[MPlayer-users] channel switching and audio filters

[Nan Null]

> ------------------------------
> 
> Message: 3
> Date: Sat, 8 Dec 2007 18:01:46 +0100
> From: Ivo 
> Subject: Re: [MPlayer-users] channel switching and audio filters (was
>     Re:    MPlayer-users Digest, Vol 48, Issue 17)
> To: "MPlayer usage questions, feature requests,    bug reports"
>     
> Message-ID: <200712081801.46936.ivop at euronet.nl>
> Content-Type: text/plain;  charset="iso-8859-1"
> 
> On Friday 07 December 2007 16:28, Nan Null wrote:
> > Thank you for the pointer.  The bug report is filed here: 
> > http://bugzilla.mplayerhq.hu/show_bug.cgi?id=957
> >
> > This is a pitch shift filter.  In that report, I also mention
> a
> 
 problem
> > when there are 2 audio tracks, the filter doesn't work with the
> 2nd
> 
 track
> > when switch track on the fly by users, or when switch the track
> back
> 
 to
> > the old track, the audio will be reset to normal pitch
> (unless
> 
 there's
> > something I miss here).
> >
> > The command I use is:
> >
> > mplayer -af ladspa=tap_pitch:tap_pitch:0:0:-90:0 -fs -fixed-vo -vf
> > yadif=3:1 -slave -quiet -noborder -brightness 0  somevideo.mpg
> >
> > or with pitch shifted:
> > mplayer -af ladspa=tap_pitch:tap_pitch:5:0:-90:0 -fs -fixed-vo -vf
> > yadif=3:1 -slave -quiet -noborder -brightness 0 somevideo.mpg
> >
> > If you can't reproduce the problem, I'll find a way to submit
> the
> 
 video
> > to you.  Thanks.
> 
> I can reproduce your problem. As a matter of fact, I can reproduce
> it
> 
 with 
> _any_ audio filter. e.g.
> 
> mplayer -v -af volume=-10 fubar.avi
> 
> has the same problem. So, this does not seem related to a bug in any
> of
> 
 the 
> filters or the tap_pitch plugin, but in the channel switching code.
> 
> It looks like the whole audio filter chain is destroyed and
> rebuilt
> 
 with 
> default values instead of those given on the command line. I am
> not
> 
 that 
> familiar with the channel switching code, but if I can find some time
 
> tonight, I will look into it.
> 
> Also, could you please switch to non-digest mode or at least change
> the
> 
 
> subject line back to what it used to be? I almost overlooked
> this
> 
 reply, as 
> it was not properly threaded.
> 
> --Ivo
> 

Thank you for looking into this.  It's very nice to see it's fixed so
 quickly.  It would be wonderful if the other problem get fixed (some
 video files doesn't play with the filter), and the ability to change pitch
 while playing.
 


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