I’ve added this to the FAQ on vided.org:
Q: I’ve got problems with playing video projects, or sound is randomly disappearing while viewing a project ?!?
A: So do I one some systems. I can’t find the reason for this. The problems only appears while playing SMIL, the single mpeg4 clips all work fine. The version of your Quicktime viewer is essential. Version 6.52 works quite good, usually, but it’s having a few problems with sound randomly going quiet. Bug in Quicktime? Moving the progress bar back and forth again fixes this, for unknown reason, but this is a quite bad “solution” of a quite annoying problem. Version 7.0x has worked flawlessly on my development system, also regarding the sound issue mentiones, while on other computers, it’s reporting about “can’t find video clip” even though the clip exists at mentioned URL. I don’t have access to a lot of Macs, I don’t know if they are better or worse. I’m looking at the problem, but it’s quite complicated, and I can’t manage to reproduce it on different computers. If I’ve got Firefox 1.07 and Quicktime 7.03 on two computers, one might work fine, while the other computer has problems. This is a cry for help, I guess, in my own FAQ. What is factor X, resulting in these problems?
There are three different problems. Problem 1 is most annoying!
1. Video clips reported to not exist, even though they DO exist. SOME of the tested QT7.0x only. Reinstalling QT7 does not have any effect.
2. Sound disappearing. Qt6.52 only.
3. Subtitles. Not looked into this problem thorough enough. It worked once, now there’s problems.
Are you affected? Try this test project. It’s a project consisting of a short video, a picture with music in the background, ending with a short video, music still playing. Give me a comment please. Any problems? Which problem? Give me details of your system: OS, browser, QT version - and the unknown factor X, if you happen to know about it! 