44khz -> 48khz (VCD to DVD)

[JJS]

I have about 17 episodes of a TV show that were recorded to VCD and edited to remove commercials that I am trying to burn to DVD. I know the audio must be converted from 44khz VCD standard to 48khz DVD standard but I am having a great deal of trouble keeping in sync.

I've tried using the VCD -> DVD guide on this website to no avail. Some of the episodes are in sync throughout and the rest start out in sync and gradually end up a few seconds off by the end. I've tried letting Ulead DVD Movie Factory do it once (took all night for the damn things) and using TMPGenc with the SSRC and toolame converters and I get the same result every time.

Anyone have any ideas on what I can do? I'd like to try doing the entire audio portion manually. That is, convert the mp2 to wav, use SSRC to change the sampling rate, and then use toolame to convert back to mp2. I have a feeling TMPGenc is doing something wrong, but that wouldn't explain why some work and others don't.

BTW, before someone recommends (S)VCD2DVD, been there done that, same result :P

Thanks for the help,
Josh

[roach76]

Try using BeSweet. One of the best of the free audio programs out there.

http://dspguru.doom9.net/

[Bondiablo]

you can also try seperating (de-multiplex) the video and audio of your encoded file, then stretch or shrink (dont just add silence or cut part out) the audio file by however much it ends up being out of sync at the end in an editor, then combine (multiplex) the video back with your edited audio.

[JJS]

What software should I use to stretch the audio?

[Bondiablo]

any audio editor that's capable of doing it. i use cool edit by syntrillium.

http://www.syntrillium.com/

[JJS]

I downloaded the trial version of cool edit 2000 from their website and converted a 44khz mp2 I had demultiplexed and converted to wav format. The 48khz wav came out the same length as the 44khz one, as well as the mp2 i re-encoded from the new wav. Once I multiplexed the m1v and the new mp2, the audio got out of sync, even though it is still the correct length seperate from the video.

Am I missing something?

[Bondiablo]

as i said you need to figure out how much it's out of sync (how much time passes between when someones lips moves and the words come out or something similar) by the end of the file and stretch or shrink the audio accordingly.

[trillium]

YAmp or BeSweet (I use the BeSweet GUI and SSRC.exe) to resample my wavs from 44.1 to 48.

[andydd]

Id use Goldwave to covert to 48 khz (you can get it free), it can also be used to stretch the audio if its outta sync but it is kinda fiddly

[ChrissyBoy]

JJS: the problem you have is the fact that the mpgs have been edited - to strip the ads. Because of the GOP structure of mpg-1, once you demux you will never be able to mux them correctly again (even without re-encoding the audio). I had exactly the same issue when i tried to put a complete series of a tv show on dvdr. i gave up in the end. However the closest i got was by following this guide....


Good luck!
CB

[JJS]

That explains why the first episode came out alright, it was a commercial free broadcast, heh.

Would it "fix" the problem if I re-encoded the video stream as well? If I do it will be to an mpeg2 of much higher bitrate so the video doesn't become *too* much worse.