Trying to modify .VOB file - why didn't this work?

[brassplyer]

Have a DVD created, wanted to see if I could modify the audio of the menu directly without changing anything else. The menu has text over a video.

Located the VOB file that has the video for the menu. Changed the extension to .mpg, loaded it into Pinnacle Studio, replaced the audio, recreated a new mpeg-2 file, gave it the same name as the original and put it in the Video_TS folder.

However on playback while the menu looks more or less the same, the playback is hitchy, there's NO audio and no menu item selectability.

So obviously there's more going on here. Why didn't this work and is there a way to do what I tried to do?

Thanks for all input.

[Baldrick]

Your method wont work.

Try author your mpg to a vob with muxman and then use vobblanker to replace the menu vob. See for example https://www.videohelp.com/guides/how-to-replace-dvd-menus-with-vobblanker-avi-video-id959#959

[brassplyer]

Your method wont work.

What's different between the .VOB file and the mpg file? Is there data within the original .VOB that the authoring s/w made and my "recreated" .VOB that some other file is looking for that isn't there?

[hech54]

Your method won't work....plain and simple. You can sometimes rename a VOB into an MPEG files....but that's where it ends. You cannot edit one VOB of the DVD then stick it back in.

[brassplyer]

Your method won't work....plain and simple. You can sometimes rename a VOB into an MPEG files....but that's where it ends. You cannot edit one VOB of the DVD then stick it back in.

Right, I've seen that this is so but wondering why. You can change the extension and .VOB files will play as mpeg's so what's the actual difference between the files?

[hech54]

"The VOBs have been authored to be part of the specified DVD structure that "lives" inside of the VIDEO_TS folder and only inside the VIDEO_TS folder" is the best way to explain it. All of the VOBs inside that VIDEO_TS folder rely on each other.

[brassplyer]

"The VOBs have been authored to be part of the specified DVD structure that "lives" inside of the VIDEO_TS folder and only inside the VIDEO_TS folder" is the best way to explain it. All of the VOBs inside that VIDEO_TS folder rely on each other.

There's other data within the file not obvious from typical "file properties" that's linked to data within other files?

[hech54]

"The VOBs have been authored to be part of the specified DVD structure that "lives" inside of the VIDEO_TS folder and only inside the VIDEO_TS folder" is the best way to explain it. All of the VOBs inside that VIDEO_TS folder rely on each other.

There's other data within the file not obvious from typical "file properties" that's linked to data within other files?

Yes....info you cannot replicate outside of an authoring program.

[Blueknight]

Not sure if you can edit your menu again but I'm pretty sure that you can edit the videos.