Confused!!!!!

[hassali]

Hi, i'm sorry but i have quite a few files and no idea where to start !!
ok, first - i have an Xvid and DVD of the same movie, however although the DVD has Dolby Digital (AC3) it is not clear in a couple of parts and has a bitrate of 384kbs. The Xvid also has AC3, but sounds alot better with a bitrate of 448kbs.

I'm wanting to replace the audio on the DVD with the one on the Xvid.

This is where the problems begin !! The length of the movie is different in the xvid compared to the dvd, since dvd has the full complete thing (including credits and opening etc) I have demuxed the audio from the xvid, but am unsure as to how to go about and mux / encode the audio into the dvd and keep it in sync with the video.

Any help as to where to start or to point me in the right direction would be greatly appreciated.

thanks

[hexxisoft]

convert both to WAVs and MPEG2s, download a vegas 5 trial, drag everything that you wanna lineup in there, line it up, render to mpeg2-DVD template and burn, bing bang boom, you're done. i've done it a million times.

[hassali]

hey, thanks, but will that keep the audio in 5.1?? and will the video and audio be in sync??

thanks for the help

[hassali]

i've tried using sony vegas, but that wont accept either ac3 or wav files??
I now have the m2v of the dvd and the ac3 from the xvid, is there any other way of multiplexing them together while keeping them in sync. ( the xvid starts around 49 s after the dvd)

[hassali]

ok, i've managed to multiplex the ac3 audio with the m2v, and luckily get it in sync..... in the beginning only !!!!!!!!!!!

The movie goes progressively out of sync !!!!

The framerate of the xvid was 25fps and the dvd is 29.97fps.
I'm kinda lost with the framerate stuff so i could really appreciate any help.

Thanks

[dafreak]

here's something you can try. rip the dvd to your hd using dvddecrypter. do not split the vob's and leave the vob as a single vob stream.

next feed the vob into virtualdubmod
choose streams | stream list
right click on the appropriate audio stream and choose full processing
then click on save wav
save the file as a wav file onto your hd.

next, use ffmpeggui to convert the wav file to 448 kb/s bitrate.

now multiplex the video and the new ac3 file back together.
using the audio from the original dvd should ensure that it does not go out of synch.

[hassali]

thanks for the reply dafreak, but like i said, the sound from the dvd is not true DD5.1, it is stereo sound forced through 5 speakers, thats why the quality isn't good. Compared to the xvid which has true 5.1 sound.

I've been trying for ages and the furthest i've come is the ac3 from the xvid multiplexed with the dvd video but it progressively goes out of sync!!

If anyone could give me any advice as to what i should be doing or any mistakes i've made, coz i'm getting kinda fed up with this and will probably give up if it doesn't work.

thanks again

[hassali]

ok, i've done a little more !!

I've tried re-encoding the ac3 with a framerate of 29.97, same as the video, but the audio speeds up and the overall length is shortened.
When i changed the framerate to 23.97, the audio slowed down and became longer than the video.

The framerate of the the xvid (where i extracted the ac3 from is 25fps) and the video is 29.97. When i try to multiplex them like this, the audio progressively goes out of sync.

I'm really stuck at this point and i've spent so much time on this, i would really like to get it done, so any help would be greatly appreciated.

[jimmalenko]

If the audio progressively gets out of sync, before you mux them together, use goldwave to time warp your audio file so that its length matches the length of the video.