[LAU] Slow but pitch-correct video playback

[Philipp Überbacher]

On Wed, 24 Sep 2014 15:18:51 +0200
Edgar Aichinger <edogawa at aon.at> wrote:

> Am Dienstag, 23. September 2014, 22:29:27 schrieb Philipp Überbacher:
> > On Tue, 23 Sep 2014 20:39:03 +0200
> > Edgar Aichinger <edogawa at aon.at> wrote:
> > 
> > > Am Dienstag, 23. September 2014, 20:21:30 schrieb Philipp
> > > Überbacher:
> > > > Hi there,
> > > > 
> > > > I encountered a nice piano learning video including hands and
> > > > animated keys, but since it is playing at original speed it is
> > > > way to fast for me to learn that song. In case anyone is
> > > > interested, it's this video and I think it's rather nicely done
> > > > (don't hate me for the music :P):
> > > > https://www.youtube.com/watch?v=Ej6MF5KjuOc
> > > > 
> > > > I found one way which sort of works (after settings LADSPA_PATH)
> > > > but it sounds quite horrible. Is there a better way to do this?
> > > > http://markplusplus.wordpress.com/2006/10/01/pitch-correct-play-speed-with-mplayer/
> > > > 
> > > > Is there a stretchplayer for video?
> > > 
> > > VLC can do that, there's no nice GUI element for speed control,
> > > but a submenu in "playback" menu... don't expect high quality
> > > either.
> > > 
> > > Edgar
> > 
> > Hi Edgar,
> > 
> > both mplayer and VLC provide such controls, it allows to slow
> > down or speed up the video but the audio is not pitch corrected as
> > far as I can tell.
> 
> Hi again, Philipp,
> 
> I wouldn't have suggested it if it wouldn't timestretch (while
> retaining pitch), I also explicitely tested it before I sent my mail
> and can assure that it doesn't change pitch while slowing down, both
> in video and audio files...  
> 
> Edgar

Hi Edgar,

it was a mistake on my side. There is an option that needs to be
enabled. It can be found under Tools -> Preferences -> Audio and there
in the effects section is an option called 'Enable Time-Stretching
audio'. If enabled the pitch is corrected.

Regards,
Philipp