[Kdenlive-devel] Audio cut "slips" from cutting point -- bug?

jb jb at ader.ch
Sun Mar 25 12:23:55 UTC 2007


On Wednesday 21 March 2007 00.06:54 Stephane Fillod wrote:
> Tue, Mar 20, 2007 at 11:03:05AM -0300, Fabricio Rocha skribis:
> > My project has a lot of clips from a single .VOB file, NTSC DVD with AC3
> > 48k audio, and lots of crossfade transitions among the clips. The
> > transitions work OK in the timeline itself, but when I export the
> > timeline to a video file, I notice that, while the video is correctly
> > cut and crossfaded in the clip end, the audio from clip "A" is extended
> > beyond the point where it should end, and only then the audio track of
> > clip "B" starts.
> >
> > This causes a cumulative effect. In a certain point of the final video,
> > the audio track was completely out of sync with the video, something
> > like a 5 seconds delay. I tried to export to many formats, but the
> > problem remained.
> >
> > Is this a known bug? Does it happen to any of you? Or am I doing
> > something wrong?

Ok, I did some tests and it seems to me that the problem occurs if you export 
to a format which has a different audio frequency. Can you confirm this ?

Copy the export settings from a profile that shows the bug and create a new 
custom encoder with the same settings, but change the "frequency=" parameter 
to match the frequency of your source video: "frequency=48000".

Let me know if export works fine that way...

regards
jb
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