convert aif to mp2 directly?

[Midnight Tboy]

hiya,

like the post above says, I'm looking at a quick but good quality method of converting aif audio into mp2.

the reason I'm asking this is I have several hundred SVCD(CVDs) and now that I've got a dvd burner I've been looking at slowly transferring some of these svcds onto dvdr (to get 3 films per dvdr - reducing storage space, and eliminating need to swap cd halfway through films). There is big problems joining up ntsc mpeg2 files directly with the likes of tmpgenc etc into one big file, as 2nd half of the audio goes way out of sync....however I finally after lots of looking about found a method via dvdmaestro to join the vid streams, and then accurately join the audio streams together.

if anyone has had this problem and would like to know how to do it then let me know.


however one drawback, other than it being pretty time consuming, is the amount of times I have to re-encode the audio is a lot, and must surely result in some further quality loss.

For the audio, what I have to do is :-

1. demux the original svcd files so that I have the mp2 file from each.

2) convert the mp2 audio to uncompressed wav (I've been using winamps diskwriter option for that)

3) if that audio is at 44.1khz then I need to resample it to 48khz (I usually make 48khz cvd's so not usually a problem)

4) use the create soundtrack options in dvd meastro with the wavs in order to join them correctly which other tools fall short of being able to do.

5) dvd maestro gives me an .aif file so I then use winamp to record that .aif file back to .wav, and then I encode from the .wav back to .mp2 into besweet

so as you can see theres a lot to do with that audio, so ideally I'm looking for a way to at least skip out the .aif to .wav step in order to at least help the quality slightly (and speed up), tho so long as the encoding engine would be up to standard (unless anybody knows any better and reliable ways to allow joining of ntsc mpeg-2s.


hope you can help,

thanks in advance,
Tuck

[pacohaas]

man, if i were you, i'd save myself a whole lot of trouble and make sure I had a DVD player that could just play mpg's in sequence directly off DVDR's.

The process you're describing will degrade the audio quality from the re-encoding.

[oddyseus]

For the audio, what I have to do is :-
2) convert the mp2 audio to uncompressed wav (I've been using winamps diskwriter option for that)
3) if that audio is at 44.1khz then I need to resample it to 48khz (I usually make 48khz cvd's so not usually a problem)
4) use the create soundtrack options in dvd meastro with the wavs in order to join them correctly which other tools fall short of being able to do.
5) dvd maestro gives me an .aif file so I then use winamp to record that .aif file back to .wav, and then I encode from the .wav back to .mp2 into besweet

well to cut a long story short.
Eliminate step 2. No need for converting to wav files
Step 3 is a must if u r aiming at dvd as well as step 4 but u can skip step 5

Here is what I propose
1. Install svcd2dvdmpg by Chrissyboy. U can find the relevant post here (http://forum.doom9.org/showthread.php?s=&threadid=48994). Its an automated tool for converting svcd material to dvd compliant streams. Never could made it work for me for the video, but this is a differently another story.
2. After finishing working on the files u ll end up having some m2p at 48k
3. If u have access to Scenarist throw them in and answer 'ac3' up on asked what to do with the files. If u don't have such an access, maybe u can ask a friend that might has one.
4. Sync audio in Maestro using the ac3s.