SYNC problems when rendering and burning

[Sulpicio]

Hi

I have been editing a 5 minutes home video in Womble Mpeg Video Wizard.
(transfered an analog tape to DVR then the joined the VOB files with DVD Decrypter and made cuts in Videoredo).
I wanted to add sound (mp3 file).

God knows I want to like Mpeg Video Wizard (I am in the trial process) but I had lots of problems: the rendered mpeg was synced differently than the internal preview.
I then found out that one can digit frame values for each clip. It made the rendered mpeg closer to what I had in mind, BUT.....
Huge suprice after burning the MPEG2 to DVD with Nerovision Express. The audio was even more out of sync then the rendered MPEG, only 5 minutes of footage, WTF?

So questions:

• why this delay? Can it be fixed?
  in general, is there a way to get a better result? Tools I don't have?
  Something I missed?
  Since most of my footage comes in streams from the DVR, I feel kinda forced to edit MPEG, recoding would be very time consuming, like MPEG>AVI>MPEG , right?

many questions, I hope you'll answer, I've already learned a whole bunch from you guys!

thanks!

[AlanHK]

Is the MP3 sampled at 48k, or perhaps 44?
For DVD MPEG2 should be 48.

Try converting the MP3, eg with BeSweet (use the Wizard interface, it's got all the features you need) to select MP2 output, 48k sampling rate, and a bitrate of 128k or higher (up to 320 if you're an audiophile). Then mux that in Womble with your video, edit it, save it, then demux for authoring.

[Sulpicio]

Hi Alan

thank you for your reply. Good solution indeed, yes the audio part was an mp3 at 44.1 kHz mp3.

I got a much better result by converting the audio mp3>wav and wav>mp2 (with Rejig), then muxing in Rejiig and authoring again.

I learned the hard way (time waist) that mp3 isn't a suitable format.

I haven't still found out wheter I'll buy Womble Video Wizard or not: it does a few things no other app that I know of does, but I find it a bit quirky at times. I described in another tread how it chokes on >3 gb VOB files and doesn't fix the DVR streams properly. Still I think it's the only mpeg editor with transitions and titles and it's quite powerful: heck I guess I'll get it.

[nightcat]

Sulpicio,

Hi. I think the main reason caused the unsynchronize of video and audio is the MP3 file supported. I have an idea to avoid this problem. The steps is below:

1. Open your MPEG Video Wizard DVD.

2. Only drag and drop your MP3 file into Audio track in Timeline.

3. Convert the MP3 file to MPEG Layer II audio file. The MVW support the MPEG files very well.
Detail :
(1) Click the Export button on Timeline.
(2) Set the 'Save as type' as 'Custom', click the 'save' button.

(3) Set the 'Audio -> Format' as 'Layer II'

(4) Switch to the 'Monitor' page and click the 'Start' button to convert the MP3 to MPEG Layer II audio format.


4. Edit your Video and Audio (the converted file) on Timeline, then click the 'DVD' button to dump current project to DVD Maker. You can edit the DVD Menu and export the DVD Folders.


Wish to help you.

[AlanHK]

(3) Set the 'Audio -> Format' as 'Layer II'

Problem here: the sample rate shown is 44k; as for VCD mpeg1, should be 48k, for DVD mpeg2. (Note the last screen says "Press start to build a mpeg-1 audio file".)

[Sulpicio]

all right, thank you for your help, guys.

then I guess my safest best is converting mp3 to 48 kHz mpa with a free tool like Super. It certainly made a huge difference!