Hey Folks!
I'm using Kdenlive for about half a year now, haven't had major problems at all. A few days ago I updated my Gentoo-system to ~x86, which is the "unstable" branch of portage. From all I heard and looking at the other programs running fine, this "unstable" branch isn't very unstable.
With this update, Kdenlive was updated from 0.9.2. to 0.9.4 and mlt from 0.8.2 to 0.8.8. Now, when I try editing a video, the audio is out of sync with the video and stutters. A lot. I have a video-track without audio, an audio-track containing the videos audio and a second audio track. The project was generated with the old version of Kdenlive and all was fine. When I opened the project in the new version, the audio is out of sync, I think. Can't really tell, because of the stuttering, but I think it's a bit of. Also, when I try to render a part of the project, after about 2 minutes, my 8 GB Ram is full. That didn't happen before. I tested this with a part of the project I could successfully render before.
After playing around with audio-/video-drivers and opengl (and disabling pulseaudio via pasuspender), I gave up and decided to downgrade - which didn't make Kdenlive usable again. After downgrading back to 0.9.2 (mlt: 0.8.2) the audio and video is really badly out of sync. Not only in the preview, but also after rendering. Funny thing: I chopped the audio-tracks at their beginning and kdenlive does play the chopped part, which it shouldn't. Oh, and when i seek through the playing preview, the sound just continues playing like i wasn't seeking, while the video jumps to the correct position.
By the way: I tried using melt (both versions) to play videos, it worked like a charm.
Some more information about my system: 8 GB Ram, 3,2Ghz Quadcore (Intel i5), 2 graphic-cards (both nvidia, one GeForce GTX 295, one Quadro FX 580), using Gentoo (last synced: two days ago or so), using pulseaudio, but tried starting Kdenlive with pasuspender.
As you probably can imagine, i can't use Kdenlive like this. I really hope, someone can help me.
I just tried creating new projects, but it doesn't fix the problems. Tested both versions.
But i just found out something different. 0.9.4 seems to have problems with multiple audio tracks. When trying if a new project helps, I used only one audio track at first and the problem with the preview was gone. Haven't tested rendering yet, though. And unfortunately it wouldn't really help me anyways as I need the 2 audio tracks.
The sourcefiles being used are MP3s and mpeg2-encoded avis. ffmpegs version is 0.10.3 and it hasn't changed when I did the update, as my notebook, where I haven't changed to unstable yet, has the same version.
By the way, on my notebook Kdenlive runs fine. If all else fails, I could use it to render my videos, but my computer has more power, better graphiccards, more Ram... I really do want to get Kdenlive running again on this machine ;)