On 21 Mar 2007, at 01:59, Edward Agabeg wrote: It's been a while since I last looked at this, and there's been at least one release of QuickTime since then, but we were using the iPod export component and still had problems producing movies which will work on an iPod. What usually happens is that iTunes will accept the movie, but when you play it on the iPod, you just get a black screen. We get the same result using QuickTime Player to do the conversion, so I think the original movie is somehow at fault. I'll try and create a movie which reproduces the problem, but they tend to be big so they can;t be easily attached to a bug report.
Hi Jerry,
If you can reproduce it I know engineering will want to check it out. Please make sure to include a link to the pre-conversion source movie if it's large as you say (.mac works or whever works for you). It would also be very helpful if you could outline the workflow that leads to this transferable yet unplayable .m4v.
When we tried using the m4v converter, we had even less luck. Usually iTunes would reject the movie as being unplayable on an iPod, but wouldn't say why. I'm guessing it was the data rate.
Hmmm, that symptom is usually because the .m4v file wasn't "tagged" correctly (if it was larger than 320x240) but could very well be a profile issue. May I ask what the ".m4v" converter is, do you mean the "Convert Selection for iPod" menu item in iTunes' Advanced menu? Or are is this out of QTPlayer?
Actually, looking back, we were generating movies directly using H.264 or MPEG 4 (using the new ICM session APIs) and couldn't get them to transfer or play on the iPod - it seemed to be impossible to get the data rate low enough. We switched to rendering the movie into a file and then using the iPod converter with some success, but it was by no mean infallible.
Jerry
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