[Kdenlive-devel] Serious MLT audio bug - probably related to interlacing

[Dan Dennedy]

On Sunday 24 June 2007 00:08, Jean-Michel Pouré wrote:
> Dear friens,
>
> I can confirm the problem with MLT audio.
> I have exactly the same problem.

I just made a fix in mlt SVN. Please try it.

> Le samedi 23 juin 2007 à 19:01 +0200, Jan Uhlir a écrit :
> > MLT bug probably related to latest interlacing support. Audio is TWICE as
> > speed as video. This affect both kdenlive playback in monitors and
> > rendering to file.
> >
> > Description:
> > When you watch rendered video clip audio stops exactly in the middle of
> > movie. Sound is choppy and somewhat "compressed" all human voices sound
> > "clownish". When playbacked in inigo or Kdenlive sound is very choppy,
> > hardly listenable and even video jerking, choking and bursting again in
> > waves.
> >
> > Testing files:
> > http://espinosa.klenot.cz/videotest/test_beach_clip.kdenlive
> > http://espinosa.klenot.cz/videotest/test_beach_clip2.vob
> >
> > Testset:
> > 1/ playback in inigo
> > ./inigo ~/video2/test_beach_clip.kdenlive
> >
> > 2/ render using inigo - plain
> > espinosa at esplaptop:~/build/kdenlive/bin> ./inigo
> > ~/video2/test_beach_clip.kdenlive -consumer
> > avformat:/home/espinosa/test2.vob real_time=0
> >
> > 3/ render using inigo - ildtc and ilme
> > espinosa at esplaptop:~/build/kdenlive/bin> ./inigo
> > ~/video2/test_beach_clip.kdenlive -consumer
> > avformat:/home/espinosa/test3.vob real_time=0 ildct=1 ilme=1 +-----+
> > +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+
> >
> > |1=-10| |2= -5| |3= -2| |4= -1| |5=  0| |6=  1| |7=  2| |8=  5| |9= 10|
> >
> > +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+ +-----+
> > No accelerated IMDCT transform found
> > Current Position:        297
> >
> > Results:
> > All the same. Choppy "compressed" sound, audio finishes in the middle of
> > playback.
> >
> > -----------------
> >
> > The old mlt 0.2.3  is OK
> > Tested on kdenlive (playback, render) and ingo (playback, render)
> > The same test set - everything OK. Not tested in HW DVD player - it is
> > another story.
> >
> > -----------------
> >
> > This bug affects heavily both kdenlive playback (timeline monitor, clip
> > monitor) and render. See this bugreports:
> > http://www.kdenlive.org/bbforum/viewtopic.php?f=16&t=92
> > http://www.kdenlive.org/bbforum/viewtopic.php?f=16&t=16
> > http://www.kdenlive.org/bbforum/viewtopic.php?f=16&t=64
> > 3 different reporters encountered this problem
> >
> >
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