Does iDVD just use the bitrate it needs to fit the content on the DVD or is there a bitrate where the application would consider the quality as unreasonable for the viewer?
Background, in old 4:3 themes there is a max of 12 menue buttons allowed be used. In the 16:9 themes (iDVD 6 and 7) it is 15.
With "professional quality" setting. I was able to put all 12 clips that I had on the DVD and it resulted in a bitrate something over 3000kbps. Testing the same setting with only one of the clips the result was a bitrate of 5936kbps. (Both 1500kbps PCM audio, which seems one can't change to AC3, right?).
Does iDVD "know" what is still good? and why didn't it tell me to use less clips (something arround 6 I guess) to be able to get 5900kbps, when it decided, that with a single file it should rather be 5900kbps than 3000 something. Also why didn't it just utilize the full available bitrate of the DVD standard, while I am using only a 10min. clip?
I have yet to test, what using 15 clips will result in or if it will maybe tell me to use less clips or a bigger DVD (8.5GB over 4.7GB), because the resulting btrate for 15 clips and a space of 4,7GB will be to low for professional quality; and I have to look what bitrate iDVD actually will choose in that scenario.
I wonder, if one of you can judge, if a 65MB file (10min. cartoon, 670kbps AVC and 112kbps audio AAC) will need a certain bitrate or be willing to look at the file for me. (I would upload the file for you).
I can only compare the results of 3000kbps vs 5900kbps on a cheap 1280x1024 19" TN panel.
