It's only this new export that has issues? Older exports still play fine?
How does it look after uploading to Vimeo?
Yes the old exports still play fine - I have the Premiere Pro project for the old version (where the only difference is that it still got the crossovers) and if I export this again, it plays fine.
My theory is that the exporter for some reason doesn't recognize that something has changed - perhaps because it's a too small change, and then something goes wrong.
So I was thinking I should edit the project a bit more - I tried to add an extra test title in the beginning of the video - this didn't help. Then I tried to add the test title in the main video track in the end (the other one was in video track 4) as well. Now it seems to be smooth again, I don't know if this is a coincidence though.
Do you have any explanation for what is happening? It's really strange
I didn't try to upload the choppy version to Vimeo. The older ones had some issue where some artifact appeared and suddenly popped away - this was only when watching the video in Chrome (and with the latest version of flash player, the issue went away when using an older version) - in Internet Explorer it plays as it should. This is why I was experimenting with the bitrate to see if I could fix it somehow so it worked in Chrome too.
Vimeo recodes everything, so whatever you do on your end isn't likely to help because that's not the version anyone actually watches.
I think you're right - but I was talking with the Vimeo support about the problem and they suggested me to upload with a higher bitrate (it was 6Mbps) - though this didn't fix the issue. It's also very strange that it's only in Chrome, and only with the newest flash player. In some test uploads I've done it's not as bad, but in others it's worse - with no real connection to the bitrate used.
Regarding the Premiere Pro export problem, have you seen anything similar to what I'm experiencing?