[MPlayer-dev-eng] [PATCH] af_scale* command-line only

Robert Juliano juliano.1 at osu.edu
Thu Jun 21 05:42:06 CEST 2007


I wrote:
> Here are just the filters (no interactivity and not tied to
> playback_speed).  This patch only changes files in libaf and
> then just enough to enable the filters.  This should be easier
> to test and allow those in PAL-land to have the audio play
> at a different tempo than the video (why they would want that,
> I dunno know).
> 
> Usage:
>   mplayer -af scaletempo=1.25 -speed 1.25 ...
>   mplayer -af scalerate=.8 -speed=.8 ...
>   mplayer -af scalepitch=1.5 ...
> 
> As for performance, chaining five instances of scaletempo on
> my Athlon XP 3200, uses roughly 10% of the CPU.  The WSOLA
> technique does little more then selectively skip forward/backward
> overlapping each skip.  No DSP or FFT number crunching.  And
> it produces quite decent results.
> 
> ...

Any feedback?  Do they compile?  Run?  Crash?  Contain silly code?

Robert



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