Log in

View Full Version : SVCD Merge Problems & Misc


Eldorado
16th September 2002, 20:46
Hi there, I have a few questions that generally pertain to SVCD's, although my final goal is to create a complete dvd compliant movie.. so some of my questions might go outside of the SVCD topic..

First, I have an SVCD movie which is split into 3 discs. I want to join all discs together so I used TMPGEnc. It joined them, but when I looked at the result, at the first join the video appended as it should, but the audio was cut. About 15 seconds from the end of the first disc is cut and the audio for the 2nd disc begins, creating a huge sync problem. Any ideas why it did this?

Second, related to that, the person that created these discs must have noticed how the first disc ends in mid-sentence, so the 2nd disc starts with ~3 seconds of the end of the first disc. So I have a problem where a simple merge will not look nice.

Is there a program out there that will merge my mpegs nicely, and (going out on a limb here) be smart enough to know which frames match and where to begin the merge? If not, how about a program that I can use to edit the properly merged mpeg and cut out those extra frames to make the movie flow smoothly?


Third, my next process after I hopefully have a completely merge mpeg is to run it through DVD2AVI to demux the mp2 audio and create a D2V file. I then load the D2V file into CCE using Avisynth to resize to 720x480 and crop to convert from 4:3 to 16:9. Would anyone recommend an easier way to go about converting the video?

Last, this SVCD appears to have chapters created. Is there an easy way for me to extract these so that I can use them when I'm authoring the dvd?

I've completely authored the whole movie, everything looks and plays perfect through my standalone, just that damn mpeg merge screwed it all up :)

Eldorado
17th September 2002, 18:39
I've just tried 2 more programs to merge my SVCD files together, M2-Edit and MPEG2VCR.

M2-Edit is a sweet program, allows me to pin-point down to the exact frame that I want to start the joins at. But still the audio is out of sync and I'm missing about 20mins of the movie somehow!

MPEG2VCR seems to be a good program also, but it's not very straight forward and not as exact as M2-Edit. I edited the discs to where I want to start the join, dragged and dropped the clip from the 2nd disc onto the first disc, video merges nicely, but again audio is out of sync!

This is very frustrating just trying to simply merge 3 svcd files together! Is there something I'm missing or should be watching for? This is a VBR SVCD..

Mac Sidewinder
18th September 2002, 18:31
Have you tried this: Demux both clips - join the video from both into one file then join the audio from both into another file - finally join the resulting video and audio file and see if it stays in sync?

Mac

Eldorado
18th September 2002, 19:51
Actually that's my latest test, although a bit different to save me a step.

I loaded up each of the 3 discs into DVD2AVI, save project, output one nice MP2 file and a D2V file. It's running through CCE right now re-encoding the resolution. I was then going to load up TMPGEnc and mux the finished M2V and the MP2 back together and see how she goes.

Only problem left with this is the 2-3 second repeat that will be at the 2 join points. So I'm hoping I can make cuts at those points with the new mux'd file without any issues with audio sync

If not, I'm giving up and will just burn it in dvd format and live with those two small flaws, or at least those who I'm giving this to will have to :)

Eldorado
19th September 2002, 22:16
Ok everything has worked out great, DVD2AVI created a nicely merged audio file as well as a D2V file to go with it that I ran through CCE to change the resolution. Authored the DVD, and it plays sweet and audio in perfect sync.. never figured out how to cut those 2 seconds of overlap out, can't find any software that will do it. Any software that I use to make edits cause audio de-sync


Only thing left that I would like to do is add the chapters to the finished DVD. The SVCD has chapters, is there anyway that I can extract the chapters so that I can use them in Scenarist? How are they stored on SVCD's?

Eldorado
26th September 2002, 16:37
Bump... anyone know if extracting chapter points from SVCD's is possible?

msimon7
21st December 2002, 04:12
hello. one great way without having to re-encode the file is to follow this guide
http://www.doom9.org/index.html?/mpg/svcd2dvdr.htm
i've the same problem with the audio getting out of sync at the merge points, so i'm going to try some of the suggestions i've read in this thread and others.
they quality is exact after following this guide and it saves a lot of time. highly recommended! nice job to the author.

htc10825
29th December 2002, 10:29
Originally posted by Eldorado
Bump... anyone know if extracting chapter points from SVCD's is possible?The SVCD chapter points can be ripped with vcdeasy, if have the SVCD in form of cd(not mpg-file). Goto the tools session and choice "vcd build/rip" + "xml files only" and rip the xml file. The chapter points will be showed in the xml file as "sequence entry points" in seconds counted from file begin.