Feel free to split this off or move or whatever... I haven't seen this technique here, but I've only been lurking a few weeks, and not religiously.

I found a different way of handling this issue:  using VisualHub to combine two Handbrake files.  By using -vcodec copy and -acodec copy, both the video and audio pass through and the final file is stitched from the two Handbrake MP4 files without any changes whatsoever.

What's cool about this technique, is, because the video and audio are passed through intact, you can stitch movies for PSP (a limitation of VisualHub) by simply selecting MP4 and activating Stictch Videos Together.  I'm willing to bet this same technique will work for any flavor of codec, so long as the container you use (AVI, MP4, etc) is the same as what contains it.

It should also be good for stitching multi-title content from a single DVD together, bypassing that Handbrake limitations as well.

A caveat: I bet you can only stitch two videos with the same video and audio settings together.  Since it's being passed through, two different codecs will probably freak stuff out during playback.

[img]http://www.radiocaravan.com/01b-stitch.jpg[/img]
Here's the two files to be stitched.  Since they're MP4 files, I selected the MP4 type.  To stitch them together, I selected Stitch Videos Together.

[img]http://www.radiocaravan.com/01a-advsett.jpg[/img]
Here's the advanced settings.  Not I touched nothing except the "Extra ffmpeg Flags" window at the bottom, where I added the two passthrough commands.

[img]http://www.radiocaravan.com/02-results.jpg[/img]
13 minutes later, here's the result: a 4 hour, 20 minute movie.  And it still works on my PSP.  I'm betting this will work for AppleTV files, iPod files, etc.  Most everything except the tiny details of the encoding are the same.

The time taken is minimal.  All it's doing is copying video and audio data in a single-file container.  It eliminates the need to do anything to the VOBs before encoding, and eliminates several steps.  Plus, if you like to buy your software, VisualHub is significantly cheaper than DTOX ($23.32 versus ~$80).

So there you go!