TMPGEnc encoding with Video ONLY, after demux

[pcexpress-guy]

ok... i have demuxed a VOB. I have 2 seperate streams for audio + video. Now, what I like to do is use TMPGEnc, to apply a few filters, then re-mux the streams, to a single file.

So... I am tried to import the audio to TMPGEnc, but it says it is not supported. Since I am not doing anything to the audio, can I just apply the filters, create the new video ONLY file, then remux it with the audio?

Will this approach increase the chance that the audio will be out of sync with the video? (or will it have no effect on this issue?)

I am somewhat new to this procedure.

Thanks!!!

[petar]

Since I am not doing anything to the audio, can I just apply the filters, create the new video ONLY file, then remux it with the audio?

Correct

Will this approach increase the chance that the audio will be out of sync with the video?

Shouldn't

[daamon]

Hi pcexpress-guy,

Where is the source VOB file from?

If it's from a commercial DVD, then there's a good chance the audio is in AC3 5.1 (i.e. 5.1 means 5 & 1 = 6 channel surround sound) - which, as you've discovered, isn't supported by TMPGEnc.

...can I just apply the filters, create the new video ONLY file, then remux it with the audio?

Yes, I'd say so - although I've not done it, it seems logical.

Will this approach increase the chance that the audio will be out of sync with the video?

Shouldn't do, as long as you don't affect the length of the video footage (i.e. adding / deleting stuff, possibly changing the framerate - not sure on that one).

Of course, you could always "go for it" and see...

[pcexpress-guy]

Thanks for fast reply!

BTW: how do these audio out-of-sync issues come into play?

THANKS AGAIN!!

[pcexpress-guy]

Hi Daamon,

Our messages crossed! Thanks for the reply too... it is AC3 audio stream. I thought about getting the AC3 plugin, but I thought why do this if the audio and length will not be effected before it is remuxed.

I just wondered if I was missing something or if by seperating the audio & video I was increasing the chance that these would get out of sync.

as ya can see, I am not real clear on how these audio-video out-of snyc issue come about. (but I have a few videos which this has happened.. not sure how it happened, but I am a little about it happing again.

ThANKS!

[petar]

Happens when you cut/merge or if there was a sync problem in the original to start with. But muxing/demuxing shouldn't affect the sync (unless there's a bug in the application).

[pcexpress-guy]

Ah, that could be it... I used TMPGEnc Author, and I had 3 videos under one title. The first video played fine, but the last two were out of sync. I remember being agrevated by this at the time, all 3 source files were in sync(if viewed seperate), but the adding of videos within this project created some out-of-sync problems.

ah... so I know this might be like pulling a magic rabbit out of hat, but what went wrong? and how do I fix this sort of problem? (I mean in a general sort of way.)

I think out of 20 projects, I have this single project in TMPGEnc Author which was out-of-sync. It was strange and I had no understanding as to why it happened.

Any help with this would also be great!!

[petar]

I don't use TDA very often so I don't have a great deal of experience with it. If you have a different authoring tool, try it.

If not, author the three titles in separate VTSs (I think TDA calls them tracks). By separating them, each VTS is muxed on its own so there's no merging involved. I think TDA gives you the option of having a "Play All" button so you can watch all three titles in a row (probably with a small pause in between).

[pcexpress-guy]

I follow. so these sort of errors happen in the remux of multiple videos, within the reauthoring process, no?

The strange thing is why most of my video's work just fine, and others don't. I bet there is an article about this somewhere.

Hmm... It is curious, why some videos work fine and others don't when these are re-authored as most of my re-authored DVD's work fine (with TDA).

keeping fingers crossed.

thanks!

[petar]

When you author two or more titles in the same VTS they are all muxed together in the same VOB(s). This shouldn't cause any sync problem but maybe you've found a bug in TDA. That's why I suggested you try authoring them in separate VTSs.

If you always get sync problems when putting together two or more videos on one VTS contact their support team.

[pcexpress-guy]

Thanks!

It is really strange with the sync thing. It happens only for these particular videos, and I can't seem to be able to create the same problem with 3 other videos?

BTW: what would be your top-5 (or so) of alternatives to TDA?

Thanks again!

[daamon]

It happens only for these particular videos...

Which would suggest that the problem is with them, and not TDA. Not sure of what tools can interrogate VOBs for errors...

BTW: what would be your top-5 (or so) of alternatives to TDA?

In no particular order:

1. DVDLab
2. Sonic ReelDVD

These are based on comments I've seen in these forums, not from my own usage. I have seen others, but with mixed reports. Your best bet is to look under "DVD Author" in the "Tools" section.