in order to match those two together WITHOUT loosing quality i had to edit my audio [movie is .mkv] so i've tried to stretch it from 1:26:42 to 1:30:24 witch is about 4680,88 seconds, first in Audacity CTRL+A selecting all the audio and then Effect>Change Tempo.. i typed 4680,88 but instead Stretch i got shrink!

anyway that's my problem, thanks in advance.

[manono]

i've tried to stretch it from 1:26:42 to 1:30:24 witch is about 4680,88 seconds...

Do your math over again.

[Querd]

after doing it many times, the audio quality is ruined

[manono]

Did you figure out the correct number of seconds to stretch it yet? If you don't know simple multiplication and addition you shouldn't be doing video work.

[johns0]

The value you want is 5424 seconds,give or take a few milliseconds.

[Querd]

After some tries i realized what i was doing wrong, and found out johns0 was right ^^ thanks a lot. now i got another problem. even so my audio is correct when i mux them together i loose my audio progressively. So i used avc2avi to make my .mkv to .avi without loosing quality. is there any way on how i could fix this problem using VirtualDub or anything that does the job? thanks again.

p.s. manono am not doing video editing because i like doing it or anything. am doing it because nobody else does it and i cant find this particular movie 720p with dub.

[manono]

p.s. manono am not doing video editing because i like doing it or anything. am doing it because nobody else does it and i cant find this particular movie 720p with dub.

Real film enthusiasts don't watch their films with a lousy dub track. They use subtitles. That's why no one else does it. Only young children use dub tracks. Maybe this is a children's movie?

[Querd]

yes manono, i totally agree with you, i always use subs and never change the original audio, but this is a children's movie as you said , but anyway that's not the point here. at least we both agree

[manono]

OK, then stretching it by that amount wasn't exact enough to get rid of that progressive asynch.

Even though one is PAL and the other NTSC, my guess is that they aren't exactly the same. Maybe there's a short logo one has but the other doesn't. Maybe there are different amounts of black frames before the movie starts. There could be several reasons they don't match up exactly.

I usually do this using the 25 to 23.976fps preset in BeSweet. But eac3to can also do it quite easily. Rather than using Audacity for the job, and fooling around with the stretch, I'd suggest using one of the two programs I mentioned. If you're lucky, then all that will be needed afterwards is to find and set a delay, which is much easier to work with than a progressive asynch.

http://en.wikibooks.org/wiki/Eac3to/How_to_Use

[Querd]

am sorry that posting my answer so fast, but before studying the guide you gave me i have to inform you that my .mkv is already 23.976fps. do i need to change it?

[manono]

I was writing only about the audio. You have to slow the Greek audio from the 25fps PAL DVD to the 23.976fps speed of the MKV, right? That's what I was explaining.

[Querd]

got you. thanks a lot. i'll read everything and give it a shot, thanks for your patience