Thanks for the reply.
Across the DVD, I'm using between 5.5 and 6.5. All CBR.
I've just had a thought - can I mix videos with different bitrates on the same timeline? I've got an intro at 6.5 followed by a 60 min video at 5.8. Could that be the problem? Does all the video on a particular timeline have to be the same bitrate?
If not... any ideas, please?
I have never mixed different Bit-Rate materials, on the same Timeline, and especially as I usually do one Timeline for each Video Asset (edited to be a "scene," or Chapter). I cannot tell you.
What happens if you create one Timeline for one Asset, and then another for the remaining one?
Does that change anything?
I had been thinking that you had an MPEG that was out of the DVD-spec., but that usually results in Encore needing to Transcode again, to bring the file into spec.
Good luck, and I wish that I knew more about mixing Assets with differing Bit-Rates.
I was thinking about trying two timelines and using a playlist to run them together to see if that would resolve the issue. The problem is that Encore doesn't say which file or timeline is causing the problem, so I'm just guessing that this could be the issue.
That doesn't answer the problem of why Encore also thought that two audio tracks were different formats when they weren't, which is a problem in case that error crops up again.
Anyway, I'll try two timelines and re-render the intro to the same bitrate to see if either works.
I put them through Media Encoder again anyway
That was your mistake. Premiere Pro, AME and Encore all use an indexing system for compressed files. You can't change anything about those files without also changing the indexing, or you will get this error.
The solution is to never change a file once it's imported into Encore. If you change an asset in any way, even reencoding, then you have to rename that file, which forces Encore to do redo the indexing.