[DanielG]

I have a project that runs for 101 minutes that I'm encoding to DVD but I'm having issues with Vegas Pro 10 adhering to the specified bitrates in CBR or VBR mode. Every encode I've done so far results in bitrates significantly higher than expected and therefore the finished file is too big for DVD.

Here are the results of my latest test.
Length of footage: 101 minutes
Bitrate: 5600 kbps (constant bitrate)
Audio: 384 kbps (mp2)

According to a bitrate calculator the resulting file should be 4,650,435,400 bytes (this is only approximate) but the actual file size is 5,096,998,912 bytes.

When I run the encoded file through a bitrate viewer (included in DVD-Lab Pro) the average bitrate reported is around 6500 kbps and sometimes spikes at 8000 kbps.

I have also tried encoding using VBR with the same issues.