I’m sorry, but you have encountered and old and viscious bug which has nothing to do with your drives and hardware. In the “old days” this used to be referred to as the clip from hell, although I think that there were actually a few different bugs which all did basically the same thing- corrupt your timeline and prevent you from editing.
Many years ago a guy on the IMUG email list called Jason Stelzel figured out an exact series of everyday editing steps needed to produce a corrupt timeline, and personally demonstrated it to Media 100 staff at NAB many years ago (we’re talking 5 or 6 years) ago. The bug has been well documented and discussed on various Media 100 forums and email lists but has never been fixed. Although I haven’t encountered it for several years (I hardly edit now, I’m 95% After Effects) it used to make me so f*****g angry that I wanted to throw the whole system out and replace it. At one stage I wrote an 11 page complaint letter to Media 100 but that didn’t do too much, although at least they acknowledged they got it and they did address some of the issues I raised.
Let me summarise quickly, in case a lot of repressed anger comes bubbling up and I punch a hole in a wall:
– there is a bug in Media 100i in which your timeline can become corrupt. Creative Cow resident David Bogie used to call it “Media 100 eating its own children”. As I said above, it may actually be a few different bugs and some of them may have been fixed since, but basically you will either have one clip in the timeline that will crash your system if you try to edit it (the clip from hell) or else you’ll do something like “swap AB” and suddenly half the clips in your timeline dissapear, or you get a message saying that Media 100 found “overlapping clips” then it will delete a few clips and editing from then on will be really flaky, clips and especially transitions will dissapear randomly.
– the bug has been there for many years, although it was possibly a combination of several bugs, some of which may have been fixed in various revisions, which would explain why it’s reasonably rare. It is only on the Mac version. But it’s definitely something which has happened throughout my entire career as a Media 100 editor.
– you are more likely to encounter the bug if you edit in the timeline, ie. split clips, close gaps, and the swap A/B command seems to play an important role. If you edit in a more traditional 3-point method, or edit in the edit-suite rather than in the timeline you are less likely to encounter the bug. If you have really long clips on one track, and have a few short clips on the other track as cutaways, then you are asking for disaster. I developed the habit of never having “dark green” bits in my timelines, I would split a clip and delete any parts of a long clip that weren’t visible during a cutaway.
– in fairness, version 8.2.2 isn’t exactly new so maybe the bug has been fixed in current and future versions of the software. But it wasn’t fixed for many years even though it was well documented. You are talking about an old bug, but you are using old software.
– it is a software problem and has nothing to do with your hardware, so don’t waste time changing your drives.
– you can try to copy and paste clips into a new timeline but there’s a chance that will be corrupt too.
– as far as I know there isn’t a true solution, and although yelling and swearing can make you feel better it won’t fix anything (I’ve tried hundreds of times). The best bet is to get an older version of the program out of your backups folder and rebuild a new program by copying and pasting clips into a new program a few at a time.
I feel really sorry for you. I hope you haven’t lost too much work. I also hope that considering Media 100 has had 2 different owners since v 8.2.2 was released that this bug isn’t present in the forthcoming Media 100 SW product.
-Chris.
Motion Graphics Designer
Will animate for food