So I stupidity decided to do an actual work project on kdenlive instead of FCP.. and although it took me 16 hours instead of 7 like usual (it's something I do every week), I did get it done at some early time in the morning (have a list of about 30 bugs, will put them into Mantis next week when I have more time).

The client got back to me today with a few small changes, and I've run into a HUGE problem.

For some reason, the Audio is totally out of sync now (the project was fine yesterday, and I've not changed anything since).. by totally out of sync I mean not even the correct audio file is playing at the right time!

I've gone back to previous version (I save under a new filename at each major stage of the project incase files get corrupt), and it's the same!

When I move the play head to a particular place in the timeline and hit play, it seems to be playing from a totally different location, not even close to the play head. I have a lot of concert footage with the original backing tracks added (as WAV files), and its almost like it's playing the wrong file. In spots where it seems to be the right file, it's way way out of sync (not even playing the correct part of the file, seems to be playing from the beginning and ignoring the crop-start value).

I noticed every clip in the project tree has the wrong duration too, when I hit 'reload clip' it changes to the correct one, but playback is still totally screwed.

I urgently need to make changes to this file, if worse comes to worse I might be able to chop it up in FCP and fix, but would loose quality (re-encoding an already encoded file), can anyone help me fix this project, it took 16 hours to make and the thought of having to totally re-build in FCP is not fun.

If anyone has any ideas.. please please help.. 16 hours of work about to be wasted here :-(

More info.. something is horribly wrong with my project files, they have become corrupt for no apparent reason.

When I check an earlier saved project, the length of audio clips is correct. In the most recent ones (last 3 revisions) it's wrong.. here is the messed up thing: All the projects point at the same file, in the same path.. exactly the same.. but they are reporting different times! All projects are the same settings and FPS (I just do a save-as under a new name every few hours..)

Snapshot of old and new projects loaded together: http://www.gothicawakening.com/graphics/snapshot-kden-audio-bug.png

Something somewhere inside the most recent projects must have messed things up.. the problem is, even hitting reload clip doesn't fix it, although my project was fine last night when I rendered out, this morning when I reopened it, it was like this. I have no idea how that could happen, the file was not changed overnight, and I just re-watched the render output, its fine, all the audio is in sync.



OMG - Please web admins.. WHY oh WHY do I have to type a Captcha with every post? It lets me hits "Save", and then shows an error "To complete this form, please complete the word verification below.".. at least it should show the Captcha on the same page where the initial 'Save' button is instead of letting you hot Save and then showing the error.

with regards to the audio, I have seen similar issues - http://www.kdenlive.org/mantis/view.php?id=2160

I have found that using MP3s leads to sync issues, if you play the project from the start, the audio is in sync by the end. If you open the project and play it from a point mid way, the audio is a few seconds out of sync.

Only way round this I have found is to use WAV rather than MP3

I'm having problems with both WAV and MP3 files.. both are showing with the wrong duration in the latest projects (in the Project Tree) - in my screengrab the first and last audio files are WAV, the middle is MP3.

In the end, I managed to fix it by cutting & pasting some stuff from a project file where it was correct to the newer one using a text editor.. it took a little trial-and-error, and I had to re-arrange some of the audio clips on the timeline afterwards, but in the end it all came back into sync.

I noticed that all the keyframes in the rubber-banding (keyframeable volume) were in the wrong place too, they appeared to be compressed into less time then they should be.. I'm guessing all the problems are caused by the project thinking the audio is a different length then it is.. although why in 1 project it's correct, and in another it's not.. I have no idea.

It could be possible that the same bug is causing both my problem and the one you pointed out..