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Perfect AV Sync: Preparation is key...

(inspiration, guidance and contributions from CGunn)

This guide shows you how to create DVDs from VCDs and/or SVCDs (movies, TV rips or caps) with perfect AV sync (or rather the same AV sync as the original mpgs).

The main difference of this guide to others is that I want to show you how easy it is to identify source mpgs which will have sync issues in the final DVD. If there are no "bad" mpgs then SVCD2DVD is used as normal (or other method). If we identify one or more "bad" mpgs - we need to re-encode them first.

If you are interested in the theory behind all of this click here.

Tools required

VirtualDub-MPEG2
TMPGEnc

Step 1: Collate source mpgs.

Get your mpgs into a working folder. If you have BINs - rip (extract) the mpgs using VCDGear/ISOBuster/SVCD2DVD

Step 2: Check AV Sync.

Fire up VirtualDub-MPEG2.

Drag an mpg on to the big grey area. VirtualDub-MPEG2 will import the mpg as shown (takes about 10-20 secs):

Once imported:

  1. Move the frame slider to the end of the "movie" and locate a sequence where you will be able to deduce AV Sync (lips during dialog is often the best).
  2. Click play on the "input" (i.e. our mpg) and observe whether the AV is in sync or not:

The whole of step 2 takes about 15 seconds for a 450MB mpg.

Repeat this step for all source mpgs and so find out which are "good" and which are "bad".

Step 3: Re-encode "Bad" mpgs.

If you have identified mpgs with AV sync issues in step 2 - you must re-encode them. If you identified none - this step can be skipped.

Fire up TMPGEnc. Close the wizard if it is shown:

  1. For Video source, browse to the "bad" mpg. Audio source will be filled in automatically.
  2. Choose an output for the re-encoded mpg.
  3. Pick a template for the process. Just choose the one which is equivalent to the source mpg. VCD NTSC, VCD PAL, SVCD NTSC or SVCD PAL.
    (you can change settings & load custom templates but that's another guide.....)
  4. If you only have the one file to re-encode then click Start.
  5. If you have more than one add this to the batch so you can do the lot at once:



Once you have your batch compiled click Run.

If you are having trouble loading mpeg 2 (SVCD) files you may need to install this: TMPGEnc MPEG2 Plug-in

Step 4: SVCD/VCD to DVD as normal.

If you identified AV sync issues in step 2 and re-encoded these mpgs in step 3 you now have source mpgs for your SVCD/VCD to DVD process. If you had no AV sync issues in step 2 you will only have added a couple of minutes to your whole process. Either way you are now ready to proceed with your SVCD/VCD to DVD method of choice - safe in the knowledge that you will not have AV sync issues.

SVCD2DVD is the easiest method - see how its done

Please remember that if mpgs have different bitrates then they must reside in different VTSs otherwise you will introduce AV sync issues in the DVD also.