Shouldn't be any need to convert, but you may need to massage the video and audio streams a bit to get them to work. The following doesn't work with every broken MPEG2 file, but I've had a pretty high rate of success with the following process (I'll assume you're using Windows):
- Get ReJig and Restream (both are free and involve no installation).
- Open ReJig, and click the File Mode button. Click the Add button, and then the next Add button; navigate to and select your VOB file. Click Done.
- In the "Stream List & Demuxing" pane, you'll see an MPEG Video Stream and (probably) an AC3 Audio Stream; if the audio stream has an "AudioDelay" tag, check the "Fix & Correct AC3 Delay" box.
- Select the MPEG Video Stream, and click the Demux button; pick a save location and file name, and hit Save. When the video is demuxed, do the same for the audio stream. When done, you can close ReJig.
- Sometimes at this point, you can import the M2V file (that's the demuxed MPEG Video Stream) into Premiere and the file will be correct; if so, just import the AC3 file, sync-and-link them and edit away.
- If the file still shows the wrong duration, open Restream and load the demuxed M2V file into it.
- Under the "Group of Pictures" section, check the "reset timestamps" option; this will usually fix the broken duration. Pick a save location and name (by default, Restream appends ".0" to the filename), and Save the file. Try importing this file into Premiere and check its duration and playback.
You can mux the files together if you want, but I usually just import them separately and link them together in Premiere Pro. If you want to mux them, let me know and I'll add those details.
Giving this a try now. I'll keep you posted-
This worked! Aydio files are the correct length!