I am talking about chopping up many clips recorded on mobile phones and used in a 4 minute video, to produce a music video.
I am guessing i have about 30 short clips over a 4 min period, all with audio turned off. I do not have many effects on them, some have speed change, a few have fade out, but nothing else. If i go to edit a clip in the middle somewhere and put an effect on it, it seems to mess up clips later on in the timeline (some go jerky, some lose the effect they had, some speed up, slow down or trim the end off).
A fix i found was to move the clip i want to edit completely away, put an effect on or edit however, and then move it back into its position on the timeline. Even then this did not work sometimes and was causing problems with the next clips.
It was starting to drive me crazy. sometimes i thought i had fixed it all and then i'd produce it and realise one clip just stutters a bit, and i have to go back and try and fix it again. Infuriating when you have spent hours already trying to perfect it.
Any idea why this is happening? Is it just that PD is not very good at handling as many short clips as that over a small amount of timeline?