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

[Jean-Michel Pouré]

Dear friens,

I can confirm the problem with MLT audio.
I have exactly the same problem.

Kind regards,
Jean-Michel

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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