The MP3's may be causing it. Try disabling the audio track and see if it will play smoothly.
.wav is usually the best format for audio while editing.
If the jerkiness stops without audio I would convert the MP3 to .wav.
It mostly variable bit rate mp3's that create the problem in my experience.
I could try it. But why did it work in 13? It never complained. And I still get the same problem pulling in a single AVI file all by itself.
Why ask why? It just is.
Terry is right. For some reason, some MP3s put a drag on some projects.
Using exclusively WAV files for your audio will eliminate that possible bottleneck.
I tried deleting the audio track, but it did not work.
I tried creating a single-clip project with no audio, but it did not work.
The video was still dancing like Fred Astaire with a sprained ankle. Frames were still skipping forward and backward. Ten frames forward, five frames backward. (Not those exact proportions, but it'll give you an idea.) It was playing hopscotch with my video assets.
It never did this under PME 8 and 13.
All is not lost, though. I am now confident that, in the end, any video files and DVDs created from these projects will have the frames written out in correct sequence without compromising speed. Playback will be smooth. Even using .mp3 files in the soundtrack. I just did the one thing that I never had to do before. Render the timeline. That's why I think that the final assembled product will work. It renders the frames anyway when saving to a playable file. D'oh!!!!!
It'll take a while to render a full video project, but if I click the Render button in the morning, it'll be ready in the evening.
Thank you for your help. Have a great day.
I spoke too soon. The final saved .mp4 file has all kinds of jumps in it.
I'm going to chalk it up to it being a bug in 14, and go back to 13 until it gets fixed. At least I know that version works.
The same thing happens even with straight .avi files, with no additional sound tracks and no additional effects. The score is lower than it is unrendered, but still greater than zero. It seems odd that a new release requires going through extra hoops that weren't needed with previous versions (8 and 13).