Currently Being ModeratedNov 9, 2013 10:26 PM (in response to keithgvp)
You must use MPEG-2 for DVD. That being said, 6 hours is way too long to fit on a single layer DVD. Even a dual layer for that matter.
You can find out the bitrate needed for a single layer 4.7GB DVD by diving the length in minutes of your program by 560. 6 hours x 60 minutes = 360 minutes. 560/360 = 1.5Mbs. Way too low for any quality. You want at least 5Mbs. maybe as low as 4Mbs. for not a lot of motion/action for any decent quality.
That being said, Compressor does a great job for DVD compression with the proper settings, and utilizes multi-core compression with Qmaster to get things compressed quicker.
So, you may want to consider dual layer DVD's and breaking it into a couple discs for best quality.
Currently Being ModeratedNov 10, 2013 7:31 AM (in response to keithgvp)
Posthumous as you covered. You must use mpeg2 with a DVD and 2 hrs is the practical max for a single sided disc.
Having said that, no one is going to watch all 6 hours in one sitting so breaking the documentation into multiple discs is not an issue. The real question is how you organize the material.
In projects like these, I organize the material by theme, which may or may not have anything to do with the sequence of presentations. Working this way makes for an easy indexing process. People look for a topic and do not need to know when the talk happened during the conference.
I would make 3 single layer disks. Double layer discs created by a home burners may have issues when played on some machines. You'll have much fewer issues with single sided material.
Currently Being ModeratedNov 10, 2013 12:51 PM (in response to Studio X)
Thanks S-X and Posthumous,
That confirms my supposition that 3 single layer discs would be the way to go. I also considered double layered, but have encountered past problems playing them back on one or another device. I'm aware that commercial discs for Hollywood movies can have a far higher content - but of course have more sophisticated burner/replication requirements than my MDD superdrive.
I also realize that apparently DVDSP and other mastering programs recognize content length, not file size...not sure why, exactly, but am sure there's a technical answer. If a more or less one hour 12 GB QT file can be compressed to an MPEG 4 900+ MB size, it would seem you could squeeze 4.5 hours onto a 4.7GB disc.
Either way, I've found that my iDVD v. 8 will accept the Mpeg-4 clips, and the only drawback is that, although I indeed intend to divide the speakers into chapters, or actually, clips - I then can't do a "Play All" for each disc - but the viewer will see a return to the menu after each (quite lengthy ca. 45 min.) talk. As you suggest, X, that's probably a relief - time for coffee :-)