I've never had any audio sync problems with ConvertXToDVD, until version 2.0.9, with, apparently, the "introduction of new audio sync routines" according to the changelog of 2.0.8. The last version I used that worked properly was 2.0.7.

I always use AVIGUI Mux before running ConvertX, to check for any audio delay problems and correct as needed. Never had any problems and swore by this method.

Recently, I load an avi file into AVIGUI Mux....0 ms delay. OK. Everything looks good. Any other time, encoding in ConvertX after this result in AVIGUI, would mean no sync problems whatsoever. But, in version 2.0.9, this is not the case. Audio was out of sync throught the entire finished DVD.

I then reverted back to 2.0.7, before the "new audio sync routines" were implemented. Using the same avi file in the scenario above, encoding completed with NO audio sync issues whatsoever. Perfect DVD.

Notice the error message in the changelog below. "ENGINE: looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag" - This is something I hadnt run across until version 2.0.9. There were also reports of audio discrepancies (24ms) at the start of each chapter. Note that the "Conversion failed", b/c I stopped it manually, to view the result thusfar. This was my second test run w/ 2.0.9, as I was a little confused by the first run's result.


Here is the log from version 2.0.9.119:

3/3/2006 7:55:04 PM info ********** Report session closed ***********
3/3/2006 7:55:02 PM info --------------Encoding end--------------
3/3/2006 7:55:02 PM info Conversion failed after 00:17:36
3/3/2006 7:54:39 PM warning Audio discrepancy in input stream at 1152046.67 ms: 24.00 ms of audio missing
3/3/2006 7:53:12 PM warning Audio discrepancy in input stream at 1056042.67 ms: 24.00 ms of audio missing
3/3/2006 7:51:41 PM warning Audio discrepancy in input stream at 960038.67 ms: 24.00 ms of audio missing
3/3/2006 7:50:47 PM info Chapter #4 start at 14:59.632
3/3/2006 7:50:17 PM warning Audio discrepancy in input stream at 864034.67 ms: 24.00 ms of audio missing
3/3/2006 7:48:50 PM warning Audio discrepancy in input stream at 768030.67 ms: 24.00 ms of audio missing
3/3/2006 7:47:27 PM warning Audio discrepancy in input stream at 672026.67 ms: 24.00 ms of audio missing
3/3/2006 7:46:24 PM info Chapter #3 start at 9:59.632
3/3/2006 7:46:04 PM warning Audio discrepancy in input stream at 576022.67 ms: 24.00 ms of audio missing
3/3/2006 7:44:39 PM warning Audio discrepancy in input stream at 480018.67 ms: 24.00 ms of audio missing
3/3/2006 7:43:07 PM warning Audio discrepancy in input stream at 384014.67 ms: 24.00 ms of audio missing
3/3/2006 7:41:52 PM info Chapter #2 start at 4:59.632
3/3/2006 7:41:42 PM warning Audio discrepancy in input stream at 288010.67 ms: 24.00 ms of audio missing
3/3/2006 7:40:22 PM warning Audio discrepancy in input stream at 192006.67 ms: 24.00 ms of audio missing
3/3/2006 7:38:50 PM warning Audio discrepancy in input stream at 96002.67 ms: 24.00 ms of audio missing
3/3/2006 7:37:26 PM info ENGINE: looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag
3/3/2006 7:37:26 PM info Stream #1 Sync. delay : 0.00 ms
3/3/2006 7:37:26 PM info Stream #0 Sync. delay : 0.00 ms
3/3/2006 7:37:26 PM info Output Stream#1 - Audio: ac3, 48000 Hz, stereo, 192 kb/s
3/3/2006 7:37:26 PM info Output Stream#0 - Video: mpeg2video, yuv420p, 720x480, q=3-31, 2035 kb/s
3/3/2006 7:37:26 PM info Video Stream #0 framerate : 29.97 Fps, no pulldown
3/3/2006 7:37:26 PM info Padded source image : Left 0, Top 56, Right 0, Bottom 56
3/3/2006 7:37:26 PM warning Source frame rate is too low to allow pulldown conversion.Frame duplication will be used.
3/3/2006 7:37:26 PM info Video source original frame rate: 2.00
3/3/2006 7:37:26 PM info NTSC 29.97 FPS output format set automatically
3/3/2006 7:37:26 PM info Widescreen (16:9) set automatically
3/3/2006 7:37:26 PM info Video bitrate 0/2035/8308 Kbps (min/avg/max)
3/3/2006 7:37:26 PM info Converting "D:\XXXX.avi"

Hello,
in 2.0.9 of convertX, we have changed the strategy of audio synchronization. We assumed that the audio stream(s) were perfectly continuous, since 2.0.9 we no longer make this assumption. Doing so, we have solved many case of files that started in sync and as the audio gaps inside the stream was encountered, the sync was finally lost.

Here is how we do since version 2.0.9: On the input file side, we collect the total time since the start of the file, and we compare it to the total time of audio generated with the audio packets provided so far. So for instance, if the engine has read 10 seconds of audio data from the input file, but generated only 9 Sec and 900 ms with that data, then there is 100ms of missing audio. To keep the synchronization, the engine has no other choice than generating a blank to fill the gap.

This was *not* handled in previous versions, but now it is. One may be afraid because 2.0.9 report several discrepancies were previous version reported nothing, however the result is usually better as the file has bigger chances to be synchronized from start to end. We have also been surprised to see so many frequent discrepancies, it seems it's pretty common in AVI file.
IMHO, It's a consequence of cheating with the timestamps to resynchronize audio and video without the need to demux/remux the whole file.

From our test, we have seen that it really improves the synchro but it's true that under rare circumstances it may worsen it. So when you see a lot of discrepancies reported during a conversion, it's a good idea to check the output (with VLC for instance) before burning the DVD, to see if it's acceptable.

@R3VOLV3R:
in your specific case, it seems that the discrepancy occur each 96 seconds,
you have one at 96, 192, 288, 384 ... 24 millisecond each 96 seconds, a very regular scheme (not related to chapter start), so headers in your source AVI has probably been tampered to adjust the audio synchronization. No matter you have these warning, result *may or may not* be just fine and in sync. Audio discrepancies are reported to draw your attention "check before burn"

Thank you for your reply, but, the problem is reported by several users already and does appear to be an issue with the latest build.. Check through other forum sites that VSO uses for tech support and you'll see another thread I started w/ the same topic. I don't wanna give the name, out of respect for this forum. But anyway, several others have reverted back to 2.0.7 and are using it successfully until the issues are fixed.

Well, I tried out 2.0.9.119 and sync is fine! I used a 2-700MB 25fps movie that I joined into 1 avi using avidemux2 and I converted it to NTSC DVD with no sync problems. Excellent results.

just downloaded 2.0.9 yesterday and now audio is out of sync.

Using mpg files edited with VideoRedo then checked with Windows Media Player and Cyberlink PowerDVD. The files are still in sync right up to processing by ConvertXtoDVD, then the audio is severely out of sync on burned DVD.

Log file on screen does not show any errors.

Did not uninstall old version of ConvertX . . . .
Old version set flags (autoplay, loop, sequential) even though flags were unset in software.
New version hangs when trying to close. Have to close it with Task Manager (forced close).
Latest log data is not in log file! :-o No log file data since upgrade (last message is "Newer version (2.0.9.119) is available on internet".
Old version was 2.0.5.107, downloaded 26.Feb.06 (worked but buggy)

I can't use the output with unsync'd audio.

Strongly suspect a bug here . . . .

Ok, I can confirm that there is an audio sync issue with this version. The last time I converted, I already had AC3 audio in the AVI so it didn't need reencoding which is why it worked perfectly. Now I tried to convert an AVI with VBR mp3 audio and I now get a "96.00ms of audio missing" warning like the others above are getting. So there definitely is a bug somewhere in the audio processing.

Hi there,

Here's my view of things (I may be wrong but it's my 2 cents anyway)

I think ConvertXtoDVD prior to v2.0.9 just ignored a lot of audio discrepancies in the input files.

Now they are properly tracked, which is good, but causes out of sync issues.

I think it's not a ConvertXtoDVD bug, but more issues with the input files themselves.

Junk in, junk out !

That's my opinion.

Comments anyone ?

That's certainly possible. Although, I checked the source AVI in several media players (WMP, MPC, BSplayer) and the audio was in sync.

What would be awesome is if ConvertXtoDVD can do "Junk in, Perfect out" processing!

Okay, I re-read what lapinou said and I'll let the the conversion complete and test the results if its actually in sync (I cancelled the conversion when I saw the warnings)...

I can assure you, Jolibee, if you are getting those warnings, as I was, your finished DVD will be out of sync. The audio discrepencies may now be properly tracked, but, this has done nothing than cause more problems in the end. The VSO team needs to back it up, before these new sync routines were implemented and suggest the use of AVIGUIMux before each conversion process to all users. That method was flawless. The so-called new sync routines are anything but. There are and will be ALOT of users reverting back to older versions, if these new sync routines arent fixed within the program or taken completely out.

Hi there,

I do not convert TV captured files, maybe this is why.

But until now, I've been getting 100% success with torrent movies.

Not 1 single Out Of Sync issue, and no 00ms Audio Missing in the logs either with v2.0.9.

I know it's frustrating, and I am not saying this is a good thing, but I don't think VSO created a BUG, just a feature that captures all those video discrapencies, that results in Out Of Sync.

Is this what you guys do, convert TV captured files ?

VSO are aware of the cause of this new feature, and let's see what they decide to do for future releases.

My 2 cents again

You are right. The DVD was definitely out of sync. I did work around it by converting the audio in the AVI to AC3 then running that through ConvertXtoDVD and the result was fine. The issue probably has something to do with VBR audio not being handled properly.

I'm sure VSO will fix this problem, hopefully in the next release.

Hi cougar_ii,

I noticed a newer version of 2.0.9 when you download its 2.0.9B. Was there a 2.0.9A? What is different in the "B" version vs. the first version of 2.0.9 VSO posted?

I am of the notion that if its not broken, don't fix it. Therefore, I am reluctant to update unless I have good reasn.

Where can I get my hands on a previous version? I tend to overwrite the .exe when I download the latest, so I don't have a version history.

While I appreciate there are additions and features and upgrades happening, the bottom line is that I have projects to complete, and those projects require synchronised audio. I'm limping along for the time being with Nero, but it takes a bloody age to convert anything.

ConvertX has been an awesome programme until now, but at the moment I am finding it quite unusable and need to load a previous version.

What do you mean my previous version?

There was an official 2.0.4 download then after weeks, there was a 2.0.9 download. In between there were a bunch of other unofficial beta downloads.

RE: 2.0.9

There was 2.0.9.118 (Just before the official post on VSO web site). This never was official.

On official VSO web post there was 2.0.9.119.

Now its 2.0.9b which shows 2.0.9.119 when you do a About to check installed rev.

No history as to 2.0.9 vs. 2.0.9b.

Maybe they fixed your sync problem!

Im trialing ConvertXToDVD 2.0.9.119 and Im thinking of changing to a previous version because of the audio sync issues people are mentioning. What previous version did you use that didnt have audio sync problems?

Thanks

v2.0.7.114 is the version I reverted back to.

-Before the new sync routines were implemented.

I just download the updates when ConvertX says there's one available. The version I am running now, which has caused me all the grief with audio synchronisation, is 2.0.9.119. Prior to this release I have not had any problems. Could be the source material, could be the version. All I know is ConvertX can't handle the source, while other programs can.

I'm a results-driven sort of person, and I bought VSO ConvertX because it gives me excellent results reasonably quickly. The down side of it is that I am spoiled by how easy and reliable it was, so I don't know how to re-process my audio from mp3 to ac3, nor do I really want to know, if I have a tool that can convert my files properly.

NeroVision Express can do it, and has more flexible menu options, but it takes a long time and I don't believe the results are as good. But for me it's a better option than figuring out what programme to use to reconvert audio and jump through a whole bunch of hoops to use a product that I purchased based on its ease of use. If it ceases to be easy to use, it ceases to be what I want.

I hope this audio issue is resolved quickly, so I can go back to using my programme-of-choice.

Ok, so it seems we need a rework on these routines - but the problem is really that new routines solved problem. Reverting to old routine will also revert to old problems - that is really something we want to avoid.

Is there someone here that can upload a file that reproduce the problem to our ftp server

please contact claire_at_vso-software.fr to obtain the l/p of the upload ftp.

Hi R3VOLV3R,

Do you have any files to offer VSO Software, so they can reproduce this Out Of Sync issue ?

I keep downloading and downloading TV shows and I still can't find a problematic file to offer VSO.

I'm still 100% without an issue with v2.0.9.119

Contact claire_at_vso-software.fr (replace _at_ with @) if you can offer them problematic files.

Thanks !

I'm not sure. Since the problem w/ 2.0.9, I have since converted those said files in 2.0.7, and have been back on my usual rampage of producing dvd's w/ ConvertX. I'll have to install 2.0.9 again and see what happens with the files currently on my comp, none of which being the files behind my posting here. We'll see. I'll definitelly email the results to the address you mentioned above. Thanx.

@ R3VOLV3R

You said that you use AVI-Mux to check that audio is correct before converting to DVD. Ive never used it before but is the screenshot below correct? Is the audio is sync?

Also ive heard that VBR MP3 audio has a high chance in getting audio sync issues when converting to DVD. Is this correct?




Thanks

I just completed making my first DVD with ConvertXToDVD and the quality at medium is very good so I suspect high would be awesome. My mate told me to install K-Lite codecs because he said it helps fix problems with .avi files (if they have any). Anyway I had no audio sync problems with 2.0.9.119.
So im happy.

Keep testing. I'll bet you have audio sync issues w/ v2.0.9 soon.

no sync problems here